./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro --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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- 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-8393723 [2022-11-18 20:00:58,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:00:58,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:00:58,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:00:58,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:00:58,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:00:58,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:00:58,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:00:58,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:00:58,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:00:58,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:00:58,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:00:58,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:00:58,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:00:58,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:00:58,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:00:58,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:00:58,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:00:58,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:00:58,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:00:58,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:00:58,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:00:58,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:00:58,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:00:58,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:00:58,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:00:58,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:00:58,620 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:00:58,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:00:58,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:00:58,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:00:58,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:00:58,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:00:58,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:00:58,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:00:58,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:00:58,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:00:58,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:00:58,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:00:58,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:00:58,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:00:58,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-18 20:00:58,654 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:00:58,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:00:58,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:00:58,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:00:58,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:00:58,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:00:58,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:00:58,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:00:58,658 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:00:58,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:00:58,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:00:58,659 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:00:58,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:00:58,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:00:58,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:00:58,660 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:00:58,661 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:00:58,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:00:58,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:00:58,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:00:58,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:00:58,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:00:58,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:00:58,663 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:00:58,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:58,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:00:58,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:00:58,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:00:58,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:00:58,665 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_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-11-18 20:00:58,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:00:58,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:00:58,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:00:58,975 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:00:58,978 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:00:58,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/verifythis/tree_max.c [2022-11-18 20:00:59,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/716c7dd11/95f7af5b589a4e339bec6ec7aa7f029a/FLAG29ec12f48 [2022-11-18 20:00:59,500 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:00:59,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/sv-benchmarks/c/verifythis/tree_max.c [2022-11-18 20:00:59,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/716c7dd11/95f7af5b589a4e339bec6ec7aa7f029a/FLAG29ec12f48 [2022-11-18 20:00:59,894 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/716c7dd11/95f7af5b589a4e339bec6ec7aa7f029a [2022-11-18 20:00:59,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:00:59,898 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:00:59,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:59,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:00:59,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:00:59,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:59" (1/1) ... [2022-11-18 20:00:59,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f880d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:59, skipping insertion in model container [2022-11-18 20:00:59,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:59" (1/1) ... [2022-11-18 20:00:59,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:00:59,940 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:01:00,118 WARN L234 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_ccc64d87-a67e-444a-882c-754b65d889b9/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-18 20:01:00,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:01:00,149 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) [2022-11-18 20:01:00,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45c3dfda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:00, skipping insertion in model container [2022-11-18 20:01:00,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:01:00,151 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 20:01:00,153 INFO L158 Benchmark]: Toolchain (without parser) took 253.40ms. Allocated memory is still 125.8MB. Free memory was 89.0MB in the beginning and 102.7MB in the end (delta: -13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:01:00,153 INFO L158 Benchmark]: CDTParser took 0.86ms. Allocated memory is still 125.8MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:01:00,155 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.28ms. Allocated memory is still 125.8MB. Free memory was 88.8MB in the beginning and 102.7MB in the end (delta: -13.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-18 20:01:00,156 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86ms. Allocated memory is still 125.8MB. Free memory is still 106.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.28ms. Allocated memory is still 125.8MB. Free memory was 88.8MB in the beginning and 102.7MB in the end (delta: -13.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro --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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- 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-8393723 [2022-11-18 20:01:02,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:01:02,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:01:02,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:01:02,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:01:02,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:01:02,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:01:02,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:01:02,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:01:02,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:01:02,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:01:02,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:01:02,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:01:02,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:01:02,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:01:02,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:01:02,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:01:02,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:01:02,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:01:02,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:01:02,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:01:02,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:01:02,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:01:02,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:01:02,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:01:02,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:01:02,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:01:02,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:01:02,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:01:02,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:01:02,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:01:02,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:01:02,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:01:02,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:01:02,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:01:02,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:01:02,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:01:02,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:01:02,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:01:02,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:01:02,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:01:02,360 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-11-18 20:01:02,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:01:02,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:01:02,399 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:01:02,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:01:02,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:01:02,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:01:02,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:01:02,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:01:02,402 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:01:02,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:01:02,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:01:02,404 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:01:02,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:01:02,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:01:02,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:01:02,405 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:01:02,406 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:01:02,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:01:02,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:01:02,406 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:01:02,406 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:01:02,407 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:01:02,407 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:01:02,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:01:02,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:01:02,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:01:02,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:01:02,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:01:02,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:01:02,409 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:01:02,409 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:02,409 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:01:02,410 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_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-11-18 20:01:02,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:01:02,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:01:02,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:01:02,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:01:02,879 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:01:02,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/verifythis/tree_max.c [2022-11-18 20:01:02,969 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/f9bb2b885/dd02198e551641a39d05869ad24a7121/FLAGcd5ae2c51 [2022-11-18 20:01:03,654 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:01:03,655 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/sv-benchmarks/c/verifythis/tree_max.c [2022-11-18 20:01:03,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/f9bb2b885/dd02198e551641a39d05869ad24a7121/FLAGcd5ae2c51 [2022-11-18 20:01:04,000 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/data/f9bb2b885/dd02198e551641a39d05869ad24a7121 [2022-11-18 20:01:04,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:01:04,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:01:04,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:01:04,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:01:04,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:01:04,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d8fa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04, skipping insertion in model container [2022-11-18 20:01:04,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:01:04,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:01:04,187 WARN L234 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_ccc64d87-a67e-444a-882c-754b65d889b9/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-18 20:01:04,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:01:04,228 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 20:01:04,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:01:04,236 WARN L234 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_ccc64d87-a67e-444a-882c-754b65d889b9/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-18 20:01:04,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:01:04,265 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:01:04,318 WARN L234 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_ccc64d87-a67e-444a-882c-754b65d889b9/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-18 20:01:04,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:01:04,346 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:01:04,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04 WrapperNode [2022-11-18 20:01:04,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:01:04,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:01:04,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:01:04,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:01:04,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,385 INFO L138 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-11-18 20:01:04,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:01:04,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:01:04,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:01:04,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:01:04,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:01:04,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:01:04,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:01:04,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:01:04,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (1/1) ... [2022-11-18 20:01:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:01:04,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:04,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:01:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:01:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:01:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:01:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:01:04,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:01:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:01:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-18 20:01:04,500 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-18 20:01:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-18 20:01:04,500 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-18 20:01:04,500 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-18 20:01:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-18 20:01:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:01:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:01:04,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:01:04,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:01:04,591 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:01:04,593 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:01:05,230 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:01:05,238 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:01:05,239 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-18 20:01:05,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:01:05 BoogieIcfgContainer [2022-11-18 20:01:05,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:01:05,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:01:05,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:01:05,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:01:05,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:01:04" (1/3) ... [2022-11-18 20:01:05,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afac4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:01:05, skipping insertion in model container [2022-11-18 20:01:05,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:01:04" (2/3) ... [2022-11-18 20:01:05,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5afac4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:01:05, skipping insertion in model container [2022-11-18 20:01:05,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:01:05" (3/3) ... [2022-11-18 20:01:05,266 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-11-18 20:01:05,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:01:05,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-18 20:01:05,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:01:05,411 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;@4798743f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:01:05,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-18 20:01:05,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:01:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:01:05,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:05,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:01:05,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash 73597257, now seen corresponding path program 1 times [2022-11-18 20:01:05,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:05,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707888644] [2022-11-18 20:01:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:05,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:05,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:05,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:05,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 20:01:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:01:05,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:05,737 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:05,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:05,755 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:05,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707888644] [2022-11-18 20:01:05,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707888644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:05,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:05,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:01:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565057503] [2022-11-18 20:01:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:05,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:01:05,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:01:05,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:01:05,805 INFO L87 Difference]: Start difference. First operand has 72 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 59 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2022-11-18 20:01:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:06,008 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-11-18 20:01:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:01:06,011 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 [2022-11-18 20:01:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:06,031 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:01:06,031 INFO L226 Difference]: Without dead ends: 71 [2022-11-18 20:01:06,033 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 [2022-11-18 20:01:06,039 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:06,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:01:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-18 20:01:06,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-18 20:01:06,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.631578947368421) internal successors, (62), 56 states have internal predecessors, (62), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:01:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-11-18 20:01:06,122 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 5 [2022-11-18 20:01:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:06,122 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-11-18 20:01:06,123 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) [2022-11-18 20:01:06,123 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-11-18 20:01:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:01:06,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:06,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:01:06,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:06,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:06,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:06,327 INFO L85 PathProgramCache]: Analyzing trace with hash 73597258, now seen corresponding path program 1 times [2022-11-18 20:01:06,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:06,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397413121] [2022-11-18 20:01:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:06,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:06,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:06,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 20:01:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:06,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:01:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:06,429 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:06,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:06,451 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:06,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397413121] [2022-11-18 20:01:06,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397413121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:06,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:06,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:01:06,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458188219] [2022-11-18 20:01:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:01:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:01:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:01:06,459 INFO L87 Difference]: Start difference. First operand 69 states and 80 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) [2022-11-18 20:01:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:06,616 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-11-18 20:01:06,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:01:06,620 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 [2022-11-18 20:01:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:06,622 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:01:06,622 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:01:06,622 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 [2022-11-18 20:01:06,626 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:06,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 132 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:01:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:01:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-18 20:01:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:01:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-11-18 20:01:06,644 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 5 [2022-11-18 20:01:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:06,645 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-11-18 20:01:06,645 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) [2022-11-18 20:01:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-11-18 20:01:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:01:06,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:06,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:06,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:06,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:06,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash -345289291, now seen corresponding path program 1 times [2022-11-18 20:01:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:06,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222458496] [2022-11-18 20:01:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:06,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:06,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:06,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:06,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 20:01:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:01:06,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:07,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:07,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:07,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222458496] [2022-11-18 20:01:07,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222458496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:07,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:07,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:01:07,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106696360] [2022-11-18 20:01:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:07,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:01:07,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:01:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:01:07,084 INFO L87 Difference]: Start difference. First operand 68 states and 79 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) [2022-11-18 20:01:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:07,296 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-11-18 20:01:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:01:07,300 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 [2022-11-18 20:01:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:07,301 INFO L225 Difference]: With dead ends: 83 [2022-11-18 20:01:07,302 INFO L226 Difference]: Without dead ends: 83 [2022-11-18 20:01:07,302 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 [2022-11-18 20:01:07,303 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 11 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:07,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 432 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:01:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-18 20:01:07,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-11-18 20:01:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 61 states have internal predecessors, (66), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-18 20:01:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2022-11-18 20:01:07,330 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 11 [2022-11-18 20:01:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:07,330 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2022-11-18 20:01:07,331 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) [2022-11-18 20:01:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2022-11-18 20:01:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:01:07,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:07,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:07,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-18 20:01:07,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:07,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash -159104294, now seen corresponding path program 1 times [2022-11-18 20:01:07,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248868426] [2022-11-18 20:01:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:07,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:07,538 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:07,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 20:01:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:07,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:01:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:07,658 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:07,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:07,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:07,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248868426] [2022-11-18 20:01:07,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248868426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:07,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:07,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:01:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425401616] [2022-11-18 20:01:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:01:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:01:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:01:07,731 INFO L87 Difference]: Start difference. First operand 76 states and 89 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) [2022-11-18 20:01:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:08,117 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-18 20:01:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:01:08,118 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 [2022-11-18 20:01:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:08,119 INFO L225 Difference]: With dead ends: 80 [2022-11-18 20:01:08,120 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 20:01:08,120 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 [2022-11-18 20:01:08,121 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:08,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 38 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:01:08,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 20:01:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-11-18 20:01:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 61 states have internal predecessors, (70), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-18 20:01:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-11-18 20:01:08,141 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 11 [2022-11-18 20:01:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:08,142 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-11-18 20:01:08,143 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) [2022-11-18 20:01:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-11-18 20:01:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:01:08,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:08,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:08,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:08,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:08,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -159104293, now seen corresponding path program 1 times [2022-11-18 20:01:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245253106] [2022-11-18 20:01:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:08,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:08,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:08,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:08,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 20:01:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:01:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:08,495 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:08,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:08,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:08,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245253106] [2022-11-18 20:01:08,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245253106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:08,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:08,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:01:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793122598] [2022-11-18 20:01:08,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:01:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:01:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:01:08,595 INFO L87 Difference]: Start difference. First operand 78 states and 93 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) [2022-11-18 20:01:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:08,934 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-11-18 20:01:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:01:08,935 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 [2022-11-18 20:01:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:08,936 INFO L225 Difference]: With dead ends: 84 [2022-11-18 20:01:08,936 INFO L226 Difference]: Without dead ends: 84 [2022-11-18 20:01:08,937 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 [2022-11-18 20:01:08,937 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:08,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:01:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-18 20:01:08,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-11-18 20:01:08,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 63 states have internal predecessors, (71), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-18 20:01:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-11-18 20:01:08,947 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 11 [2022-11-18 20:01:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:08,948 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-11-18 20:01:08,948 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) [2022-11-18 20:01:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-11-18 20:01:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:01:08,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:08,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:08,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:09,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:09,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:09,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:09,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1041946460, now seen corresponding path program 1 times [2022-11-18 20:01:09,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:09,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540821414] [2022-11-18 20:01:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:09,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:09,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:09,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:09,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 20:01:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:01:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:09,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:09,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540821414] [2022-11-18 20:01:09,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540821414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:09,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:09,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:01:09,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828480283] [2022-11-18 20:01:09,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:09,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:01:09,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:09,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:01:09,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:01:09,325 INFO L87 Difference]: Start difference. First operand 81 states and 97 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) [2022-11-18 20:01:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:09,497 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-11-18 20:01:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:01:09,498 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 [2022-11-18 20:01:09,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:09,499 INFO L225 Difference]: With dead ends: 92 [2022-11-18 20:01:09,499 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:01:09,499 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 [2022-11-18 20:01:09,500 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 10 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:09,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 432 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:01:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:01:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-11-18 20:01:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 67 states have internal predecessors, (75), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (16), 14 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-18 20:01:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-11-18 20:01:09,511 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 17 [2022-11-18 20:01:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:09,511 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-11-18 20:01:09,512 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) [2022-11-18 20:01:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-11-18 20:01:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:01:09,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:09,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:09,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:09,725 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash -868680531, now seen corresponding path program 1 times [2022-11-18 20:01:09,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:09,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811330133] [2022-11-18 20:01:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:09,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:09,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:09,727 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:09,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 20:01:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:01:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:09,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:09,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811330133] [2022-11-18 20:01:09,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811330133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:09,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:09,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:01:09,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791556169] [2022-11-18 20:01:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:01:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:01:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:01:09,850 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:01:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:10,132 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-11-18 20:01:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:01:10,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-18 20:01:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:10,137 INFO L225 Difference]: With dead ends: 89 [2022-11-18 20:01:10,138 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 20:01:10,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:01:10,139 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:10,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 48 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:01:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 20:01:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-18 20:01:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.558139534883721) internal successors, (67), 59 states have internal predecessors, (67), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (13), 12 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-18 20:01:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-18 20:01:10,148 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 20 [2022-11-18 20:01:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:10,148 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-18 20:01:10,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-18 20:01:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-18 20:01:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:01:10,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:10,150 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:10,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:10,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:10,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash -360622958, now seen corresponding path program 1 times [2022-11-18 20:01:10,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:10,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540231161] [2022-11-18 20:01:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:10,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:10,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:10,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 20:01:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:10,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:01:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:10,593 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:10,639 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_107 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_107) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:10,682 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_107 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_107) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:10,852 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:01:10,852 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-18 20:01:10,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:11,074 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:11,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540231161] [2022-11-18 20:01:11,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540231161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:11,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1654007289] [2022-11-18 20:01:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:11,075 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:01:11,078 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:01:11,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-18 20:01:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:01:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:11,402 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:11,438 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:01:11,507 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:01:11,508 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-18 20:01:11,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:11,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1654007289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:11,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:11,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-18 20:01:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171057396] [2022-11-18 20:01:11,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:11,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:01:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:01:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-18 20:01:11,713 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:01:13,799 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_107 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_107) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-18 20:01:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:14,043 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2022-11-18 20:01:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:01:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2022-11-18 20:01:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:14,045 INFO L225 Difference]: With dead ends: 84 [2022-11-18 20:01:14,045 INFO L226 Difference]: Without dead ends: 84 [2022-11-18 20:01:14,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=4, NotChecked=44, Total=90 [2022-11-18 20:01:14,046 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:14,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 0 Unknown, 269 Unchecked, 0.2s Time] [2022-11-18 20:01:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-18 20:01:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-11-18 20:01:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 62 states have internal predecessors, (71), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (17), 13 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-18 20:01:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-11-18 20:01:14,056 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 29 [2022-11-18 20:01:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:14,056 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-11-18 20:01:14,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:01:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-11-18 20:01:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:01:14,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:14,058 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:14,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:14,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:14,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:14,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash -120629553, now seen corresponding path program 1 times [2022-11-18 20:01:14,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323086846] [2022-11-18 20:01:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:14,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:14,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:14,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:14,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 20:01:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:01:14,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:14,719 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:14,727 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:14,814 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_225 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_225) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:14,865 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_225 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_225) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:14,980 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:14,998 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:01:14,999 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-18 20:01:15,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:15,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323086846] [2022-11-18 20:01:15,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323086846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1775954134] [2022-11-18 20:01:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:15,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:15,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:01:15,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:01:15,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-18 20:01:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:01:15,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:15,617 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:15,626 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:15,674 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_277 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_277) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:15,712 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_277 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_277) |c_#length|))) is different from true [2022-11-18 20:01:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:15,781 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:15,792 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:01:15,793 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-18 20:01:15,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:18,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1775954134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:18,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:18,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:01:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41520837] [2022-11-18 20:01:18,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:18,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:01:18,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:01:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-18 20:01:18,023 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:01:18,096 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_225 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_225) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_277 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_277) |c_#length|)))) is different from true [2022-11-18 20:01:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:18,486 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2022-11-18 20:01:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:01:18,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2022-11-18 20:01:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:18,488 INFO L225 Difference]: With dead ends: 98 [2022-11-18 20:01:18,488 INFO L226 Difference]: Without dead ends: 98 [2022-11-18 20:01:18,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=5, NotChecked=90, Total=182 [2022-11-18 20:01:18,489 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 97 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:18,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 63 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 202 Invalid, 0 Unknown, 393 Unchecked, 0.4s Time] [2022-11-18 20:01:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-18 20:01:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-11-18 20:01:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 74 states have internal predecessors, (82), 13 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2022-11-18 20:01:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2022-11-18 20:01:18,500 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 25 [2022-11-18 20:01:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:18,500 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2022-11-18 20:01:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:01:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2022-11-18 20:01:18,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:01:18,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:18,502 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] [2022-11-18 20:01:18,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:18,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-18 20:01:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:18,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -694882647, now seen corresponding path program 1 times [2022-11-18 20:01:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186628063] [2022-11-18 20:01:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:18,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:18,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:18,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 20:01:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:01:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:19,049 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:01:19,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:01:19,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:19,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186628063] [2022-11-18 20:01:19,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186628063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:19,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:19,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-18 20:01:19,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821918707] [2022-11-18 20:01:19,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:19,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:01:19,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:19,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:01:19,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:01:19,435 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:01:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:20,314 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2022-11-18 20:01:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:01:20,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2022-11-18 20:01:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:20,319 INFO L225 Difference]: With dead ends: 113 [2022-11-18 20:01:20,319 INFO L226 Difference]: Without dead ends: 113 [2022-11-18 20:01:20,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:01:20,320 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:20,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 84 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 510 Invalid, 0 Unknown, 19 Unchecked, 0.8s Time] [2022-11-18 20:01:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-18 20:01:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2022-11-18 20:01:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.4264705882352942) internal successors, (97), 83 states have internal predecessors, (97), 15 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (28), 18 states have call predecessors, (28), 15 states have call successors, (28) [2022-11-18 20:01:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-11-18 20:01:20,331 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 25 [2022-11-18 20:01:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:20,332 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-11-18 20:01:20,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:01:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-11-18 20:01:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:01:20,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:20,333 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] [2022-11-18 20:01:20,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:20,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:20,546 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -694882646, now seen corresponding path program 1 times [2022-11-18 20:01:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945459754] [2022-11-18 20:01:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:20,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:20,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:20,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:20,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 20:01:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:20,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:01:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:20,669 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:01:20,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:01:22,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:22,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945459754] [2022-11-18 20:01:22,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945459754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:22,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:22,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 20:01:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251458533] [2022-11-18 20:01:22,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:22,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:01:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:01:22,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:01:22,586 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 20:01:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:25,370 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2022-11-18 20:01:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:01:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-11-18 20:01:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:25,375 INFO L225 Difference]: With dead ends: 132 [2022-11-18 20:01:25,375 INFO L226 Difference]: Without dead ends: 132 [2022-11-18 20:01:25,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:01:25,376 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 134 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:25,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 111 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 550 Invalid, 0 Unknown, 23 Unchecked, 2.5s Time] [2022-11-18 20:01:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-18 20:01:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2022-11-18 20:01:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 80 states have (on average 1.4) internal successors, (112), 95 states have internal predecessors, (112), 18 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-18 20:01:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2022-11-18 20:01:25,396 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 25 [2022-11-18 20:01:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:25,397 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2022-11-18 20:01:25,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-18 20:01:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2022-11-18 20:01:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 20:01:25,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:25,408 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, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:25,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:25,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:25,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash 986137240, now seen corresponding path program 1 times [2022-11-18 20:01:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706001521] [2022-11-18 20:01:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:25,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:25,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:25,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 20:01:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:25,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:01:25,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:01:25,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:25,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:25,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706001521] [2022-11-18 20:01:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706001521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:25,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:25,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:01:25,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594751800] [2022-11-18 20:01:25,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:25,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:01:25,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:25,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:01:25,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:01:25,845 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:01:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:26,175 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2022-11-18 20:01:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:01:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-11-18 20:01:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:26,182 INFO L225 Difference]: With dead ends: 129 [2022-11-18 20:01:26,182 INFO L226 Difference]: Without dead ends: 125 [2022-11-18 20:01:26,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:01:26,182 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:26,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 357 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:01:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-18 20:01:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-18 20:01:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 80 states have (on average 1.375) internal successors, (110), 95 states have internal predecessors, (110), 18 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-18 20:01:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2022-11-18 20:01:26,198 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 31 [2022-11-18 20:01:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:26,199 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2022-11-18 20:01:26,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:01:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2022-11-18 20:01:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 20:01:26,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:26,201 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:26,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:26,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1746105865, now seen corresponding path program 1 times [2022-11-18 20:01:26,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:26,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526505064] [2022-11-18 20:01:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:26,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:26,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 20:01:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:01:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:26,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:01:26,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:01:26,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:01:26,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:01:27,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:01:27,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:01:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:01:27,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:01:28,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526505064] [2022-11-18 20:01:28,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526505064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:28,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:28,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2022-11-18 20:01:28,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405442122] [2022-11-18 20:01:28,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:28,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:01:28,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:01:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:01:28,801 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:01:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:30,292 INFO L93 Difference]: Finished difference Result 142 states and 181 transitions. [2022-11-18 20:01:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:01:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-11-18 20:01:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:30,295 INFO L225 Difference]: With dead ends: 142 [2022-11-18 20:01:30,295 INFO L226 Difference]: Without dead ends: 142 [2022-11-18 20:01:30,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:01:30,296 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 73 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:30,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1088 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 465 Invalid, 0 Unknown, 74 Unchecked, 1.0s Time] [2022-11-18 20:01:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-18 20:01:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2022-11-18 20:01:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.367816091954023) internal successors, (119), 102 states have internal predecessors, (119), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-18 20:01:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-18 20:01:30,305 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 31 [2022-11-18 20:01:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:30,305 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-18 20:01:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 16 states have internal predecessors, (39), 7 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-18 20:01:30,305 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-18 20:01:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:01:30,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:30,307 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:30,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:30,519 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -592661437, now seen corresponding path program 1 times [2022-11-18 20:01:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030527589] [2022-11-18 20:01:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:30,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:30,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 20:01:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:01:30,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:30,779 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:30,834 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_491 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_491))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:30,875 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_491 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_491)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:30,970 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:01:30,971 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 13 not checked. [2022-11-18 20:01:30,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:31,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030527589] [2022-11-18 20:01:31,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030527589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [543539977] [2022-11-18 20:01:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:31,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:01:31,127 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:01:31,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-18 20:01:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:01:31,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:31,425 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:31,461 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:01:31,523 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:01:31,524 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 13 not checked. [2022-11-18 20:01:31,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:31,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [543539977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:31,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:31,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-18 20:01:31,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268908214] [2022-11-18 20:01:31,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:01:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:01:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-18 20:01:31,671 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:01:33,737 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_491 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_491)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:01:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:33,970 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2022-11-18 20:01:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:01:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2022-11-18 20:01:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:33,972 INFO L225 Difference]: With dead ends: 135 [2022-11-18 20:01:33,972 INFO L226 Difference]: Without dead ends: 135 [2022-11-18 20:01:33,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=20, Invalid=21, Unknown=5, NotChecked=44, Total=90 [2022-11-18 20:01:33,973 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:33,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 47 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 269 Unchecked, 0.2s Time] [2022-11-18 20:01:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-18 20:01:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-11-18 20:01:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.367816091954023) internal successors, (119), 102 states have internal predecessors, (119), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-18 20:01:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-18 20:01:33,986 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 35 [2022-11-18 20:01:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:33,987 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-18 20:01:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:01:33,988 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-18 20:01:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 20:01:33,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:33,991 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:34,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:34,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:34,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:34,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1427695232, now seen corresponding path program 1 times [2022-11-18 20:01:34,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:34,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242493403] [2022-11-18 20:01:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:34,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:34,407 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:34,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 20:01:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:01:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:34,620 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:34,625 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:34,731 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_621 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_621) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:34,775 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_621 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_621) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:34,850 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:34,866 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:01:34,866 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 13 not checked. [2022-11-18 20:01:34,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:35,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242493403] [2022-11-18 20:01:35,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242493403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119394611] [2022-11-18 20:01:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:01:35,167 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:01:35,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-18 20:01:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:35,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:01:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:35,447 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:35,459 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:35,551 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_679 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_679) |c_#length|)))) is different from true [2022-11-18 20:01:35,587 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_679 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_679) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:35,669 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:35,686 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:01:35,687 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 13 not checked. [2022-11-18 20:01:35,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:37,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119394611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:37,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:37,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-18 20:01:37,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750034123] [2022-11-18 20:01:37,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:01:37,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:01:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-18 20:01:37,900 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 20:01:38,027 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_679 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_679) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_621 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_621) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:01:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:38,359 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-11-18 20:01:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:01:38,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 31 [2022-11-18 20:01:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:38,361 INFO L225 Difference]: With dead ends: 137 [2022-11-18 20:01:38,362 INFO L226 Difference]: Without dead ends: 137 [2022-11-18 20:01:38,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=5, NotChecked=90, Total=182 [2022-11-18 20:01:38,363 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:38,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 66 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 348 Unchecked, 0.3s Time] [2022-11-18 20:01:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-18 20:01:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-11-18 20:01:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 87 states have (on average 1.367816091954023) internal successors, (119), 102 states have internal predecessors, (119), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (31), 21 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-18 20:01:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-18 20:01:38,371 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 31 [2022-11-18 20:01:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:38,371 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-18 20:01:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-18 20:01:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-18 20:01:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:01:38,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:38,373 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-18 20:01:38,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:38,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:38,777 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:01:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1805515892, now seen corresponding path program 2 times [2022-11-18 20:01:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886829476] [2022-11-18 20:01:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:38,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:38,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:01:38,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 20:01:39,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:01:39,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:01:39,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:39,115 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:01:39,144 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_782 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_782))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:01:39,169 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:01:39,345 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:01:39,346 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-18 20:01:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 23 not checked. [2022-11-18 20:01:39,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:41,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886829476] [2022-11-18 20:01:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886829476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323768395] [2022-11-18 20:01:41,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:41,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:01:41,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:01:41,488 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:01:41,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-18 20:01:41,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:01:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179159898] [2022-11-18 20:01:41,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:41,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:01:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:01:41,804 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:01:41,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 1 [2022-11-18 20:01:41,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:01:42,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:01:42,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:42,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:01:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:42,058 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_984 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_984) |c_#valid|)) is different from true [2022-11-18 20:01:42,073 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_985 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_985))) is different from true [2022-11-18 20:01:44,178 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_984 (_ BitVec 1)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_984) v_nondet_tree_~n~0.base_66 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:01:46,280 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_984 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_984) v_nondet_tree_~n~0.base_66 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= .cse0 |c_#valid|)))) is different from true [2022-11-18 20:01:46,354 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-18 20:01:46,354 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-18 20:01:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 26 not checked. [2022-11-18 20:01:46,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:46,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179159898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:01:46,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:46,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 12 [2022-11-18 20:01:46,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671697217] [2022-11-18 20:01:46,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:46,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:01:46,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:46,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:01:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=53, Unknown=9, NotChecked=114, Total=210 [2022-11-18 20:01:46,585 INFO L87 Difference]: Start difference. First operand 133 states and 168 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-18 20:01:53,025 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_985 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_985)))) is different from true [2022-11-18 20:01:57,075 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_984 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_984) v_nondet_tree_~n~0.base_66 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= .cse0 |c_#valid|))))) is different from true [2022-11-18 20:02:00,860 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_782 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_55 (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_782) v_nondet_tree_~n~0.base_55 (_ bv1 1))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_984 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_66 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_984) v_nondet_tree_~n~0.base_66 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= .cse0 |c_#valid|))))) is different from true [2022-11-18 20:02:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:00,867 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2022-11-18 20:02:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:02:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) Word has length 49 [2022-11-18 20:02:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:00,869 INFO L225 Difference]: With dead ends: 139 [2022-11-18 20:02:00,869 INFO L226 Difference]: Without dead ends: 139 [2022-11-18 20:02:00,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=55, Invalid=76, Unknown=15, NotChecked=234, Total=380 [2022-11-18 20:02:00,870 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:00,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 582 Unchecked, 0.2s Time] [2022-11-18 20:02:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-18 20:02:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-11-18 20:02:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.3626373626373627) internal successors, (124), 105 states have internal predecessors, (124), 18 states have call successors, (18), 9 states have call predecessors, (18), 13 states have return successors, (38), 23 states have call predecessors, (38), 18 states have call successors, (38) [2022-11-18 20:02:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2022-11-18 20:02:00,878 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 49 [2022-11-18 20:02:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:00,879 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2022-11-18 20:02:00,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (11), 7 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-18 20:02:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2022-11-18 20:02:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:02:00,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:00,880 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-18 20:02:00,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:01,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:01,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:01,287 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 82737513, now seen corresponding path program 2 times [2022-11-18 20:02:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685377495] [2022-11-18 20:02:01,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:01,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:01,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:01,289 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:01,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 20:02:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:02:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:01,681 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:01,687 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:01,757 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1119 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1119))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:01,795 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:02:01,862 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1119 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_77 v_ArrVal_1119) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_77)))) is different from true [2022-11-18 20:02:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:01,989 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:02:01,990 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:02:02,012 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:02:02,012 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 91 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 30 not checked. [2022-11-18 20:02:02,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:02,412 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685377495] [2022-11-18 20:02:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685377495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1990167082] [2022-11-18 20:02:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:02,413 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:02:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:02:02,414 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:02:02,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-18 20:02:02,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:02,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:02,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:02:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:02,983 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:02,988 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:03,027 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1254 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1254))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:03,114 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_88 (_ BitVec 32)) (v_ArrVal_1254 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_88)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_88 v_ArrVal_1254) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-18 20:02:03,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:03,235 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:02:03,235 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:02:03,259 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:02:03,259 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 91 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 30 not checked. [2022-11-18 20:02:03,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:06,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1990167082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:06,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:06,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-18 20:02:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704589105] [2022-11-18 20:02:06,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:02:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:02:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=43, Unknown=5, NotChecked=80, Total=156 [2022-11-18 20:02:06,212 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:02:06,679 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_88 (_ BitVec 32)) (v_ArrVal_1254 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_88)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_88 v_ArrVal_1254) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_1119 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_77 v_ArrVal_1119) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_77))))) is different from true [2022-11-18 20:02:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:06,685 INFO L93 Difference]: Finished difference Result 151 states and 199 transitions. [2022-11-18 20:02:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:02:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 63 [2022-11-18 20:02:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:06,687 INFO L225 Difference]: With dead ends: 151 [2022-11-18 20:02:06,687 INFO L226 Difference]: Without dead ends: 151 [2022-11-18 20:02:06,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=43, Invalid=64, Unknown=7, NotChecked=126, Total=240 [2022-11-18 20:02:06,688 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:06,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 445 Unchecked, 0.3s Time] [2022-11-18 20:02:06,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-18 20:02:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-18 20:02:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.33) internal successors, (133), 115 states have internal predecessors, (133), 20 states have call successors, (20), 10 states have call predecessors, (20), 15 states have return successors, (46), 25 states have call predecessors, (46), 20 states have call successors, (46) [2022-11-18 20:02:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2022-11-18 20:02:06,696 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 63 [2022-11-18 20:02:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:06,697 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2022-11-18 20:02:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:02:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2022-11-18 20:02:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:02:06,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:06,698 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:06,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-18 20:02:06,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-18 20:02:07,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:07,104 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1738803102, now seen corresponding path program 2 times [2022-11-18 20:02:07,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:07,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784144355] [2022-11-18 20:02:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:07,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:07,106 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:07,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-18 20:02:07,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:02:07,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:02:07,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:08,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 20:02:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:02:08,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:08,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784144355] [2022-11-18 20:02:08,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784144355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:08,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:08,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-18 20:02:08,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945199603] [2022-11-18 20:02:08,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:08,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:02:08,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:02:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:02:08,658 INFO L87 Difference]: Start difference. First operand 151 states and 199 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 20:02:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:12,174 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2022-11-18 20:02:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:02:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 39 [2022-11-18 20:02:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:12,178 INFO L225 Difference]: With dead ends: 155 [2022-11-18 20:02:12,178 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 20:02:12,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:02:12,179 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:12,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 130 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 716 Invalid, 0 Unknown, 16 Unchecked, 3.2s Time] [2022-11-18 20:02:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 20:02:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-11-18 20:02:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.31) internal successors, (131), 115 states have internal predecessors, (131), 20 states have call successors, (20), 10 states have call predecessors, (20), 15 states have return successors, (46), 25 states have call predecessors, (46), 20 states have call successors, (46) [2022-11-18 20:02:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2022-11-18 20:02:12,188 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 39 [2022-11-18 20:02:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:12,188 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2022-11-18 20:02:12,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-18 20:02:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2022-11-18 20:02:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:02:12,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:12,190 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-18 20:02:12,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:12,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:12,409 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:12,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1450953460, now seen corresponding path program 3 times [2022-11-18 20:02:12,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:12,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125141870] [2022-11-18 20:02:12,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:12,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:12,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:12,412 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:12,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 20:02:12,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:02:12,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:02:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:12,851 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:12,891 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1417 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1417))))) is different from true [2022-11-18 20:02:12,930 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1417 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1417)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:12,960 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1418 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1418) |c_#valid|)) is different from true [2022-11-18 20:02:13,036 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:02:15,180 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:02:15,181 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-18 20:02:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 24 not checked. [2022-11-18 20:02:15,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:17,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125141870] [2022-11-18 20:02:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125141870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1747421028] [2022-11-18 20:02:17,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:02:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:02:17,364 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:02:17,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-18 20:02:17,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:02:17,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:02:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:17,977 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1524 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1524))) is different from true [2022-11-18 20:02:18,011 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1525 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1525) |c_#valid|)) is different from true [2022-11-18 20:02:22,340 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-18 20:02:22,340 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-18 20:02:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 42 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 12 not checked. [2022-11-18 20:02:22,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:22,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1747421028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:22,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:22,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-11-18 20:02:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534965408] [2022-11-18 20:02:22,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:22,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:02:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:02:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=74, Unknown=9, NotChecked=138, Total=272 [2022-11-18 20:02:22,809 INFO L87 Difference]: Start difference. First operand 151 states and 197 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 8 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-18 20:02:27,001 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1524 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1524))) (exists ((v_ArrVal_1525 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1525) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1417 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1417)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_1418 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1418) |c_#valid|))) is different from true [2022-11-18 20:02:27,005 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_1418 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1418) |c_#valid|)))) (exists ((v_ArrVal_1524 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1524))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1417 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1417)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:02:27,022 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_1418 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1418) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-18 20:02:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:30,078 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2022-11-18 20:02:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:02:30,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 8 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2022-11-18 20:02:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:30,081 INFO L225 Difference]: With dead ends: 157 [2022-11-18 20:02:30,081 INFO L226 Difference]: Without dead ends: 157 [2022-11-18 20:02:30,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=75, Invalid=103, Unknown=14, NotChecked=270, Total=462 [2022-11-18 20:02:30,082 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 724 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:30,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 131 Invalid, 0 Unknown, 724 Unchecked, 0.3s Time] [2022-11-18 20:02:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-18 20:02:30,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2022-11-18 20:02:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 118 states have internal predecessors, (135), 20 states have call successors, (20), 10 states have call predecessors, (20), 16 states have return successors, (55), 26 states have call predecessors, (55), 20 states have call successors, (55) [2022-11-18 20:02:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 210 transitions. [2022-11-18 20:02:30,093 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 210 transitions. Word has length 49 [2022-11-18 20:02:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:30,093 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 210 transitions. [2022-11-18 20:02:30,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 8 states have call successors, (11), 2 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-18 20:02:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 210 transitions. [2022-11-18 20:02:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 20:02:30,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:30,095 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-18 20:02:30,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:30,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:30,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:30,501 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash -556103673, now seen corresponding path program 3 times [2022-11-18 20:02:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:30,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851719003] [2022-11-18 20:02:30,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:30,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:30,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:30,504 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:30,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-18 20:02:30,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:02:30,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:31,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:02:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:31,045 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:31,051 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:31,131 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1627 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1627) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:31,174 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1627 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1627) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:31,203 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:02:31,271 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (v_ArrVal_1627 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1627) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:31,354 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:02:31,354 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:02:31,369 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:02:31,370 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 30 not checked. [2022-11-18 20:02:31,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:33,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:33,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851719003] [2022-11-18 20:02:33,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851719003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:33,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288556982] [2022-11-18 20:02:33,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:33,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:02:33,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:02:33,794 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:02:33,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-18 20:02:34,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:02:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:02:34,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:34,453 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:34,460 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:34,885 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1727 (_ BitVec 32)) (v_ArrVal_1729 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1727) |c_nondet_tree_#t~ret9.base| v_ArrVal_1729)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:34,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1727 (_ BitVec 32)) (v_ArrVal_1729 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1727) |nondet_tree_#t~ret9.base| v_ArrVal_1729) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:34,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-18 20:02:34,986 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:02:34,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-18 20:02:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 26 refuted. 4 times theorem prover too weak. 7 trivial. 10 not checked. [2022-11-18 20:02:34,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:39,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288556982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:39,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:39,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2022-11-18 20:02:39,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583865961] [2022-11-18 20:02:39,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:39,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:02:39,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:02:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=129, Unknown=9, NotChecked=162, Total=342 [2022-11-18 20:02:39,589 INFO L87 Difference]: Start difference. First operand 155 states and 210 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:02:40,304 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1727 (_ BitVec 32)) (v_ArrVal_1729 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1727) |c_nondet_tree_#t~ret9.base| v_ArrVal_1729)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (v_ArrVal_1627 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1627) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:02:40,316 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1727 (_ BitVec 32)) (v_ArrVal_1729 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1727) |nondet_tree_#t~ret9.base| v_ArrVal_1729) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32)) (v_ArrVal_1627 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1627) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:02:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:40,398 INFO L93 Difference]: Finished difference Result 155 states and 209 transitions. [2022-11-18 20:02:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:02:40,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-11-18 20:02:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:40,400 INFO L225 Difference]: With dead ends: 155 [2022-11-18 20:02:40,400 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 20:02:40,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=75, Invalid=250, Unknown=13, NotChecked=312, Total=650 [2022-11-18 20:02:40,401 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 691 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:40,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 88 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 691 Unchecked, 0.3s Time] [2022-11-18 20:02:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 20:02:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-11-18 20:02:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 102 states have (on average 1.303921568627451) internal successors, (133), 118 states have internal predecessors, (133), 20 states have call successors, (20), 10 states have call predecessors, (20), 16 states have return successors, (55), 25 states have call predecessors, (55), 20 states have call successors, (55) [2022-11-18 20:02:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2022-11-18 20:02:40,409 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 43 [2022-11-18 20:02:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:40,410 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2022-11-18 20:02:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 8 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-18 20:02:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2022-11-18 20:02:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:02:40,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:40,412 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:02:40,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:40,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-18 20:02:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:40,818 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1915391076, now seen corresponding path program 2 times [2022-11-18 20:02:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335186148] [2022-11-18 20:02:40,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:40,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:40,820 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-18 20:02:41,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:41,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:02:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:41,391 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:41,397 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:41,463 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1888 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1888) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:41,500 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:02:41,572 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1888 (_ BitVec 32)) (v_nondet_tree_~n~0.base_156 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1888) v_nondet_tree_~n~0.base_156 (_ bv12 32))))) is different from true [2022-11-18 20:02:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:41,714 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:02:41,714 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:02:41,739 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:02:41,739 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 105 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 40 not checked. [2022-11-18 20:02:41,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:44,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335186148] [2022-11-18 20:02:44,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335186148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:44,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54305805] [2022-11-18 20:02:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:44,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:02:44,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:02:44,575 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:02:44,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-18 20:02:45,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:45,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:45,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:02:45,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:45,234 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:45,242 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:45,281 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2040 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2040) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:45,363 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_167 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2040 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_167 v_ArrVal_2040) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_167) (_ bv0 1)))) is different from true [2022-11-18 20:02:45,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:45,476 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:02:45,476 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:02:45,491 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:02:45,491 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 105 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 40 not checked. [2022-11-18 20:02:45,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:49,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54305805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:49,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:49,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-18 20:02:49,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561040562] [2022-11-18 20:02:49,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:49,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:02:49,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:49,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:02:49,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=82, Unknown=7, NotChecked=110, Total=240 [2022-11-18 20:02:49,568 INFO L87 Difference]: Start difference. First operand 154 states and 208 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 20:02:50,099 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1888 (_ BitVec 32)) (v_nondet_tree_~n~0.base_156 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1888) v_nondet_tree_~n~0.base_156 (_ bv12 32))))) (exists ((v_nondet_tree_~n~0.base_167 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2040 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_167 v_ArrVal_2040) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_167) (_ bv0 1))))) is different from true [2022-11-18 20:02:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:50,120 INFO L93 Difference]: Finished difference Result 171 states and 244 transitions. [2022-11-18 20:02:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:02:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) Word has length 69 [2022-11-18 20:02:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:50,122 INFO L225 Difference]: With dead ends: 171 [2022-11-18 20:02:50,122 INFO L226 Difference]: Without dead ends: 171 [2022-11-18 20:02:50,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=60, Invalid=110, Unknown=10, NotChecked=162, Total=342 [2022-11-18 20:02:50,123 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:50,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 82 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 482 Unchecked, 0.4s Time] [2022-11-18 20:02:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-18 20:02:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-18 20:02:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 114 states have (on average 1.2719298245614035) internal successors, (145), 131 states have internal predecessors, (145), 24 states have call successors, (24), 10 states have call predecessors, (24), 17 states have return successors, (75), 29 states have call predecessors, (75), 24 states have call successors, (75) [2022-11-18 20:02:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 244 transitions. [2022-11-18 20:02:50,132 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 244 transitions. Word has length 69 [2022-11-18 20:02:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:50,133 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 244 transitions. [2022-11-18 20:02:50,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 5 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 20:02:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 244 transitions. [2022-11-18 20:02:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:02:50,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:50,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:50,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:50,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-18 20:02:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:50,541 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash -612022781, now seen corresponding path program 1 times [2022-11-18 20:02:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:50,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292855077] [2022-11-18 20:02:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:50,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:50,543 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-18 20:02:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:02:50,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:50,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:02:50,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:02:51,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 20:02:51,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 20:02:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:02:51,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:02:51,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:51,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292855077] [2022-11-18 20:02:51,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292855077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:51,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:51,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2022-11-18 20:02:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617695762] [2022-11-18 20:02:51,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:02:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:02:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:02:51,751 INFO L87 Difference]: Start difference. First operand 171 states and 244 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:02:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:52,795 INFO L93 Difference]: Finished difference Result 213 states and 304 transitions. [2022-11-18 20:02:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:02:52,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-18 20:02:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:52,801 INFO L225 Difference]: With dead ends: 213 [2022-11-18 20:02:52,801 INFO L226 Difference]: Without dead ends: 213 [2022-11-18 20:02:52,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:02:52,802 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 35 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:52,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 892 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 258 Invalid, 0 Unknown, 31 Unchecked, 0.7s Time] [2022-11-18 20:02:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-18 20:02:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 200. [2022-11-18 20:02:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 135 states have (on average 1.2592592592592593) internal successors, (170), 154 states have internal predecessors, (170), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 32 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:02:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 293 transitions. [2022-11-18 20:02:52,815 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 293 transitions. Word has length 38 [2022-11-18 20:02:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:52,815 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 293 transitions. [2022-11-18 20:02:52,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:02:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 293 transitions. [2022-11-18 20:02:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:02:52,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:52,817 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:02:52,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:53,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:53,030 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:02:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash 917383077, now seen corresponding path program 2 times [2022-11-18 20:02:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:53,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065885304] [2022-11-18 20:02:53,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:53,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:53,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:53,032 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:02:53,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-18 20:02:53,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:53,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:02:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:53,420 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:02:53,471 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2188 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2188))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:53,501 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2188 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2188)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:02:53,524 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:02:53,676 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:02:53,676 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-18 20:02:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 31 not checked. [2022-11-18 20:02:53,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:55,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065885304] [2022-11-18 20:02:55,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065885304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:02:55,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728034272] [2022-11-18 20:02:55,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:55,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:02:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:02:55,857 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:02:55,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-18 20:02:56,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:02:56,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950855617] [2022-11-18 20:02:56,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:56,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:02:56,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:02:56,335 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:02:56,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 1 [2022-11-18 20:02:56,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:02:56,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:56,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:02:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:56,680 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2402 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2402) |c_#valid|)) is different from true [2022-11-18 20:02:56,714 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2403 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2403) |c_#valid|)) is different from true [2022-11-18 20:02:58,800 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2402 (_ BitVec 1)) (v_nondet_tree_~n~0.base_192 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2402) v_nondet_tree_~n~0.base_192 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:03:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:03:00,950 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-18 20:03:00,951 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-18 20:03:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 20 not checked. [2022-11-18 20:03:00,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:01,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950855617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:01,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:01,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2022-11-18 20:03:01,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966354070] [2022-11-18 20:03:01,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:01,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:03:01,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:01,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:03:01,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=76, Unknown=9, NotChecked=138, Total=272 [2022-11-18 20:03:01,414 INFO L87 Difference]: Start difference. First operand 200 states and 293 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 20:03:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:14,324 INFO L93 Difference]: Finished difference Result 202 states and 295 transitions. [2022-11-18 20:03:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:03:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 55 [2022-11-18 20:03:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:14,327 INFO L225 Difference]: With dead ends: 202 [2022-11-18 20:03:14,327 INFO L226 Difference]: Without dead ends: 202 [2022-11-18 20:03:14,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=66, Invalid=102, Unknown=12, NotChecked=162, Total=342 [2022-11-18 20:03:14,328 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 53 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:14,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 59 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 604 Unchecked, 0.2s Time] [2022-11-18 20:03:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-18 20:03:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-11-18 20:03:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 136 states have (on average 1.2647058823529411) internal successors, (172), 154 states have internal predecessors, (172), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 33 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:03:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 295 transitions. [2022-11-18 20:03:14,341 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 295 transitions. Word has length 55 [2022-11-18 20:03:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:14,342 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 295 transitions. [2022-11-18 20:03:14,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 8 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-18 20:03:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 295 transitions. [2022-11-18 20:03:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:03:14,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:14,344 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:03:14,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:14,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:14,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:03:14,761 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:03:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:14,761 INFO L85 PathProgramCache]: Analyzing trace with hash 917383078, now seen corresponding path program 3 times [2022-11-18 20:03:14,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:14,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125096158] [2022-11-18 20:03:14,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:03:14,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:14,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:14,763 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:03:14,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-18 20:03:15,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:03:15,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:03:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:15,264 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:15,404 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2514 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2514))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:15,449 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2514 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2514)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:15,481 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:03:15,554 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2514 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_206 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2514) v_nondet_tree_~n~0.base_206 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:15,633 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:03:15,633 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:03:15,652 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:15,652 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 40 not checked. [2022-11-18 20:03:15,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:18,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125096158] [2022-11-18 20:03:18,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125096158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:18,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397380705] [2022-11-18 20:03:18,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:03:18,059 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:03:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:03:18,060 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:03:18,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-18 20:03:18,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:03:18,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:18,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:03:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:18,782 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:18,969 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2625 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2625) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:19,192 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2625 (_ BitVec 32)) (v_ArrVal_2627 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2625) |c_nondet_tree_#t~ret9.base| v_ArrVal_2627) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:19,214 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2625 (_ BitVec 32)) (v_ArrVal_2627 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2625) |nondet_tree_#t~ret9.base| v_ArrVal_2627) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:19,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:19,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-18 20:03:19,315 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:03:19,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-18 20:03:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 19 not checked. [2022-11-18 20:03:19,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:22,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [397380705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:22,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:22,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2022-11-18 20:03:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169499322] [2022-11-18 20:03:22,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:22,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:03:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:03:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=109, Unknown=9, NotChecked=182, Total=342 [2022-11-18 20:03:22,228 INFO L87 Difference]: Start difference. First operand 201 states and 295 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 9 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 20:03:22,879 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2514 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_206 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2514) v_nondet_tree_~n~0.base_206 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2625 (_ BitVec 32)) (v_ArrVal_2627 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2625) |c_nondet_tree_#t~ret9.base| v_ArrVal_2627) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:03:22,887 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2514 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_206 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2514) v_nondet_tree_~n~0.base_206 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2625 (_ BitVec 32)) (v_ArrVal_2627 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2625) |nondet_tree_#t~ret9.base| v_ArrVal_2627) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:03:22,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:22,969 INFO L93 Difference]: Finished difference Result 202 states and 296 transitions. [2022-11-18 20:03:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:03:22,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 9 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) Word has length 55 [2022-11-18 20:03:22,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:22,972 INFO L225 Difference]: With dead ends: 202 [2022-11-18 20:03:22,972 INFO L226 Difference]: Without dead ends: 202 [2022-11-18 20:03:22,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=70, Invalid=195, Unknown=11, NotChecked=324, Total=600 [2022-11-18 20:03:22,973 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:22,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 85 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 782 Unchecked, 0.3s Time] [2022-11-18 20:03:22,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-18 20:03:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-11-18 20:03:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 154 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 34 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:03:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2022-11-18 20:03:22,985 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 55 [2022-11-18 20:03:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:22,985 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2022-11-18 20:03:22,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 9 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 8 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-18 20:03:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2022-11-18 20:03:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:03:22,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:22,997 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:03:23,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:23,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:23,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:23,406 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:03:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1719860631, now seen corresponding path program 3 times [2022-11-18 20:03:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:23,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117968854] [2022-11-18 20:03:23,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:03:23,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:23,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:23,408 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:03:23,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-18 20:03:23,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:03:23,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:03:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:23,797 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2761 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2761))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:23,834 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2761 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2761)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:23,937 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:03:23,937 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 7 not checked. [2022-11-18 20:03:23,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:24,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117968854] [2022-11-18 20:03:24,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117968854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:24,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321276479] [2022-11-18 20:03:24,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:03:24,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:03:24,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:03:24,127 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:03:24,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-18 20:03:24,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:03:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:03:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:24,710 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2886 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2886) |c_#valid|)) is different from true [2022-11-18 20:03:24,760 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:03:24,808 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:03:24,808 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 7 not checked. [2022-11-18 20:03:24,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:24,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321276479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:24,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:24,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-11-18 20:03:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563497196] [2022-11-18 20:03:24,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:24,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:03:24,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:03:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=4, NotChecked=44, Total=90 [2022-11-18 20:03:24,958 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-18 20:03:27,009 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_2886 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2886) |c_#valid|)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2761 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2761))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:03:27,013 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2761 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2761)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|))) is different from true [2022-11-18 20:03:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:29,340 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2022-11-18 20:03:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:03:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 59 [2022-11-18 20:03:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:29,343 INFO L225 Difference]: With dead ends: 204 [2022-11-18 20:03:29,343 INFO L226 Difference]: Without dead ends: 204 [2022-11-18 20:03:29,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=34, Invalid=38, Unknown=8, NotChecked=102, Total=182 [2022-11-18 20:03:29,344 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:29,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 53 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 417 Unchecked, 0.3s Time] [2022-11-18 20:03:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-18 20:03:29,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-11-18 20:03:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 154 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 34 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:03:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2022-11-18 20:03:29,354 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 59 [2022-11-18 20:03:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:29,354 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2022-11-18 20:03:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 6 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-18 20:03:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2022-11-18 20:03:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 20:03:29,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:29,356 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:03:29,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:29,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-18 20:03:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:29,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:03:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1950147294, now seen corresponding path program 4 times [2022-11-18 20:03:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869155063] [2022-11-18 20:03:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:03:29,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:29,778 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:03:29,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-18 20:03:30,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:03:30,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:03:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:30,363 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:30,372 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:30,460 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_3040 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3040))))) is different from true [2022-11-18 20:03:30,520 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3040 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3040)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:30,611 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:30,627 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:30,627 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:30,697 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3041 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3041))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:30,759 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3041 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3041)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:30,788 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:03:30,859 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3041 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_234 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_234 v_ArrVal_3041) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_234)))) is different from true [2022-11-18 20:03:30,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:30,950 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:03:30,951 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:03:30,974 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:30,974 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 86 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 81 not checked. [2022-11-18 20:03:30,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:33,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:33,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869155063] [2022-11-18 20:03:33,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869155063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:33,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [309233487] [2022-11-18 20:03:33,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:03:33,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:03:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:03:33,550 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:03:33,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-18 20:03:34,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:03:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:03:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:34,436 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:34,444 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:34,502 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3199 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3199) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:34,554 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3199 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3199) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:34,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:34,643 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:34,662 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:34,663 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:34,711 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3200 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3200) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:34,750 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3200 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3200) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:34,842 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3200 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_246 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_246 v_ArrVal_3200) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_246) (_ bv0 1)))) is different from true [2022-11-18 20:03:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:34,934 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:03:34,934 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:03:34,951 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:34,951 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 84 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 81 not checked. [2022-11-18 20:03:34,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:37,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [309233487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:37,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:37,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-18 20:03:37,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876281024] [2022-11-18 20:03:37,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:37,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:03:37,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:03:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=59, Unknown=13, NotChecked=264, Total=380 [2022-11-18 20:03:37,333 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 17 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 11 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-18 20:03:37,477 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3040 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3040)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3200 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3200) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3041 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3041)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3199 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3199) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:03:37,482 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3040 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3040)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3199 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3199) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:03:37,671 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3200 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_246 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_246 v_ArrVal_3200) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_246) (_ bv0 1)))) (exists ((v_ArrVal_3041 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_234 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_234 v_ArrVal_3041) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_234))))) is different from true [2022-11-18 20:03:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:37,826 INFO L93 Difference]: Finished difference Result 206 states and 312 transitions. [2022-11-18 20:03:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:03:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 11 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) Word has length 73 [2022-11-18 20:03:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:37,830 INFO L225 Difference]: With dead ends: 206 [2022-11-18 20:03:37,830 INFO L226 Difference]: Without dead ends: 206 [2022-11-18 20:03:37,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=57, Invalid=73, Unknown=16, NotChecked=406, Total=552 [2022-11-18 20:03:37,832 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1057 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:37,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 64 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 1057 Unchecked, 0.3s Time] [2022-11-18 20:03:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-18 20:03:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2022-11-18 20:03:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 154 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 34 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:03:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2022-11-18 20:03:37,844 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 73 [2022-11-18 20:03:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:37,845 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2022-11-18 20:03:37,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 11 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-18 20:03:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2022-11-18 20:03:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 20:03:37,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:37,847 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 8, 7, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:03:37,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-18 20:03:38,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:38,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:38,255 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:03:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1330788268, now seen corresponding path program 5 times [2022-11-18 20:03:38,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010865470] [2022-11-18 20:03:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:03:38,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:38,258 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:03:38,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-18 20:03:39,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 20:03:39,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:03:39,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:03:39,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:39,984 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:39,991 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:40,064 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3398 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3398) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:40,113 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3398 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3398) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:40,186 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:40,201 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:40,201 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:40,256 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3399 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3399))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:03:40,298 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3399 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3399)))) is different from true [2022-11-18 20:03:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:40,401 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:40,414 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:03:40,415 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:03:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 181 proven. 6 refuted. 0 times theorem prover too weak. 106 trivial. 40 not checked. [2022-11-18 20:03:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:40,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:40,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010865470] [2022-11-18 20:03:40,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010865470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:40,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2093294922] [2022-11-18 20:03:40,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:03:40,740 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:03:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:03:40,743 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:03:40,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-18 20:03:43,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:03:43,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226341540] [2022-11-18 20:03:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:03:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:03:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:03:43,272 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:03:43,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-18 20:03:43,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 1 [2022-11-18 20:06:05,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 20:06:05,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:06:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:05,658 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:05,666 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:05,720 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3785 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3785))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:05,763 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3785 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3785)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:05,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:06:05,857 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:05,876 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:06:05,876 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:05,943 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3786 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3786) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:05,998 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3786 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3786) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:06:06,127 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:06,146 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:06:06,147 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 181 proven. 6 refuted. 0 times theorem prover too weak. 106 trivial. 40 not checked. [2022-11-18 20:06:06,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:06,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226341540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:06,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:06:06,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-11-18 20:06:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313699233] [2022-11-18 20:06:06,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:06,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:06:06,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:06:06,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:06:06,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=46, Unknown=8, NotChecked=152, Total=240 [2022-11-18 20:06:06,407 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:06:06,515 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3398 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3398) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3399 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3399)))) (exists ((v_ArrVal_3785 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3785)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3786 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3786) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:06:06,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:06,928 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2022-11-18 20:06:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:06:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) Word has length 87 [2022-11-18 20:06:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:06,931 INFO L225 Difference]: With dead ends: 204 [2022-11-18 20:06:06,931 INFO L226 Difference]: Without dead ends: 204 [2022-11-18 20:06:06,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=57, Unknown=9, NotChecked=198, Total=306 [2022-11-18 20:06:06,932 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 753 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:06,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 57 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 131 Invalid, 0 Unknown, 753 Unchecked, 0.4s Time] [2022-11-18 20:06:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-18 20:06:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-11-18 20:06:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 154 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 34 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:06:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2022-11-18 20:06:06,946 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 87 [2022-11-18 20:06:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:06,946 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2022-11-18 20:06:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 10 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (14), 6 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-18 20:06:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2022-11-18 20:06:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:06:06,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:06,949 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:06:07,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:07,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:07,369 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:06:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1219497203, now seen corresponding path program 4 times [2022-11-18 20:06:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:06:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955135] [2022-11-18 20:06:07,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:06:07,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:06:07,372 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:06:07,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-18 20:06:08,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:06:08,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:06:08,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:08,029 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:08,086 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3872 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3872) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:08,114 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:06:08,322 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-18 20:06:08,323 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 22 treesize of output 38 [2022-11-18 20:06:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 28 not checked. [2022-11-18 20:06:08,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:10,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:06:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955135] [2022-11-18 20:06:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624893975] [2022-11-18 20:06:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:06:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:06:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:06:10,556 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:06:10,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-18 20:06:11,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:06:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:06:11,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:11,306 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:11,345 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3960 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3960))) is different from true [2022-11-18 20:06:11,409 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3960 (_ BitVec 1)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3960) v_nondet_tree_~n~0.base_278 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:06:13,504 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3960 (_ BitVec 1)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3960) v_nondet_tree_~n~0.base_278 (_ bv1 1)) |c_#valid|) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)))) is different from true [2022-11-18 20:06:13,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:06:13,591 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-18 20:06:13,592 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-11-18 20:06:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 38 not checked. [2022-11-18 20:06:13,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624893975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:13,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:06:13,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2022-11-18 20:06:13,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853661459] [2022-11-18 20:06:13,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:13,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:06:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:06:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:06:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=41, Unknown=7, NotChecked=80, Total=156 [2022-11-18 20:06:13,884 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-18 20:06:26,494 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3960 (_ BitVec 1)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3960) v_nondet_tree_~n~0.base_278 (_ bv1 1)) |c_#valid|) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-18 20:06:32,855 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3872 (_ BitVec 1)) (v_nondet_tree_~n~0.base_267 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3872) v_nondet_tree_~n~0.base_267 (_ bv1 1))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3960 (_ BitVec 1)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3960) v_nondet_tree_~n~0.base_278 (_ bv1 1)) |c_#valid|) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-18 20:06:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:35,083 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2022-11-18 20:06:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:06:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 45 [2022-11-18 20:06:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:35,086 INFO L225 Difference]: With dead ends: 204 [2022-11-18 20:06:35,086 INFO L226 Difference]: Without dead ends: 204 [2022-11-18 20:06:35,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=58, Invalid=84, Unknown=18, NotChecked=182, Total=342 [2022-11-18 20:06:35,087 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 543 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:35,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 66 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 543 Unchecked, 0.3s Time] [2022-11-18 20:06:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-18 20:06:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-11-18 20:06:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 154 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 34 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:06:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2022-11-18 20:06:35,101 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 45 [2022-11-18 20:06:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:35,102 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2022-11-18 20:06:35,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-18 20:06:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2022-11-18 20:06:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:06:35,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:35,104 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-18 20:06:35,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:35,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:35,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:35,511 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:06:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash -327654422, now seen corresponding path program 6 times [2022-11-18 20:06:35,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:06:35,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482095492] [2022-11-18 20:06:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:06:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:06:35,515 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:06:35,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-18 20:06:36,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:06:36,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:06:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:36,582 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:36,590 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:36,748 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4089 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4089) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:36,792 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:06:36,877 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4089 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_289 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4089) v_nondet_tree_~n~0.base_289 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:06:37,033 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:06:37,033 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:06:37,062 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:06:37,062 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 40 not checked. [2022-11-18 20:06:37,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:37,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:06:37,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482095492] [2022-11-18 20:06:37,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482095492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:37,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1748815653] [2022-11-18 20:06:37,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:06:37,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:06:37,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:06:37,597 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:06:37,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-18 20:06:38,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:06:38,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030784421] [2022-11-18 20:06:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:06:38,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:38,537 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:38,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 1 [2022-11-18 20:06:38,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-18 20:06:49,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:06:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:49,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:06:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:49,945 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:50,169 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4340 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4340) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:50,211 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4340 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4340) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:06:50,318 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4340 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_300 (_ BitVec 32)) (v_ArrVal_4338 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_300)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_300 v_ArrVal_4338) nondet_tree_~n~0.base v_ArrVal_4340)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_300 (_ bv1 1)) nondet_tree_~n~0.base) (_ bv0 1)))) is different from true [2022-11-18 20:06:50,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:06:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:06:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:06:50,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-18 20:06:50,552 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-18 20:06:50,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-18 20:06:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 65 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 37 not checked. [2022-11-18 20:06:50,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:53,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030784421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:53,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:06:53,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 13 [2022-11-18 20:06:53,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57526715] [2022-11-18 20:06:53,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:53,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:06:53,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:06:53,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:06:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=89, Unknown=7, NotChecked=138, Total=272 [2022-11-18 20:06:53,562 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 10 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-18 20:06:53,944 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((v_ArrVal_4340 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4340) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:06:54,336 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4340 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_300 (_ BitVec 32)) (v_ArrVal_4338 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_300)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_300 v_ArrVal_4338) nondet_tree_~n~0.base v_ArrVal_4340)) (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_300 (_ bv1 1)) nondet_tree_~n~0.base) (_ bv0 1)))) (exists ((v_ArrVal_4089 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_289 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4089) v_nondet_tree_~n~0.base_289 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:06:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:54,343 INFO L93 Difference]: Finished difference Result 203 states and 297 transitions. [2022-11-18 20:06:54,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:06:54,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 10 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 59 [2022-11-18 20:06:54,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:54,354 INFO L225 Difference]: With dead ends: 203 [2022-11-18 20:06:54,354 INFO L226 Difference]: Without dead ends: 203 [2022-11-18 20:06:54,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=69, Invalid=135, Unknown=10, NotChecked=248, Total=462 [2022-11-18 20:06:54,364 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 85 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:54,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 76 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 170 Invalid, 0 Unknown, 662 Unchecked, 0.4s Time] [2022-11-18 20:06:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-18 20:06:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-11-18 20:06:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2627737226277371) internal successors, (173), 154 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 22 states have return successors, (96), 34 states have call predecessors, (96), 27 states have call successors, (96) [2022-11-18 20:06:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 296 transitions. [2022-11-18 20:06:54,381 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 296 transitions. Word has length 59 [2022-11-18 20:06:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:54,382 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 296 transitions. [2022-11-18 20:06:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.230769230769231) internal successors, (55), 14 states have internal predecessors, (55), 10 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-18 20:06:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 296 transitions. [2022-11-18 20:06:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:06:54,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:54,384 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:54,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:54,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:54,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:54,804 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:06:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1293875203, now seen corresponding path program 2 times [2022-11-18 20:06:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:06:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979049609] [2022-11-18 20:06:54,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:06:54,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:06:54,806 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:06:54,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-18 20:06:55,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:06:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:06:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:55,288 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:06:55,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:06:55,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:06:55,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-18 20:06:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:55,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:56,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:06:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979049609] [2022-11-18 20:06:56,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979049609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:56,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:06:56,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2022-11-18 20:06:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091726241] [2022-11-18 20:06:56,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:06:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:06:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:06:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:06:56,904 INFO L87 Difference]: Start difference. First operand 202 states and 296 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-18 20:07:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:01,527 INFO L93 Difference]: Finished difference Result 224 states and 321 transitions. [2022-11-18 20:07:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:07:01,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 45 [2022-11-18 20:07:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:01,530 INFO L225 Difference]: With dead ends: 224 [2022-11-18 20:07:01,530 INFO L226 Difference]: Without dead ends: 224 [2022-11-18 20:07:01,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:07:01,531 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 111 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:01,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 245 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1582 Invalid, 0 Unknown, 55 Unchecked, 3.9s Time] [2022-11-18 20:07:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-18 20:07:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 210. [2022-11-18 20:07:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.2847222222222223) internal successors, (185), 160 states have internal predecessors, (185), 29 states have call successors, (29), 13 states have call predecessors, (29), 21 states have return successors, (93), 36 states have call predecessors, (93), 29 states have call successors, (93) [2022-11-18 20:07:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 307 transitions. [2022-11-18 20:07:01,547 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 307 transitions. Word has length 45 [2022-11-18 20:07:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:01,547 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 307 transitions. [2022-11-18 20:07:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-18 20:07:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 307 transitions. [2022-11-18 20:07:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:07:01,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:01,549 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:01,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:01,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:01,763 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:07:01,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1293875202, now seen corresponding path program 1 times [2022-11-18 20:07:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:07:01,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338344561] [2022-11-18 20:07:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:01,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:01,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:07:01,765 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:07:01,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-18 20:07:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:02,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:07:02,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:02,280 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:02,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:07:02,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:07:02,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-18 20:07:02,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 20:07:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 20:07:03,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 20:07:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:07:03,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:07:10,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:07:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338344561] [2022-11-18 20:07:10,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338344561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:07:10,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:07:10,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-18 20:07:10,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119518579] [2022-11-18 20:07:10,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:10,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:07:10,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:07:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:07:10,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:07:10,363 INFO L87 Difference]: Start difference. First operand 210 states and 307 transitions. Second operand has 30 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-18 20:07:23,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:23,531 INFO L93 Difference]: Finished difference Result 253 states and 365 transitions. [2022-11-18 20:07:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:07:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2022-11-18 20:07:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:23,534 INFO L225 Difference]: With dead ends: 253 [2022-11-18 20:07:23,535 INFO L226 Difference]: Without dead ends: 251 [2022-11-18 20:07:23,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:07:23,536 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 200 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:23,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 459 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2488 Invalid, 0 Unknown, 82 Unchecked, 11.2s Time] [2022-11-18 20:07:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-18 20:07:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2022-11-18 20:07:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 168 states have (on average 1.2797619047619047) internal successors, (215), 183 states have internal predecessors, (215), 34 states have call successors, (34), 16 states have call predecessors, (34), 23 states have return successors, (98), 41 states have call predecessors, (98), 34 states have call successors, (98) [2022-11-18 20:07:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 347 transitions. [2022-11-18 20:07:23,550 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 347 transitions. Word has length 45 [2022-11-18 20:07:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:23,550 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 347 transitions. [2022-11-18 20:07:23,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.28) internal successors, (57), 22 states have internal predecessors, (57), 9 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-18 20:07:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 347 transitions. [2022-11-18 20:07:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 20:07:23,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:23,553 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-18 20:07:23,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:23,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:23,767 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:07:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1585502, now seen corresponding path program 7 times [2022-11-18 20:07:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:07:23,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004554198] [2022-11-18 20:07:23,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:07:23,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:23,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:07:23,770 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:07:23,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-18 20:07:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:07:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:24,604 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:24,616 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:24,711 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4657 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4657) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:24,764 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4657 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4657) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:24,796 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:07:24,871 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_335 (_ BitVec 32)) (v_ArrVal_4657 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4657) v_nondet_tree_~n~0.base_335 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:07:24,999 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:07:24,999 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:07:25,025 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:07:25,025 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 122 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 40 not checked. [2022-11-18 20:07:25,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:29,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:07:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004554198] [2022-11-18 20:07:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004554198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254920810] [2022-11-18 20:07:29,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:07:29,896 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:07:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:07:29,897 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:07:29,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-18 20:07:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:07:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:31,157 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:31,165 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:31,236 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4815 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4815) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:31,290 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4815 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4815) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:31,426 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4815 (_ BitVec 32)) (v_nondet_tree_~n~0.base_346 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4815) v_nondet_tree_~n~0.base_346 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:07:31,548 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-18 20:07:31,548 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-18 20:07:31,569 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:07:31,570 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 122 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 40 not checked. [2022-11-18 20:07:31,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:36,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [254920810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:36,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:07:36,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 20:07:36,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660449203] [2022-11-18 20:07:36,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:36,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:07:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:07:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:07:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=84, Unknown=10, NotChecked=168, Total=306 [2022-11-18 20:07:36,943 INFO L87 Difference]: Start difference. First operand 241 states and 347 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-18 20:07:37,087 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4657 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4657) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4815 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4815) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:07:37,359 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_335 (_ BitVec 32)) (v_ArrVal_4657 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4657) v_nondet_tree_~n~0.base_335 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4815 (_ BitVec 32)) (v_nondet_tree_~n~0.base_346 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4815) v_nondet_tree_~n~0.base_346 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:07:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:37,547 INFO L93 Difference]: Finished difference Result 257 states and 395 transitions. [2022-11-18 20:07:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:07:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 73 [2022-11-18 20:07:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:37,551 INFO L225 Difference]: With dead ends: 257 [2022-11-18 20:07:37,551 INFO L226 Difference]: Without dead ends: 257 [2022-11-18 20:07:37,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=65, Invalid=114, Unknown=13, NotChecked=270, Total=462 [2022-11-18 20:07:37,552 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 696 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:37,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 63 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 696 Unchecked, 0.4s Time] [2022-11-18 20:07:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-18 20:07:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 246. [2022-11-18 20:07:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 171 states have (on average 1.2748538011695907) internal successors, (218), 187 states have internal predecessors, (218), 36 states have call successors, (36), 16 states have call predecessors, (36), 23 states have return successors, (106), 42 states have call predecessors, (106), 36 states have call successors, (106) [2022-11-18 20:07:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 360 transitions. [2022-11-18 20:07:37,567 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 360 transitions. Word has length 73 [2022-11-18 20:07:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:37,568 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 360 transitions. [2022-11-18 20:07:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-18 20:07:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 360 transitions. [2022-11-18 20:07:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 20:07:37,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:37,571 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:07:37,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:37,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:37,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:07:37,979 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:07:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:37,980 INFO L85 PathProgramCache]: Analyzing trace with hash -637360370, now seen corresponding path program 4 times [2022-11-18 20:07:37,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:07:37,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912004913] [2022-11-18 20:07:37,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:07:37,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:07:37,981 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:07:37,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-18 20:07:38,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:07:38,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:07:38,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:07:38,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:38,834 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:38,873 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5001 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5001) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:38,898 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5002 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5002))) is different from true [2022-11-18 20:07:38,912 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) is different from true [2022-11-18 20:07:38,971 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_357 (_ BitVec 32)) (v_ArrVal_5002 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5002) v_nondet_tree_~n~0.base_357 (_ bv1 1)))) is different from true [2022-11-18 20:07:39,024 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_357 (_ BitVec 32)) (v_ArrVal_5002 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5002) v_nondet_tree_~n~0.base_357 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= .cse0 |c_#valid|)))) is different from true [2022-11-18 20:07:41,368 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-18 20:07:41,369 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 39 treesize of output 66 [2022-11-18 20:07:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 55 not checked. [2022-11-18 20:07:41,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:42,476 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:07:42,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912004913] [2022-11-18 20:07:42,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912004913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:42,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1925243033] [2022-11-18 20:07:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:07:42,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:07:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:07:42,479 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:07:42,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-18 20:07:43,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:07:43,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:07:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:07:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:43,967 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:07:43,985 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5194 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5194) |c_#valid|)) is different from true [2022-11-18 20:07:44,016 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5195 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5195))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:07:50,186 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5194 (_ BitVec 1)) (v_ArrVal_5195 (_ BitVec 1)) (v_nondet_tree_~n~0.base_379 (_ BitVec 32)) (v_nondet_tree_~n~0.base_378 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5194))) (and (= (store (store .cse0 v_nondet_tree_~n~0.base_378 v_ArrVal_5195) v_nondet_tree_~n~0.base_379 (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_378))))) is different from true [2022-11-18 20:07:58,405 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5194 (_ BitVec 1)) (v_ArrVal_5195 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_379 (_ BitVec 32)) (v_nondet_tree_~n~0.base_378 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5194))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_378 v_ArrVal_5195) v_nondet_tree_~n~0.base_379 (_ bv1 1)))) (and (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_378)) (= .cse0 |c_#valid|))))) is different from true [2022-11-18 20:07:58,648 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-18 20:07:58,649 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 115 treesize of output 148 [2022-11-18 20:07:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 55 not checked. [2022-11-18 20:07:58,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1925243033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:59,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:07:59,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-18 20:07:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570265300] [2022-11-18 20:07:59,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:59,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:07:59,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:07:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:07:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=53, Unknown=16, NotChecked=198, Total=306 [2022-11-18 20:07:59,257 INFO L87 Difference]: Start difference. First operand 246 states and 360 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-18 20:08:53,810 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5194 (_ BitVec 1)) (v_ArrVal_5195 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_379 (_ BitVec 32)) (v_nondet_tree_~n~0.base_378 (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5194))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_378 v_ArrVal_5195) v_nondet_tree_~n~0.base_379 (_ bv1 1)))) (and (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_378)) (= .cse0 |c_#valid|))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_357 (_ BitVec 32)) (v_nondet_tree_~n~0.base_358 (_ BitVec 32)) (v_ArrVal_5002 (_ BitVec 1)) (v_ArrVal_5001 (_ BitVec 1))) (let ((.cse2 (store (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5001) v_nondet_tree_~n~0.base_358 v_ArrVal_5002) v_nondet_tree_~n~0.base_357 (_ bv1 1)))) (and (= (bvadd (select .cse2 v_nondet_tree_~n~0.base_358) (_ bv1 1)) (_ bv0 1)) (= |c_#valid| .cse2) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))))) is different from true [2022-11-18 20:08:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:53,876 INFO L93 Difference]: Finished difference Result 263 states and 408 transitions. [2022-11-18 20:08:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:08:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) Word has length 87 [2022-11-18 20:08:53,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:53,879 INFO L225 Difference]: With dead ends: 263 [2022-11-18 20:08:53,879 INFO L226 Difference]: Without dead ends: 263 [2022-11-18 20:08:53,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 165 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=62, Invalid=100, Unknown=34, NotChecked=310, Total=506 [2022-11-18 20:08:53,880 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:53,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 105 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 1149 Unchecked, 0.4s Time] [2022-11-18 20:08:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-18 20:08:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 254. [2022-11-18 20:08:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 177 states have (on average 1.271186440677966) internal successors, (225), 192 states have internal predecessors, (225), 37 states have call successors, (37), 16 states have call predecessors, (37), 24 states have return successors, (128), 45 states have call predecessors, (128), 37 states have call successors, (128) [2022-11-18 20:08:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 390 transitions. [2022-11-18 20:08:53,896 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 390 transitions. Word has length 87 [2022-11-18 20:08:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:53,897 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 390 transitions. [2022-11-18 20:08:53,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 9 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-18 20:08:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 390 transitions. [2022-11-18 20:08:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 20:08:53,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:53,900 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1] [2022-11-18 20:08:53,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:54,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:54,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:08:54,323 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:08:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:54,324 INFO L85 PathProgramCache]: Analyzing trace with hash -126663525, now seen corresponding path program 4 times [2022-11-18 20:08:54,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:08:54,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852648474] [2022-11-18 20:08:54,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:08:54,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:08:54,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:08:54,327 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:08:54,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-18 20:08:55,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:08:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:08:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:55,162 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:08:55,171 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:08:55,295 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5359 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5359) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:08:55,415 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)) is different from true [2022-11-18 20:08:55,569 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_399 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5360) v_nondet_tree_~n~0.base_399 (_ bv12 32)) |c_#length|) (bvule (_ bv8 32) (select |c_#length| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:08:55,620 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_399 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5360) v_nondet_tree_~n~0.base_399 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv8 32) (select .cse0 nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:08:55,688 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_399 (_ BitVec 32)) (v_nondet_tree_~n~0.base_400 (_ BitVec 32)) (v_ArrVal_5359 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_400 v_ArrVal_5359) nondet_tree_~n~0.base v_ArrVal_5360) v_nondet_tree_~n~0.base_399 (_ bv12 32)))) (and (= .cse0 |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_400)) (bvule (_ bv8 32) (select .cse0 nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:08:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:08:56,000 INFO L321 Elim1Store]: treesize reduction 59, result has 34.4 percent of original size [2022-11-18 20:08:56,001 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 30 treesize of output 51 [2022-11-18 20:08:56,036 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:08:56,037 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:08:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 9 refuted. 1 times theorem prover too weak. 45 trivial. 62 not checked. [2022-11-18 20:08:56,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:59,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:08:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852648474] [2022-11-18 20:08:59,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852648474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:59,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [484080115] [2022-11-18 20:08:59,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:08:59,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:08:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:08:59,056 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:08:59,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-18 20:09:00,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:09:00,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:09:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:00,576 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:09:00,584 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:09:00,643 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5524 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5524))) (exists ((v_ArrVal_5525 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5525) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:09:00,692 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_5526 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5526))))) is different from true [2022-11-18 20:09:00,808 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_420 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5526 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5526) v_nondet_tree_~n~0.base_420 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-18 20:09:00,907 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5525 (_ BitVec 1)) (v_nondet_tree_~n~0.base_420 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_421 (_ BitVec 32)) (v_ArrVal_5526 (_ BitVec 32)) (v_ArrVal_5524 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_421 v_ArrVal_5525) nondet_tree_~n~0.base) (_ bv0 1)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_421) (_ bv0 1)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_421 v_ArrVal_5524) nondet_tree_~n~0.base v_ArrVal_5526) v_nondet_tree_~n~0.base_420 (_ bv12 32))))) is different from true [2022-11-18 20:09:01,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:09:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:09:01,194 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-18 20:09:01,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 35 [2022-11-18 20:09:01,283 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-18 20:09:01,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-18 20:09:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 66 not checked. [2022-11-18 20:09:01,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:11,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [484080115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:11,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:09:11,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-11-18 20:09:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209766040] [2022-11-18 20:09:11,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:11,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:09:11,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:09:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:09:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=103, Unknown=17, NotChecked=252, Total=420 [2022-11-18 20:09:11,241 INFO L87 Difference]: Start difference. First operand 254 states and 390 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 14 states have internal predecessors, (56), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-18 20:09:17,295 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_420 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5526 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5526) v_nondet_tree_~n~0.base_420 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_399 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5360) v_nondet_tree_~n~0.base_399 (_ bv12 32)) |c_#length|) (bvule (_ bv8 32) (select |c_#length| nondet_tree_~n~0.base))))) is different from true [2022-11-18 20:09:17,303 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_420 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5526 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5526) v_nondet_tree_~n~0.base_420 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_399 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5360) v_nondet_tree_~n~0.base_399 (_ bv12 32)))) (and (= .cse0 |c_#length|) (bvule (_ bv8 32) (select .cse0 nondet_tree_~n~0.base)))))) is different from true [2022-11-18 20:09:17,314 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5360 (_ BitVec 32)) (v_nondet_tree_~n~0.base_399 (_ BitVec 32)) (v_nondet_tree_~n~0.base_400 (_ BitVec 32)) (v_ArrVal_5359 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_400 v_ArrVal_5359) nondet_tree_~n~0.base v_ArrVal_5360) v_nondet_tree_~n~0.base_399 (_ bv12 32)))) (and (= .cse0 |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_400)) (bvule (_ bv8 32) (select .cse0 nondet_tree_~n~0.base))))) (exists ((v_ArrVal_5525 (_ BitVec 1)) (v_nondet_tree_~n~0.base_420 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_421 (_ BitVec 32)) (v_ArrVal_5526 (_ BitVec 32)) (v_ArrVal_5524 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_421 v_ArrVal_5525) nondet_tree_~n~0.base) (_ bv0 1)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_421) (_ bv0 1)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_421 v_ArrVal_5524) nondet_tree_~n~0.base v_ArrVal_5526) v_nondet_tree_~n~0.base_420 (_ bv12 32)))))) is different from true [2022-11-18 20:09:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:09:17,357 INFO L93 Difference]: Finished difference Result 278 states and 435 transitions. [2022-11-18 20:09:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:09:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 14 states have internal predecessors, (56), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) Word has length 73 [2022-11-18 20:09:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:09:17,361 INFO L225 Difference]: With dead ends: 278 [2022-11-18 20:09:17,362 INFO L226 Difference]: Without dead ends: 278 [2022-11-18 20:09:17,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=78, Invalid=156, Unknown=24, NotChecked=444, Total=702 [2022-11-18 20:09:17,363 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:09:17,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 108 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 1135 Unchecked, 0.3s Time] [2022-11-18 20:09:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-18 20:09:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 274. [2022-11-18 20:09:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 191 states have (on average 1.2513089005235603) internal successors, (239), 207 states have internal predecessors, (239), 40 states have call successors, (40), 17 states have call predecessors, (40), 27 states have return successors, (149), 49 states have call predecessors, (149), 40 states have call successors, (149) [2022-11-18 20:09:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 428 transitions. [2022-11-18 20:09:17,382 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 428 transitions. Word has length 73 [2022-11-18 20:09:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:09:17,382 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 428 transitions. [2022-11-18 20:09:17,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 14 states have internal predecessors, (56), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-18 20:09:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 428 transitions. [2022-11-18 20:09:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:09:17,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:09:17,385 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1] [2022-11-18 20:09:17,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:17,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-18 20:09:17,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt [2022-11-18 20:09:17,807 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:09:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:09:17,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1266609479, now seen corresponding path program 5 times [2022-11-18 20:09:17,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:09:17,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134862809] [2022-11-18 20:09:17,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:09:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:09:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:09:17,810 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:09:17,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-18 20:09:20,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 20:09:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:09:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:09:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:09:20,351 INFO L350 Elim1Store]: Elim1 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 [2022-11-18 20:09:20,432 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_5761 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5761))))) is different from true [2022-11-18 20:09:20,464 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5762 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5762))) is different from true [2022-11-18 20:09:20,481 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5763 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5763) |c_#valid|)) is different from true [2022-11-18 20:09:20,768 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_441 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5762 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5762) v_nondet_tree_~n~0.base_441 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= |c_#valid| .cse0)))) is different from true [2022-11-18 20:09:26,864 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-18 20:09:26,864 INFO L350 Elim1Store]: Elim1 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 5 case distinctions, treesize of input 39 treesize of output 66 [2022-11-18 20:09:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 239 proven. 41 refuted. 0 times theorem prover too weak. 135 trivial. 40 not checked. [2022-11-18 20:09:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:27,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:09:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134862809] [2022-11-18 20:09:27,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134862809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:09:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120549585] [2022-11-18 20:09:27,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:09:27,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-18 20:09:27,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 [2022-11-18 20:09:27,523 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-18 20:09:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-18 20:09:28,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:09:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050522260] [2022-11-18 20:09:28,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:09:28,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:09:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:09:28,636 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:09:28,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-18 20:09:28,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc64d87-a67e-444a-882c-754b65d889b9/bin/uautomizer-TMbwUNV5ro/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 1