./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN --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-6b4ec56 [2022-11-20 11:27:22,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:27:22,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:27:22,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:27:22,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:27:22,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:27:22,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:27:22,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:27:22,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:27:22,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:27:22,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:27:22,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:27:22,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:27:22,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:27:22,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:27:22,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:27:22,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:27:22,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:27:22,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:27:22,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:27:22,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:27:22,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:27:22,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:27:22,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:27:22,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:27:22,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:27:22,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:27:22,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:27:22,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:27:22,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:27:22,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:27:22,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:27:22,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:27:22,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:27:22,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:27:22,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:27:22,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:27:22,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:27:22,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:27:22,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:27:22,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:27:22,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-20 11:27:22,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:27:22,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:27:22,579 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:27:22,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:27:22,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:27:22,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:27:22,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:27:22,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:27:22,582 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:27:22,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:27:22,583 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:27:22,583 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:27:22,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:27:22,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:27:22,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:27:22,585 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:27:22,585 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:27:22,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:27:22,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:27:22,586 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:27:22,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:27:22,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:27:22,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:27:22,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:27:22,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:27:22,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:27:22,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:27:22,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:27:22,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:27:22,588 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_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-11-20 11:27:22,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:27:22,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:27:22,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:27:22,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:27:22,921 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:27:22,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/verifythis/tree_max.c [2022-11-20 11:27:26,129 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:27:26,363 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:27:26,364 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/sv-benchmarks/c/verifythis/tree_max.c [2022-11-20 11:27:26,372 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data/38b1ac4c5/5f5dd4e8686a4954a7118476a861037a/FLAG8b819b8c2 [2022-11-20 11:27:26,391 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data/38b1ac4c5/5f5dd4e8686a4954a7118476a861037a [2022-11-20 11:27:26,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:27:26,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:27:26,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:27:26,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:27:26,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:27:26,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:27:26" (1/1) ... [2022-11-20 11:27:26,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d9f3b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:26, skipping insertion in model container [2022-11-20 11:27:26,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:27:26" (1/1) ... [2022-11-20 11:27:26,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:27:26,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:27:26,648 WARN L237 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_73a4cafa-5cef-4894-9e07-6780cada0b1e/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-20 11:27:26,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:27:26,707 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) [2022-11-20 11:27:26,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f1eb3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:26, skipping insertion in model container [2022-11-20 11:27:26,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:27:26,709 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 11:27:26,711 INFO L158 Benchmark]: Toolchain (without parser) took 314.09ms. Allocated memory is still 144.7MB. Free memory was 105.1MB in the beginning and 117.3MB in the end (delta: -12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:27:26,711 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:27:26,712 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.05ms. Allocated memory is still 144.7MB. Free memory was 104.5MB in the beginning and 117.3MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:27:26,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 109.1MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.05ms. Allocated memory is still 144.7MB. Free memory was 104.5MB in the beginning and 117.3MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN --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-6b4ec56 [2022-11-20 11:27:29,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:27:29,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:27:29,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:27:29,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:27:29,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:27:29,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:27:29,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:27:29,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:27:29,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:27:29,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:27:29,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:27:29,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:27:29,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:27:29,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:27:29,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:27:29,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:27:29,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:27:29,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:27:29,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:27:29,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:27:29,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:27:29,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:27:29,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:27:29,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:27:29,316 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:27:29,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:27:29,318 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:27:29,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:27:29,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:27:29,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:27:29,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:27:29,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:27:29,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:27:29,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:27:29,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:27:29,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:27:29,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:27:29,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:27:29,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:27:29,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:27:29,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-11-20 11:27:29,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:27:29,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:27:29,381 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:27:29,381 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:27:29,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:27:29,382 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:27:29,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:27:29,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:27:29,384 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:27:29,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:27:29,384 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:27:29,384 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:27:29,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:27:29,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:27:29,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:27:29,386 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:27:29,386 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:27:29,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:27:29,387 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:27:29,387 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 11:27:29,387 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 11:27:29,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:27:29,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:27:29,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:27:29,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:27:29,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:27:29,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:27:29,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:27:29,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:27:29,390 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 11:27:29,390 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 11:27:29,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 11:27:29,391 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_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-11-20 11:27:29,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:27:29,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:27:29,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:27:29,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:27:29,810 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:27:29,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/verifythis/tree_max.c [2022-11-20 11:27:32,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:27:33,203 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:27:33,204 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/sv-benchmarks/c/verifythis/tree_max.c [2022-11-20 11:27:33,213 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data/597c7ca7e/497f1c5a720b410ca1883c77125454c8/FLAG27b3d0e4e [2022-11-20 11:27:33,230 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/data/597c7ca7e/497f1c5a720b410ca1883c77125454c8 [2022-11-20 11:27:33,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:27:33,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:27:33,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:27:33,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:27:33,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:27:33,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482a9309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33, skipping insertion in model container [2022-11-20 11:27:33,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:27:33,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:27:33,443 WARN L237 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_73a4cafa-5cef-4894-9e07-6780cada0b1e/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-20 11:27:33,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:27:33,478 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 11:27:33,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:27:33,485 WARN L237 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_73a4cafa-5cef-4894-9e07-6780cada0b1e/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-20 11:27:33,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:27:33,510 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:27:33,529 WARN L237 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_73a4cafa-5cef-4894-9e07-6780cada0b1e/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2022-11-20 11:27:33,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:27:33,555 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:27:33,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33 WrapperNode [2022-11-20 11:27:33,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:27:33,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:27:33,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:27:33,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:27:33,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,594 INFO L138 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 37 [2022-11-20 11:27:33,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:27:33,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:27:33,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:27:33,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:27:33,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:27:33,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:27:33,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:27:33,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:27:33,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (1/1) ... [2022-11-20 11:27:33,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:27:33,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:27:33,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:27:33,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:27:33,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:27:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 11:27:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:27:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 11:27:33,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:27:33,701 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-20 11:27:33,701 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-20 11:27:33,701 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-20 11:27:33,701 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-20 11:27:33,701 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-20 11:27:33,701 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-20 11:27:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:27:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:27:33,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:27:33,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 11:27:33,788 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:27:33,791 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:27:34,193 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:27:34,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:27:34,202 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 11:27:34,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:27:34 BoogieIcfgContainer [2022-11-20 11:27:34,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:27:34,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:27:34,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:27:34,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:27:34,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:27:33" (1/3) ... [2022-11-20 11:27:34,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c18cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:27:34, skipping insertion in model container [2022-11-20 11:27:34,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:27:33" (2/3) ... [2022-11-20 11:27:34,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c18cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:27:34, skipping insertion in model container [2022-11-20 11:27:34,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:27:34" (3/3) ... [2022-11-20 11:27:34,215 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-11-20 11:27:34,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:27:34,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-20 11:27:34,333 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:27:34,341 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;@1e3acb82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:27:34,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 11:27:34,353 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) [2022-11-20 11:27:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:27:34,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:34,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:27:34,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash 73597257, now seen corresponding path program 1 times [2022-11-20 11:27:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:34,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862343178] [2022-11-20 11:27:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:34,395 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 [2022-11-20 11:27:34,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:34,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:34,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:27:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:34,607 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 [2022-11-20 11:27:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:34,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:34,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:34,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862343178] [2022-11-20 11:27:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862343178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:34,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:34,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:27:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208220533] [2022-11-20 11:27:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:27:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:27:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:27:34,680 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) [2022-11-20 11:27:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:34,846 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-11-20 11:27:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:27:34,849 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 [2022-11-20 11:27:34,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:34,861 INFO L225 Difference]: With dead ends: 73 [2022-11-20 11:27:34,861 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 11:27:34,863 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 [2022-11-20 11:27:34,867 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 [2022-11-20 11:27:34,870 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] [2022-11-20 11:27:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 11:27:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-20 11:27:34,926 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) [2022-11-20 11:27:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-11-20 11:27:34,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 5 [2022-11-20 11:27:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:34,931 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-11-20 11:27:34,932 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) [2022-11-20 11:27:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-11-20 11:27:34,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:27:34,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:34,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:27:34,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Ended with exit code 0 [2022-11-20 11:27:35,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:35,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:35,138 INFO L85 PathProgramCache]: Analyzing trace with hash 73597258, now seen corresponding path program 1 times [2022-11-20 11:27:35,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:35,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259782697] [2022-11-20 11:27:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:35,139 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 [2022-11-20 11:27:35,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:35,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:35,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:27:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:35,246 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 [2022-11-20 11:27:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:35,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:35,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:35,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259782697] [2022-11-20 11:27:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259782697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:35,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:35,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:27:35,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787831828] [2022-11-20 11:27:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:27:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:27:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:27:35,269 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) [2022-11-20 11:27:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:35,403 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-11-20 11:27:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:27:35,406 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 [2022-11-20 11:27:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:35,407 INFO L225 Difference]: With dead ends: 68 [2022-11-20 11:27:35,407 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 11:27:35,408 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 [2022-11-20 11:27:35,410 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 [2022-11-20 11:27:35,410 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] [2022-11-20 11:27:35,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 11:27:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-20 11:27:35,434 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) [2022-11-20 11:27:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-11-20 11:27:35,440 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 5 [2022-11-20 11:27:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:35,441 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-11-20 11:27:35,441 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) [2022-11-20 11:27:35,442 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-11-20 11:27:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:27:35,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:35,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:35,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:35,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash -345289291, now seen corresponding path program 1 times [2022-11-20 11:27:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:35,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554249825] [2022-11-20 11:27:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:35,681 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 [2022-11-20 11:27:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:35,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:35,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:35,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:27:35,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:35,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:35,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:35,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554249825] [2022-11-20 11:27:35,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554249825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:35,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:35,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:27:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670160255] [2022-11-20 11:27:35,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:35,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:27:35,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:27:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:27:35,961 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) [2022-11-20 11:27:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:36,190 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-11-20 11:27:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:27:36,191 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 [2022-11-20 11:27:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:36,193 INFO L225 Difference]: With dead ends: 83 [2022-11-20 11:27:36,193 INFO L226 Difference]: Without dead ends: 83 [2022-11-20 11:27:36,193 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 [2022-11-20 11:27:36,195 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 [2022-11-20 11:27:36,196 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] [2022-11-20 11:27:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-20 11:27:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2022-11-20 11:27:36,207 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) [2022-11-20 11:27:36,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2022-11-20 11:27:36,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 11 [2022-11-20 11:27:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:36,210 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2022-11-20 11:27:36,210 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) [2022-11-20 11:27:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2022-11-20 11:27:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:27:36,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:36,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:36,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:36,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:36,428 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:36,429 INFO L85 PathProgramCache]: Analyzing trace with hash -159104294, now seen corresponding path program 1 times [2022-11-20 11:27:36,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:36,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280533151] [2022-11-20 11:27:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:36,431 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 [2022-11-20 11:27:36,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:36,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:36,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:36,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:27:36,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:36,529 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 [2022-11-20 11:27:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:36,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:36,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:36,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280533151] [2022-11-20 11:27:36,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280533151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:36,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:36,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:27:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110377185] [2022-11-20 11:27:36,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:36,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:27:36,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:27:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:27:36,597 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) [2022-11-20 11:27:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:36,950 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-20 11:27:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:27:36,952 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 [2022-11-20 11:27:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:36,953 INFO L225 Difference]: With dead ends: 80 [2022-11-20 11:27:36,953 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 11:27:36,953 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 [2022-11-20 11:27:36,955 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:36,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 38 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:27:36,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 11:27:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-11-20 11:27:36,963 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) [2022-11-20 11:27:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-11-20 11:27:36,965 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 11 [2022-11-20 11:27:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:36,978 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-11-20 11:27:36,979 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) [2022-11-20 11:27:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-11-20 11:27:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:27:36,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:36,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:37,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:37,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:37,193 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash -159104293, now seen corresponding path program 1 times [2022-11-20 11:27:37,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:37,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861674065] [2022-11-20 11:27:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:37,196 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 [2022-11-20 11:27:37,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:37,197 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:37,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:27:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:37,291 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 [2022-11-20 11:27:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:37,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:37,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:37,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861674065] [2022-11-20 11:27:37,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861674065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:37,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:37,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:27:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158608906] [2022-11-20 11:27:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:37,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:27:37,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:27:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:27:37,352 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) [2022-11-20 11:27:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:37,701 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-11-20 11:27:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:27:37,702 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 [2022-11-20 11:27:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:37,703 INFO L225 Difference]: With dead ends: 84 [2022-11-20 11:27:37,704 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 11:27:37,704 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 [2022-11-20 11:27:37,705 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 [2022-11-20 11:27:37,705 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] [2022-11-20 11:27:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 11:27:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-11-20 11:27:37,714 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) [2022-11-20 11:27:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-11-20 11:27:37,716 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 11 [2022-11-20 11:27:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:37,717 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-11-20 11:27:37,717 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) [2022-11-20 11:27:37,717 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-11-20 11:27:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:27:37,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:37,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:37,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Ended with exit code 0 [2022-11-20 11:27:37,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:37,933 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1041946460, now seen corresponding path program 1 times [2022-11-20 11:27:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702064278] [2022-11-20 11:27:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:37,935 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 [2022-11-20 11:27:37,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:37,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:37,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:27:37,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:38,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:38,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702064278] [2022-11-20 11:27:38,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702064278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:38,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:38,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:27:38,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845351580] [2022-11-20 11:27:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:38,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:27:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:27:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:27:38,127 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) [2022-11-20 11:27:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:38,248 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-11-20 11:27:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:27:38,248 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 [2022-11-20 11:27:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:38,249 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:27:38,250 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:27:38,250 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 [2022-11-20 11:27:38,251 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 [2022-11-20 11:27:38,251 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] [2022-11-20 11:27:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:27:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-11-20 11:27:38,257 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) [2022-11-20 11:27:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-11-20 11:27:38,259 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 17 [2022-11-20 11:27:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:38,259 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-11-20 11:27:38,260 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) [2022-11-20 11:27:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-11-20 11:27:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:27:38,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:38,261 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] [2022-11-20 11:27:38,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:38,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -868680531, now seen corresponding path program 1 times [2022-11-20 11:27:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:38,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859273804] [2022-11-20 11:27:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:38,473 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 [2022-11-20 11:27:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:38,475 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:38,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:27:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:27:38,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:38,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859273804] [2022-11-20 11:27:38,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859273804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:38,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:38,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:27:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524300324] [2022-11-20 11:27:38,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:38,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:27:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:27:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:27:38,607 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) [2022-11-20 11:27:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:38,867 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-11-20 11:27:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:27:38,870 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 [2022-11-20 11:27:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:38,871 INFO L225 Difference]: With dead ends: 89 [2022-11-20 11:27:38,871 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 11:27:38,871 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 [2022-11-20 11:27:38,872 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:38,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 48 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:27:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 11:27:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-20 11:27:38,877 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) [2022-11-20 11:27:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-20 11:27:38,878 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 20 [2022-11-20 11:27:38,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:38,878 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-20 11:27:38,878 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) [2022-11-20 11:27:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-20 11:27:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:27:38,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:38,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:38,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:39,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:39,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -360622958, now seen corresponding path program 1 times [2022-11-20 11:27:39,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:39,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034007918] [2022-11-20 11:27:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:39,082 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 [2022-11-20 11:27:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:39,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:39,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:39,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:27:39,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:39,329 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 [2022-11-20 11:27:39,395 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 [2022-11-20 11:27:39,479 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 [2022-11-20 11:27:39,592 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:27:39,592 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 [2022-11-20 11:27:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-20 11:27:39,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:39,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:39,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034007918] [2022-11-20 11:27:39,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034007918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691979761] [2022-11-20 11:27:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:39,811 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:27:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:27:39,815 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:27:39,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-20 11:27:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:27:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:40,153 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 [2022-11-20 11:27:40,182 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 [2022-11-20 11:27:40,271 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:27:40,272 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 [2022-11-20 11:27:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-20 11:27:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:40,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691979761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:40,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:40,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-20 11:27:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446938817] [2022-11-20 11:27:40,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:40,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:27:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:27:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-20 11:27:40,474 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) [2022-11-20 11:27:42,533 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 [2022-11-20 11:27:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:42,764 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2022-11-20 11:27:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:27:42,765 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 [2022-11-20 11:27:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:42,766 INFO L225 Difference]: With dead ends: 84 [2022-11-20 11:27:42,767 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 11:27:42,767 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 [2022-11-20 11:27:42,768 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:42,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 41 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 272 Unchecked, 0.2s Time] [2022-11-20 11:27:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 11:27:42,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-11-20 11:27:42,774 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) [2022-11-20 11:27:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-11-20 11:27:42,775 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 29 [2022-11-20 11:27:42,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:42,775 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-11-20 11:27:42,775 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) [2022-11-20 11:27:42,775 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-11-20 11:27:42,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:27:42,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:42,776 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:27:42,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:42,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:43,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:43,177 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash -120629553, now seen corresponding path program 1 times [2022-11-20 11:27:43,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:43,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872154285] [2022-11-20 11:27:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:43,179 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 [2022-11-20 11:27:43,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:43,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:43,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:27:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:43,377 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 [2022-11-20 11:27:43,383 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 [2022-11-20 11:27:43,452 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 [2022-11-20 11:27:43,499 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 [2022-11-20 11:27:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:27:43,594 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 [2022-11-20 11:27:43,609 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:27:43,609 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 [2022-11-20 11:27:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-20 11:27:43,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:47,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872154285] [2022-11-20 11:27:47,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872154285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:47,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357969145] [2022-11-20 11:27:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:47,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:27:47,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:27:47,955 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:27:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 11:27:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:27:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:48,259 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 [2022-11-20 11:27:48,267 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 [2022-11-20 11:27:48,324 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 [2022-11-20 11:27:48,368 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 [2022-11-20 11:27:48,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:27:48,457 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 [2022-11-20 11:27:48,471 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:27:48,472 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 [2022-11-20 11:27:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 8 not checked. [2022-11-20 11:27:48,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:48,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357969145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:48,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:48,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 11:27:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632787165] [2022-11-20 11:27:48,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:27:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:27:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=41, Unknown=5, NotChecked=60, Total=132 [2022-11-20 11:27:48,731 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) [2022-11-20 11:27:48,811 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 [2022-11-20 11:27:49,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:49,194 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2022-11-20 11:27:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:27:49,195 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 [2022-11-20 11:27:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:49,196 INFO L225 Difference]: With dead ends: 98 [2022-11-20 11:27:49,196 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:27:49,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=34, Invalid=52, Unknown=6, NotChecked=90, Total=182 [2022-11-20 11:27:49,197 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 [2022-11-20 11:27:49,198 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] [2022-11-20 11:27:49,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:27:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-11-20 11:27:49,205 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) [2022-11-20 11:27:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2022-11-20 11:27:49,212 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 25 [2022-11-20 11:27:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:49,214 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2022-11-20 11:27:49,215 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) [2022-11-20 11:27:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2022-11-20 11:27:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:27:49,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:49,217 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] [2022-11-20 11:27:49,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:49,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:49,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:49,618 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:49,619 INFO L85 PathProgramCache]: Analyzing trace with hash -694882647, now seen corresponding path program 1 times [2022-11-20 11:27:49,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:49,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395769479] [2022-11-20 11:27:49,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:49,619 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 [2022-11-20 11:27:49,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:49,620 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:49,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:27:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:49,733 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 [2022-11-20 11:27:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:49,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:50,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:50,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395769479] [2022-11-20 11:27:50,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395769479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:50,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:50,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-20 11:27:50,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530818049] [2022-11-20 11:27:50,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:27:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:27:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:27:50,087 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) [2022-11-20 11:27:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:50,913 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2022-11-20 11:27:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:27:50,914 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 [2022-11-20 11:27:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:50,915 INFO L225 Difference]: With dead ends: 113 [2022-11-20 11:27:50,915 INFO L226 Difference]: Without dead ends: 113 [2022-11-20 11:27:50,916 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 [2022-11-20 11:27:50,916 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 111 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 84 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 510 Invalid, 0 Unknown, 19 Unchecked, 0.7s Time] [2022-11-20 11:27:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-20 11:27:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2022-11-20 11:27:50,924 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) [2022-11-20 11:27:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-11-20 11:27:50,926 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 25 [2022-11-20 11:27:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:50,927 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-11-20 11:27:50,927 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) [2022-11-20 11:27:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-11-20 11:27:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:27:50,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:50,928 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] [2022-11-20 11:27:50,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:51,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:51,144 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash -694882646, now seen corresponding path program 1 times [2022-11-20 11:27:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:51,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372375324] [2022-11-20 11:27:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:51,145 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 [2022-11-20 11:27:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:51,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:51,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:51,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:27:51,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:51,270 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 [2022-11-20 11:27:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:51,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:27:52,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372375324] [2022-11-20 11:27:52,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372375324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:52,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:52,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:27:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353332472] [2022-11-20 11:27:52,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:27:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:27:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:27:52,967 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) [2022-11-20 11:27:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:55,625 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2022-11-20 11:27:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:27:55,626 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 [2022-11-20 11:27:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:55,628 INFO L225 Difference]: With dead ends: 132 [2022-11-20 11:27:55,628 INFO L226 Difference]: Without dead ends: 132 [2022-11-20 11:27:55,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:27:55,629 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 134 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:55,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 111 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 550 Invalid, 0 Unknown, 23 Unchecked, 2.4s Time] [2022-11-20 11:27:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-20 11:27:55,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 123. [2022-11-20 11:27:55,637 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) [2022-11-20 11:27:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2022-11-20 11:27:55,639 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 25 [2022-11-20 11:27:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:55,639 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2022-11-20 11:27:55,640 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) [2022-11-20 11:27:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2022-11-20 11:27:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:27:55,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:55,641 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] [2022-11-20 11:27:55,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:55,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 986137240, now seen corresponding path program 1 times [2022-11-20 11:27:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:55,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272350118] [2022-11-20 11:27:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:55,856 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 [2022-11-20 11:27:55,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:55,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:55,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:27:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:27:56,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:27:56,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272350118] [2022-11-20 11:27:56,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272350118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:56,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:56,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:27:56,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907347358] [2022-11-20 11:27:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:27:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:27:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:27:56,070 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) [2022-11-20 11:27:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:56,370 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2022-11-20 11:27:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:27:56,371 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 [2022-11-20 11:27:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:56,373 INFO L225 Difference]: With dead ends: 129 [2022-11-20 11:27:56,373 INFO L226 Difference]: Without dead ends: 125 [2022-11-20 11:27:56,373 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 [2022-11-20 11:27:56,374 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 [2022-11-20 11:27:56,375 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] [2022-11-20 11:27:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-20 11:27:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-20 11:27:56,381 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) [2022-11-20 11:27:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2022-11-20 11:27:56,383 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 31 [2022-11-20 11:27:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:56,383 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2022-11-20 11:27:56,383 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) [2022-11-20 11:27:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2022-11-20 11:27:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:27:56,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:56,385 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] [2022-11-20 11:27:56,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:56,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:56,598 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:27:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:56,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1746105865, now seen corresponding path program 1 times [2022-11-20 11:27:56,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:27:56,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838819024] [2022-11-20 11:27:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:56,600 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 [2022-11-20 11:27:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:27:56,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:27:56,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:27:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:27:56,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:56,805 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 [2022-11-20 11:27:56,819 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 [2022-11-20 11:27:56,912 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 [2022-11-20 11:27:56,921 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 [2022-11-20 11:27:57,197 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 [2022-11-20 11:27:57,201 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 [2022-11-20 11:27:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:27:57,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:27:58,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:27:58,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838819024] [2022-11-20 11:27:58,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838819024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:58,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:58,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2022-11-20 11:27:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032559347] [2022-11-20 11:27:58,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:58,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:27:58,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:27:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:27:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:27:58,974 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) [2022-11-20 11:28:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:00,573 INFO L93 Difference]: Finished difference Result 142 states and 181 transitions. [2022-11-20 11:28:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:28:00,574 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 [2022-11-20 11:28:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:00,575 INFO L225 Difference]: With dead ends: 142 [2022-11-20 11:28:00,576 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 11:28:00,576 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 [2022-11-20 11:28:00,577 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 73 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:00,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1102 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 467 Invalid, 0 Unknown, 74 Unchecked, 1.2s Time] [2022-11-20 11:28:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 11:28:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 133. [2022-11-20 11:28:00,585 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) [2022-11-20 11:28:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-20 11:28:00,588 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 31 [2022-11-20 11:28:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:00,588 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-20 11:28:00,589 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) [2022-11-20 11:28:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-20 11:28:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 11:28:00,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:00,590 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:00,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Ended with exit code 0 [2022-11-20 11:28:00,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:00,806 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:00,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash -592661437, now seen corresponding path program 1 times [2022-11-20 11:28:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:00,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411156388] [2022-11-20 11:28:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:00,808 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 [2022-11-20 11:28:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:00,809 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:00,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:01,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:28:01,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:01,093 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 [2022-11-20 11:28:01,144 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 [2022-11-20 11:28:01,182 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 [2022-11-20 11:28:01,289 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:28:01,289 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 [2022-11-20 11:28:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 13 not checked. [2022-11-20 11:28:01,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:01,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411156388] [2022-11-20 11:28:01,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411156388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:01,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548811201] [2022-11-20 11:28:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:01,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:01,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:01,457 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:01,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-20 11:28:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:01,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:28:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:01,780 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 [2022-11-20 11:28:01,817 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 [2022-11-20 11:28:01,870 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:28:01,870 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 [2022-11-20 11:28:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 13 not checked. [2022-11-20 11:28:01,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:02,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1548811201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:02,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:02,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-20 11:28:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989657270] [2022-11-20 11:28:02,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:02,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:28:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:28:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-20 11:28:02,026 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) [2022-11-20 11:28:04,098 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 [2022-11-20 11:28:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:04,331 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2022-11-20 11:28:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:28:04,332 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 [2022-11-20 11:28:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:04,333 INFO L225 Difference]: With dead ends: 135 [2022-11-20 11:28:04,333 INFO L226 Difference]: Without dead ends: 135 [2022-11-20 11:28:04,334 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 [2022-11-20 11:28:04,334 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 [2022-11-20 11:28:04,335 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] [2022-11-20 11:28:04,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-20 11:28:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-11-20 11:28:04,340 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) [2022-11-20 11:28:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-20 11:28:04,342 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 35 [2022-11-20 11:28:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:04,343 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-20 11:28:04,343 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) [2022-11-20 11:28:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-20 11:28:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:28:04,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:04,345 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:04,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-11-20 11:28:04,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:04,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:04,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1427695232, now seen corresponding path program 1 times [2022-11-20 11:28:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:04,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390241784] [2022-11-20 11:28:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:04,749 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 [2022-11-20 11:28:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:04,751 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:04,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:28:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:04,936 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 [2022-11-20 11:28:04,943 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 [2022-11-20 11:28:05,051 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 [2022-11-20 11:28:05,089 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 [2022-11-20 11:28:05,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:05,162 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 [2022-11-20 11:28:05,177 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:28:05,178 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 [2022-11-20 11:28:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 13 not checked. [2022-11-20 11:28:05,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:07,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390241784] [2022-11-20 11:28:07,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390241784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:07,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117448792] [2022-11-20 11:28:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:07,473 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:07,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:07,474 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:07,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-20 11:28:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:07,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:28:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:07,772 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 [2022-11-20 11:28:07,778 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 [2022-11-20 11:28:07,861 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 [2022-11-20 11:28:07,907 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 [2022-11-20 11:28:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:07,978 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 [2022-11-20 11:28:07,993 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:28:07,993 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 [2022-11-20 11:28:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 13 not checked. [2022-11-20 11:28:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2117448792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:08,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:08,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-20 11:28:08,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280962467] [2022-11-20 11:28:08,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:08,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:28:08,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:28:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-20 11:28:08,181 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) [2022-11-20 11:28:08,295 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 [2022-11-20 11:28:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:08,624 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-11-20 11:28:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:28:08,625 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 [2022-11-20 11:28:08,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:08,626 INFO L225 Difference]: With dead ends: 137 [2022-11-20 11:28:08,626 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 11:28:08,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=5, NotChecked=90, Total=182 [2022-11-20 11:28:08,627 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 [2022-11-20 11:28:08,627 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] [2022-11-20 11:28:08,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 11:28:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2022-11-20 11:28:08,642 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) [2022-11-20 11:28:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 168 transitions. [2022-11-20 11:28:08,643 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 168 transitions. Word has length 31 [2022-11-20 11:28:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:08,644 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 168 transitions. [2022-11-20 11:28:08,644 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) [2022-11-20 11:28:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 168 transitions. [2022-11-20 11:28:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 11:28:08,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:08,649 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 11:28:08,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:08,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:09,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:09,053 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1805515892, now seen corresponding path program 2 times [2022-11-20 11:28:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:09,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107847382] [2022-11-20 11:28:09,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:09,054 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 [2022-11-20 11:28:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:09,056 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:09,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:09,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:09,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:28:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:09,368 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 [2022-11-20 11:28:09,392 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 [2022-11-20 11:28:09,418 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 [2022-11-20 11:28:09,571 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 11:28:09,571 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 [2022-11-20 11:28:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 23 not checked. [2022-11-20 11:28:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:10,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107847382] [2022-11-20 11:28:10,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107847382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [725420100] [2022-11-20 11:28:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:10,350 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:10,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-20 11:28:10,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:28:10,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263021313] [2022-11-20 11:28:10,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:10,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:28:10,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 1 [2022-11-20 11:28:10,676 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:28:10,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:28:10,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:28:10,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:10,950 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 [2022-11-20 11:28:10,976 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 [2022-11-20 11:28:13,075 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 [2022-11-20 11:28:15,166 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 [2022-11-20 11:28:15,241 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-20 11:28:15,241 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 [2022-11-20 11:28:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 26 not checked. [2022-11-20 11:28:15,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:15,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263021313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:15,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:15,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 12 [2022-11-20 11:28:15,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935812469] [2022-11-20 11:28:15,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:15,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:28:15,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:15,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:28:15,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=8, NotChecked=102, Total=182 [2022-11-20 11:28:15,511 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) [2022-11-20 11:28:21,647 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 [2022-11-20 11:28:25,689 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 [2022-11-20 11:28:29,972 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 [2022-11-20 11:28:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:29,980 INFO L93 Difference]: Finished difference Result 139 states and 180 transitions. [2022-11-20 11:28:29,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:28:29,981 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 [2022-11-20 11:28:29,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:29,983 INFO L225 Difference]: With dead ends: 139 [2022-11-20 11:28:29,983 INFO L226 Difference]: Without dead ends: 139 [2022-11-20 11:28:29,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=49, Invalid=63, Unknown=14, NotChecked=216, Total=342 [2022-11-20 11:28:29,984 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:29,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 67 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 651 Unchecked, 0.2s Time] [2022-11-20 11:28:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-20 11:28:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-11-20 11:28:29,990 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) [2022-11-20 11:28:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2022-11-20 11:28:29,992 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 49 [2022-11-20 11:28:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:29,993 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2022-11-20 11:28:29,993 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) [2022-11-20 11:28:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2022-11-20 11:28:29,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:28:29,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:29,995 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 11:28:30,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-20 11:28:30,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:30,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:30,404 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:30,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1475599677, now seen corresponding path program 2 times [2022-11-20 11:28:30,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:30,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578707294] [2022-11-20 11:28:30,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:30,405 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 [2022-11-20 11:28:30,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:30,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:30,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:30,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:28:30,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:30,691 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 [2022-11-20 11:28:30,698 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 [2022-11-20 11:28:30,766 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1072 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1072))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:30,809 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 [2022-11-20 11:28:30,884 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1072 (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1072) v_nondet_tree_~n~0.base_77 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:30,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:31,000 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:28:31,001 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-11-20 11:28:31,017 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:28:31,018 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 [2022-11-20 11:28:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 30 not checked. [2022-11-20 11:28:31,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:31,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:31,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578707294] [2022-11-20 11:28:31,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578707294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290087044] [2022-11-20 11:28:31,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:31,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:31,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:31,523 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:31,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-20 11:28:31,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:31,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:28:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:31,894 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 [2022-11-20 11:28:31,900 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 [2022-11-20 11:28:31,943 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1155 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1155) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:32,031 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_1155 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_88 v_ArrVal_1155) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_88)))) is different from true [2022-11-20 11:28:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:32,158 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:28:32,158 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 [2022-11-20 11:28:32,182 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:28:32,182 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 [2022-11-20 11:28:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 30 not checked. [2022-11-20 11:28:32,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:34,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [290087044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:34,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:34,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-20 11:28:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396621368] [2022-11-20 11:28:34,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:28:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:28:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=43, Unknown=5, NotChecked=80, Total=156 [2022-11-20 11:28:34,637 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 11:28:35,058 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_1155 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_88 v_ArrVal_1155) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_88)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1072 (_ BitVec 32)) (v_nondet_tree_~n~0.base_77 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1072) v_nondet_tree_~n~0.base_77 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:28:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:35,063 INFO L93 Difference]: Finished difference Result 151 states and 199 transitions. [2022-11-20 11:28:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:28:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (8), 3 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 39 [2022-11-20 11:28:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:35,065 INFO L225 Difference]: With dead ends: 151 [2022-11-20 11:28:35,065 INFO L226 Difference]: Without dead ends: 151 [2022-11-20 11:28:35,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=43, Invalid=63, Unknown=8, NotChecked=126, Total=240 [2022-11-20 11:28:35,066 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 88 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:35,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 60 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 170 Invalid, 0 Unknown, 440 Unchecked, 0.3s Time] [2022-11-20 11:28:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-20 11:28:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-20 11:28:35,072 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) [2022-11-20 11:28:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 199 transitions. [2022-11-20 11:28:35,074 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 199 transitions. Word has length 39 [2022-11-20 11:28:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:35,075 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 199 transitions. [2022-11-20 11:28:35,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 11:28:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 199 transitions. [2022-11-20 11:28:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 11:28:35,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:35,076 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] [2022-11-20 11:28:35,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:35,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:35,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:35,496 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1738803102, now seen corresponding path program 2 times [2022-11-20 11:28:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:35,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689884150] [2022-11-20 11:28:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:35,497 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 [2022-11-20 11:28:35,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:35,498 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:35,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:35,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:35,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:28:35,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:28:35,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:36,766 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 [2022-11-20 11:28:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:28:36,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:36,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689884150] [2022-11-20 11:28:36,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689884150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:36,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:36,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 11:28:36,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654928341] [2022-11-20 11:28:36,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:36,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:28:36,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:28:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:28:36,914 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) [2022-11-20 11:28:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:38,623 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2022-11-20 11:28:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:28:38,625 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 [2022-11-20 11:28:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:38,626 INFO L225 Difference]: With dead ends: 155 [2022-11-20 11:28:38,626 INFO L226 Difference]: Without dead ends: 155 [2022-11-20 11:28:38,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:28:38,627 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 85 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:38,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 566 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 452 Invalid, 0 Unknown, 74 Unchecked, 1.5s Time] [2022-11-20 11:28:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-20 11:28:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-11-20 11:28:38,635 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) [2022-11-20 11:28:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 197 transitions. [2022-11-20 11:28:38,637 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 197 transitions. Word has length 39 [2022-11-20 11:28:38,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:38,637 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 197 transitions. [2022-11-20 11:28:38,637 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) [2022-11-20 11:28:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 197 transitions. [2022-11-20 11:28:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 11:28:38,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:38,639 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 11:28:38,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Ended with exit code 0 [2022-11-20 11:28:38,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:38,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1450953460, now seen corresponding path program 3 times [2022-11-20 11:28:38,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:38,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981233937] [2022-11-20 11:28:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:38,853 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 [2022-11-20 11:28:38,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:38,854 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:38,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:39,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:28:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:39,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:28:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:39,271 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 [2022-11-20 11:28:39,299 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1318 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1318))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:39,329 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1318 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1318)))) is different from true [2022-11-20 11:28:39,351 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1319 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1319))) is different from true [2022-11-20 11:28:41,584 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 11:28:41,585 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 [2022-11-20 11:28:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 14 not checked. [2022-11-20 11:28:41,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:42,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981233937] [2022-11-20 11:28:42,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981233937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [961981228] [2022-11-20 11:28:42,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:42,104 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:42,105 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:42,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-20 11:28:42,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:28:42,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:28:42,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:42,654 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1430 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1430))) is different from true [2022-11-20 11:28:42,689 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1431 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1431) |c_#valid|)) is different from true [2022-11-20 11:28:42,746 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 [2022-11-20 11:28:42,762 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1430 (_ BitVec 1)) (v_nondet_tree_~n~0.base_123 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1430) v_nondet_tree_~n~0.base_123 (_ bv1 1)))) is different from true [2022-11-20 11:28:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:28:44,885 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-20 11:28:44,885 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 [2022-11-20 11:28:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 22 not checked. [2022-11-20 11:28:44,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:45,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [961981228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:45,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:45,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-11-20 11:28:45,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235151563] [2022-11-20 11:28:45,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:45,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:28:45,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:28:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=61, Unknown=9, NotChecked=154, Total=272 [2022-11-20 11:28:45,234 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) [2022-11-20 11:28:49,326 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1430 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1430))) (exists ((v_ArrVal_1431 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1431) |c_#valid|)) (exists ((v_ArrVal_1319 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1319))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1318 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1318))))) is different from true [2022-11-20 11:28:49,331 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1430 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_1430))) (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_1319 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1319))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1318 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1318))))) is different from true [2022-11-20 11:28:49,335 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_1319 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1319))))) (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 [2022-11-20 11:28:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:51,663 INFO L93 Difference]: Finished difference Result 163 states and 231 transitions. [2022-11-20 11:28:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:28:51,664 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 [2022-11-20 11:28:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:51,666 INFO L225 Difference]: With dead ends: 163 [2022-11-20 11:28:51,666 INFO L226 Difference]: Without dead ends: 163 [2022-11-20 11:28:51,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=71, Invalid=88, Unknown=13, NotChecked=290, Total=462 [2022-11-20 11:28:51,667 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 898 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:51,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 0 Unknown, 898 Unchecked, 0.3s Time] [2022-11-20 11:28:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-20 11:28:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 155. [2022-11-20 11:28:51,702 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) [2022-11-20 11:28:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 210 transitions. [2022-11-20 11:28:51,706 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 210 transitions. Word has length 49 [2022-11-20 11:28:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:51,707 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 210 transitions. [2022-11-20 11:28:51,707 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) [2022-11-20 11:28:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 210 transitions. [2022-11-20 11:28:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 11:28:51,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:51,709 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2022-11-20 11:28:51,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-20 11:28:51,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:52,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:52,115 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:52,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1450953461, now seen corresponding path program 3 times [2022-11-20 11:28:52,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747579350] [2022-11-20 11:28:52,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:52,116 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 [2022-11-20 11:28:52,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:52,117 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:52,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:52,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:28:52,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:28:52,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:52,559 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 [2022-11-20 11:28:52,671 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 [2022-11-20 11:28:52,771 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1543 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1543) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:52,852 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 11:28:52,852 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 15 treesize of output 27 [2022-11-20 11:28:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 3 refuted. 1 times theorem prover too weak. 19 trivial. 26 not checked. [2022-11-20 11:28:52,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:53,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747579350] [2022-11-20 11:28:53,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747579350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:53,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1272681168] [2022-11-20 11:28:53,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:28:53,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:53,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:53,507 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:53,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-20 11:28:54,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:28:54,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:28:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:54,281 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 [2022-11-20 11:28:54,287 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 [2022-11-20 11:28:54,440 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1649 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1649)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:54,649 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1649 (_ BitVec 32)) (v_ArrVal_1651 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret9.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1649) |c_nondet_tree_#t~ret9.base| v_ArrVal_1651) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:54,673 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1649 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_1651 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1649) |nondet_tree_#t~ret9.base| v_ArrVal_1651)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:54,738 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 [2022-11-20 11:28:54,766 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 11:28:54,766 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 [2022-11-20 11:28:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 41 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 14 not checked. [2022-11-20 11:28:54,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:55,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1272681168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:55,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:55,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2022-11-20 11:28:55,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942123619] [2022-11-20 11:28:55,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:55,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:55,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:28:55,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:55,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=170, Unknown=11, NotChecked=150, Total=380 [2022-11-20 11:28:55,273 INFO L87 Difference]: Start difference. First operand 155 states and 210 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 8 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-20 11:28:56,087 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1649 (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_1651 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret9.base|)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1649) |nondet_tree_#t~ret9.base| v_ArrVal_1651)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_1543 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_137 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1543) v_nondet_tree_~n~0.base_137 (_ bv12 32)) |c_#length|) (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:28:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:56,120 INFO L93 Difference]: Finished difference Result 155 states and 209 transitions. [2022-11-20 11:28:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:28:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 8 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 49 [2022-11-20 11:28:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:56,122 INFO L225 Difference]: With dead ends: 155 [2022-11-20 11:28:56,122 INFO L226 Difference]: Without dead ends: 155 [2022-11-20 11:28:56,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=311, Unknown=12, NotChecked=246, Total=650 [2022-11-20 11:28:56,123 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:56,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 95 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 799 Unchecked, 0.2s Time] [2022-11-20 11:28:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-20 11:28:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-11-20 11:28:56,132 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) [2022-11-20 11:28:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2022-11-20 11:28:56,134 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 49 [2022-11-20 11:28:56,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:56,134 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2022-11-20 11:28:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 14 states have internal predecessors, (53), 8 states have call successors, (13), 3 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-20 11:28:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2022-11-20 11:28:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:28:56,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:56,136 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:28:56,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:56,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:56,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:56,542 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:28:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash -766548246, now seen corresponding path program 2 times [2022-11-20 11:28:56,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:28:56,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209340991] [2022-11-20 11:28:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:56,543 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 [2022-11-20 11:28:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:28:56,544 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:28:56,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:28:56,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:56,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:28:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:56,994 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 [2022-11-20 11:28:57,002 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 [2022-11-20 11:28:57,057 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_1787 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1787) |c_#length|)))) is different from true [2022-11-20 11:28:57,086 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 [2022-11-20 11:28:57,148 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1787 (_ BitVec 32)) (v_nondet_tree_~n~0.base_156 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1787) v_nondet_tree_~n~0.base_156 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:57,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:57,259 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:28:57,260 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 [2022-11-20 11:28:57,274 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:28:57,275 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 [2022-11-20 11:28:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-20 11:28:57,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:58,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:28:58,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209340991] [2022-11-20 11:28:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209340991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1334712218] [2022-11-20 11:28:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:28:58,007 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:28:58,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:28:58,008 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:28:58,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-20 11:28:58,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:28:58,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:28:58,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:28:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:58,588 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 [2022-11-20 11:28:58,597 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 [2022-11-20 11:28:58,639 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1916 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1916))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:58,741 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_1916 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1916) v_nondet_tree_~n~0.base_167 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:28:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:28:58,858 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:28:58,859 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 [2022-11-20 11:28:58,874 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:28:58,874 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 [2022-11-20 11:28:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-20 11:28:58,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:05,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1334712218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:05,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:05,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-20 11:29:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780768759] [2022-11-20 11:29:05,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:29:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:29:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=82, Unknown=7, NotChecked=110, Total=240 [2022-11-20 11:29:05,439 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) [2022-11-20 11:29:05,952 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_167 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1916 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1916) v_nondet_tree_~n~0.base_167 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_1787 (_ BitVec 32)) (v_nondet_tree_~n~0.base_156 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1787) v_nondet_tree_~n~0.base_156 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:29:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:05,986 INFO L93 Difference]: Finished difference Result 171 states and 239 transitions. [2022-11-20 11:29:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:29:05,987 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 59 [2022-11-20 11:29:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:05,988 INFO L225 Difference]: With dead ends: 171 [2022-11-20 11:29:05,988 INFO L226 Difference]: Without dead ends: 171 [2022-11-20 11:29:05,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=60, Invalid=111, Unknown=9, NotChecked=162, Total=342 [2022-11-20 11:29:05,989 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:05,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 64 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 176 Invalid, 0 Unknown, 439 Unchecked, 0.4s Time] [2022-11-20 11:29:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-20 11:29:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-20 11:29:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 114 states have (on average 1.280701754385965) internal successors, (146), 130 states have internal predecessors, (146), 23 states have call successors, (23), 11 states have call predecessors, (23), 18 states have return successors, (70), 29 states have call predecessors, (70), 23 states have call successors, (70) [2022-11-20 11:29:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 239 transitions. [2022-11-20 11:29:06,003 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 239 transitions. Word has length 59 [2022-11-20 11:29:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:06,004 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 239 transitions. [2022-11-20 11:29:06,005 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) [2022-11-20 11:29:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 239 transitions. [2022-11-20 11:29:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:29:06,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:06,007 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] [2022-11-20 11:29:06,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:06,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:06,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:06,413 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:29:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:06,414 INFO L85 PathProgramCache]: Analyzing trace with hash -612022781, now seen corresponding path program 1 times [2022-11-20 11:29:06,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:06,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773787218] [2022-11-20 11:29:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:06,414 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 [2022-11-20 11:29:06,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:06,415 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:29:06,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:29:06,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:06,643 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 [2022-11-20 11:29:06,652 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 [2022-11-20 11:29:07,102 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 [2022-11-20 11:29:07,105 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 [2022-11-20 11:29:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:29:07,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:29:07,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:07,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773787218] [2022-11-20 11:29:07,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773787218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:07,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:07,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2022-11-20 11:29:07,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655621915] [2022-11-20 11:29:07,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:07,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:29:07,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:07,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:29:07,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:29:07,644 INFO L87 Difference]: Start difference. First operand 171 states and 239 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) [2022-11-20 11:29:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:08,682 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2022-11-20 11:29:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:29:08,683 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 [2022-11-20 11:29:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:08,685 INFO L225 Difference]: With dead ends: 212 [2022-11-20 11:29:08,685 INFO L226 Difference]: Without dead ends: 212 [2022-11-20 11:29:08,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:29:08,686 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 36 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:08,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 886 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 257 Invalid, 0 Unknown, 37 Unchecked, 0.7s Time] [2022-11-20 11:29:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-20 11:29:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 202. [2022-11-20 11:29:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.2846715328467153) internal successors, (176), 155 states have internal predecessors, (176), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 32 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:29:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 291 transitions. [2022-11-20 11:29:08,700 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 291 transitions. Word has length 38 [2022-11-20 11:29:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:08,701 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 291 transitions. [2022-11-20 11:29:08,701 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) [2022-11-20 11:29:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 291 transitions. [2022-11-20 11:29:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:29:08,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:08,703 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:29:08,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Ended with exit code 0 [2022-11-20 11:29:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:08,917 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:29:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 917383077, now seen corresponding path program 2 times [2022-11-20 11:29:08,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:08,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727918323] [2022-11-20 11:29:08,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:29:08,919 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 [2022-11-20 11:29:08,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:08,920 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:29:08,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:09,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:29:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:09,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:29:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:09,301 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 [2022-11-20 11:29:09,361 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2064 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2064) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:09,425 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2064 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2064) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:09,452 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 [2022-11-20 11:29:09,602 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 11:29:09,602 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 [2022-11-20 11:29:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 31 not checked. [2022-11-20 11:29:09,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:11,845 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:11,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727918323] [2022-11-20 11:29:11,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727918323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:11,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [666411429] [2022-11-20 11:29:11,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:29:11,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:11,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:29:11,847 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:29:11,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-20 11:29:12,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:29:12,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466785642] [2022-11-20 11:29:12,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:29:12,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:29:12,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:29:12,328 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:29:12,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 11:29:12,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 1 [2022-11-20 11:29:12,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:29:12,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:29:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:12,637 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2278 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2278) |c_#valid|)) is different from true [2022-11-20 11:29:12,674 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2279 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2279))) is different from true [2022-11-20 11:29:14,772 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2278 (_ BitVec 1)) (v_nondet_tree_~n~0.base_192 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_2278) v_nondet_tree_~n~0.base_192 (_ bv1 1)))) is different from true [2022-11-20 11:29:16,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:29:16,915 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-20 11:29:16,915 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 [2022-11-20 11:29:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 20 not checked. [2022-11-20 11:29:16,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:17,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466785642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:17,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:17,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2022-11-20 11:29:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481064575] [2022-11-20 11:29:17,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:17,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:29:17,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:29:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=76, Unknown=9, NotChecked=138, Total=272 [2022-11-20 11:29:17,374 INFO L87 Difference]: Start difference. First operand 202 states and 291 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) [2022-11-20 11:29:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:33,268 INFO L93 Difference]: Finished difference Result 204 states and 293 transitions. [2022-11-20 11:29:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:29:33,269 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 [2022-11-20 11:29:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:33,271 INFO L225 Difference]: With dead ends: 204 [2022-11-20 11:29:33,271 INFO L226 Difference]: Without dead ends: 204 [2022-11-20 11:29:33,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=78, Invalid=114, Unknown=14, NotChecked=174, Total=380 [2022-11-20 11:29:33,272 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:33,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 62 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 604 Unchecked, 0.3s Time] [2022-11-20 11:29:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-20 11:29:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-11-20 11:29:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 138 states have (on average 1.289855072463768) internal successors, (178), 155 states have internal predecessors, (178), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 33 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:29:33,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2022-11-20 11:29:33,284 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 55 [2022-11-20 11:29:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:33,285 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2022-11-20 11:29:33,285 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) [2022-11-20 11:29:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2022-11-20 11:29:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:29:33,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:33,286 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:29:33,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:33,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:33,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:33,695 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:29:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 917383078, now seen corresponding path program 3 times [2022-11-20 11:29:33,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:33,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416431358] [2022-11-20 11:29:33,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:29:33,696 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 [2022-11-20 11:29:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:33,697 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:29:33,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:34,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:29:34,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:34,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:29:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:34,209 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 [2022-11-20 11:29:34,344 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2397 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2397))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:34,383 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2397 (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2397)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:34,415 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 [2022-11-20 11:29:34,485 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_206 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2397) 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 [2022-11-20 11:29:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:34,579 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:29:34,580 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 [2022-11-20 11:29:34,604 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:34,604 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 [2022-11-20 11:29:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 40 not checked. [2022-11-20 11:29:34,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:35,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416431358] [2022-11-20 11:29:35,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416431358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [593404221] [2022-11-20 11:29:35,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:29:35,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:35,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:29:35,004 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:29:35,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-20 11:29:35,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:29:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:29:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:35,709 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 [2022-11-20 11:29:35,915 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2509 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2509)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:36,162 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2510 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2509 (_ 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_2509) |c_nondet_tree_#t~ret9.base| v_ArrVal_2510)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:36,186 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2510 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_2509 (_ 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_2509) |nondet_tree_#t~ret9.base| v_ArrVal_2510) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:36,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:36,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:36,244 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 [2022-11-20 11:29:36,275 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 11:29:36,275 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 [2022-11-20 11:29:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 19 not checked. [2022-11-20 11:29:36,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:37,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [593404221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:37,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:37,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2022-11-20 11:29:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436560065] [2022-11-20 11:29:37,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:29:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:29:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=111, Unknown=7, NotChecked=182, Total=342 [2022-11-20 11:29:37,134 INFO L87 Difference]: Start difference. First operand 203 states and 293 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) [2022-11-20 11:29:37,839 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2510 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2509 (_ 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_2509) |c_nondet_tree_#t~ret9.base| v_ArrVal_2510)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_206 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2397) 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 [2022-11-20 11:29:37,847 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2510 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_2509 (_ 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_2509) |nondet_tree_#t~ret9.base| v_ArrVal_2510) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_206 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2397) 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 [2022-11-20 11:29:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:37,929 INFO L93 Difference]: Finished difference Result 204 states and 294 transitions. [2022-11-20 11:29:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:29:37,929 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 [2022-11-20 11:29:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:37,931 INFO L225 Difference]: With dead ends: 204 [2022-11-20 11:29:37,931 INFO L226 Difference]: Without dead ends: 204 [2022-11-20 11:29:37,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=70, Invalid=197, Unknown=9, NotChecked=324, Total=600 [2022-11-20 11:29:37,933 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:37,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 93 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 790 Unchecked, 0.3s Time] [2022-11-20 11:29:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-20 11:29:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-11-20 11:29:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 155 states have internal predecessors, (179), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 34 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:29:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-11-20 11:29:37,946 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 55 [2022-11-20 11:29:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:37,946 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-11-20 11:29:37,946 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) [2022-11-20 11:29:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-11-20 11:29:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:29:37,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:37,948 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 11:29:37,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:38,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:38,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:29:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash 953188140, now seen corresponding path program 4 times [2022-11-20 11:29:38,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:38,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262035574] [2022-11-20 11:29:38,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:29:38,367 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 [2022-11-20 11:29:38,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:38,368 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:29:38,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:38,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:29:38,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:29:38,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:38,897 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 [2022-11-20 11:29:38,904 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 [2022-11-20 11:29:38,982 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2652 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2652) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:39,041 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2652 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2652) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:39,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:39,128 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 [2022-11-20 11:29:39,145 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:39,146 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 [2022-11-20 11:29:39,223 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_2653 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2653))))) is different from true [2022-11-20 11:29:39,270 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2653 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2653)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:39,306 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 [2022-11-20 11:29:39,386 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2653 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_226 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_226 v_ArrVal_2653) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_226)))) is different from true [2022-11-20 11:29:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:39,484 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:29:39,485 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 [2022-11-20 11:29:39,520 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:39,520 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 [2022-11-20 11:29:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 81 not checked. [2022-11-20 11:29:39,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:39,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262035574] [2022-11-20 11:29:39,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262035574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104635357] [2022-11-20 11:29:39,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:29:39,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:39,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:29:39,970 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:29:39,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-20 11:29:40,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:29:40,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:40,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 11:29:40,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:40,769 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 [2022-11-20 11:29:40,776 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 [2022-11-20 11:29:40,825 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2788 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2788) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:40,886 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2788 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2788) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:40,987 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 [2022-11-20 11:29:41,008 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:41,009 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 [2022-11-20 11:29:41,056 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2789 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2789) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:41,101 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2789 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2789) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:41,219 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2789 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_238 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_238)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_238 v_ArrVal_2789) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 11:29:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:41,307 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:29:41,307 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 [2022-11-20 11:29:41,332 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:41,333 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 [2022-11-20 11:29:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 21 trivial. 81 not checked. [2022-11-20 11:29:41,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:45,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1104635357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:45,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:45,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-20 11:29:45,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282087081] [2022-11-20 11:29:45,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:45,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:29:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:29:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=59, Unknown=13, NotChecked=264, Total=380 [2022-11-20 11:29:45,860 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 17 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-20 11:29:46,010 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_2652 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2652) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2788 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2788) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2789 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2789) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2653 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2653)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:29:46,015 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_2652 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2652) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_2788 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2788) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:29:46,266 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2789 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_238 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_238)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_238 v_ArrVal_2789) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) (exists ((v_ArrVal_2653 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_226 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_226 v_ArrVal_2653) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_226))))) is different from true [2022-11-20 11:29:46,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:46,378 INFO L93 Difference]: Finished difference Result 205 states and 295 transitions. [2022-11-20 11:29:46,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:29:46,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) Word has length 63 [2022-11-20 11:29:46,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:46,380 INFO L225 Difference]: With dead ends: 205 [2022-11-20 11:29:46,380 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 11:29:46,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=57, Invalid=72, Unknown=17, NotChecked=406, Total=552 [2022-11-20 11:29:46,381 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 46 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 985 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:46,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 78 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 985 Unchecked, 0.4s Time] [2022-11-20 11:29:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 11:29:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-11-20 11:29:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 155 states have internal predecessors, (179), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 34 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:29:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-11-20 11:29:46,393 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 63 [2022-11-20 11:29:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:46,394 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-11-20 11:29:46,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-20 11:29:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-11-20 11:29:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:29:46,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:46,395 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:29:46,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:46,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:46,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:46,817 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:29:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:46,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1719860631, now seen corresponding path program 3 times [2022-11-20 11:29:46,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:46,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534450630] [2022-11-20 11:29:46,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:29:46,818 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 [2022-11-20 11:29:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:46,819 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:29:46,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:47,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:29:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:29:47,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:47,201 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2916 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2916) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:47,240 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2916 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2916) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:47,337 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:29:47,338 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 [2022-11-20 11:29:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 7 not checked. [2022-11-20 11:29:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:47,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534450630] [2022-11-20 11:29:47,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534450630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:47,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1192463939] [2022-11-20 11:29:47,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:29:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:29:47,505 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:29:47,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-20 11:29:48,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:29:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:29:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:48,028 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3041 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3041) |c_#valid|)) is different from true [2022-11-20 11:29:48,119 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 [2022-11-20 11:29:48,154 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:29:48,154 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 [2022-11-20 11:29:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 61 trivial. 5 not checked. [2022-11-20 11:29:48,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:48,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1192463939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:48,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:48,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2022-11-20 11:29:48,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939822568] [2022-11-20 11:29:48,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:48,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:29:48,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:29:48,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:29:48,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=4, NotChecked=44, Total=90 [2022-11-20 11:29:48,301 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 11:29:50,350 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2916 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2916) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (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_3041 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3041) |c_#valid|))))) is different from true [2022-11-20 11:29:50,355 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2916 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2916) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (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_3041 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3041) |c_#valid|))))) is different from true [2022-11-20 11:29:50,390 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2916 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2916) |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 [2022-11-20 11:29:50,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:50,654 INFO L93 Difference]: Finished difference Result 206 states and 296 transitions. [2022-11-20 11:29:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:29:50,655 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), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 59 [2022-11-20 11:29:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:50,657 INFO L225 Difference]: With dead ends: 206 [2022-11-20 11:29:50,657 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 11:29:50,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=36, Invalid=41, Unknown=7, NotChecked=126, Total=210 [2022-11-20 11:29:50,658 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:50,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 50 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 419 Unchecked, 0.3s Time] [2022-11-20 11:29:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 11:29:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-11-20 11:29:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 155 states have internal predecessors, (179), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 34 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:29:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-11-20 11:29:50,671 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 59 [2022-11-20 11:29:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:50,671 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-11-20 11:29:50,672 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), 5 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 11:29:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-11-20 11:29:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 11:29:50,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:50,674 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:29:50,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:50,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:51,089 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:29:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1426263836, now seen corresponding path program 5 times [2022-11-20 11:29:51,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:29:51,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359853505] [2022-11-20 11:29:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:29:51,090 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 [2022-11-20 11:29:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:29:51,092 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:29:51,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:29:52,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 11:29:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:29:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:29:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:52,315 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 [2022-11-20 11:29:52,326 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 [2022-11-20 11:29:52,400 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_3189 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3189) |c_#length|)))) is different from true [2022-11-20 11:29:52,453 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3189 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3189) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:52,530 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 [2022-11-20 11:29:52,547 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:52,547 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 [2022-11-20 11:29:52,609 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3190 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3190) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:52,647 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3190 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3190) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:29:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:52,730 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 [2022-11-20 11:29:52,743 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:29:52,743 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 [2022-11-20 11:29:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 107 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 40 not checked. [2022-11-20 11:29:52,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:55,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:29:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359853505] [2022-11-20 11:29:55,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359853505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [787943004] [2022-11-20 11:29:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:29:55,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:29:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:29:55,274 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:29:55,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-20 11:29:56,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:29:56,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282576370] [2022-11-20 11:29:56,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:29:56,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:29:56,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:29:56,193 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:29:56,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 1 [2022-11-20 11:29:56,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 11:30:26,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 11:30:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:30:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:26,750 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 [2022-11-20 11:30:27,055 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:30:27,055 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 [2022-11-20 11:30:27,063 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 [2022-11-20 11:30:27,206 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3485 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3485) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:30:27,243 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3485 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3485) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:30:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:30:27,320 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:30:27,349 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 11:30:27,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 11:30:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 40 trivial. 25 not checked. [2022-11-20 11:30:27,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:29,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282576370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:30:29,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:29,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-20 11:30:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283757870] [2022-11-20 11:30:29,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:29,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:30:29,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:30:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=87, Unknown=7, NotChecked=138, Total=272 [2022-11-20 11:30:29,579 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 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) [2022-11-20 11:30:29,867 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3484 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3484) |c_#length|)) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (exists ((v_ArrVal_3483 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3483))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3485 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3485) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3190 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3190) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_3189 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3189) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:30:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:30,157 INFO L93 Difference]: Finished difference Result 205 states and 295 transitions. [2022-11-20 11:30:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:30:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 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 69 [2022-11-20 11:30:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:30,159 INFO L225 Difference]: With dead ends: 205 [2022-11-20 11:30:30,160 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 11:30:30,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=50, Invalid=102, Unknown=8, NotChecked=182, Total=342 [2022-11-20 11:30:30,161 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:30,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 80 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 620 Unchecked, 0.3s Time] [2022-11-20 11:30:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 11:30:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-11-20 11:30:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 155 states have internal predecessors, (179), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 34 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:30:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-11-20 11:30:30,172 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 69 [2022-11-20 11:30:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:30,173 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-11-20 11:30:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 15 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) [2022-11-20 11:30:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-11-20 11:30:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 11:30:30,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:30,175 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 11:30:30,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:30:30,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:30,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:30:30,594 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:30:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash -926697763, now seen corresponding path program 4 times [2022-11-20 11:30:30,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:30,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269998422] [2022-11-20 11:30:30,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:30:30,595 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 [2022-11-20 11:30:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:30,596 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:30:30,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:30:31,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:30:31,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:31,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:30:31,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:31,206 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 [2022-11-20 11:30:31,253 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3640 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3640))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:30:31,291 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 [2022-11-20 11:30:31,459 INFO L321 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2022-11-20 11:30:31,459 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 [2022-11-20 11:30:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 122 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 28 not checked. [2022-11-20 11:30:31,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:32,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269998422] [2022-11-20 11:30:32,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269998422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:30:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017614675] [2022-11-20 11:30:32,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:30:32,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:30:32,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:30:32,356 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:30:32,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-20 11:30:33,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:30:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:33,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:30:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:33,239 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 [2022-11-20 11:30:33,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3797 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3797) |c_#valid|)) is different from true [2022-11-20 11:30:33,332 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3797 (_ BitVec 1)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_3797) v_nondet_tree_~n~0.base_278 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 11:30:35,436 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3797 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3797) v_nondet_tree_~n~0.base_278 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= |c_#valid| .cse0)))) is different from true [2022-11-20 11:30:35,517 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-20 11:30:35,518 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 [2022-11-20 11:30:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 38 not checked. [2022-11-20 11:30:35,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:35,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017614675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:30:35,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:30:35,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2022-11-20 11:30:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461966646] [2022-11-20 11:30:35,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:30:35,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:30:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:30:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:30:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=6, NotChecked=70, Total=132 [2022-11-20 11:30:35,829 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 11:30:48,009 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3797 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3797) v_nondet_tree_~n~0.base_278 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= |c_#valid| .cse0)))) (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 [2022-11-20 11:30:52,358 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3797 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_278 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_3797) v_nondet_tree_~n~0.base_278 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= |c_#valid| .cse0)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_3640 (_ BitVec 1)) (v_nondet_tree_~n~0.base_267 (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_267 v_ArrVal_3640) nondet_tree_~n~0.base (_ bv1 1))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_267))))) is different from true [2022-11-20 11:30:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:52,396 INFO L93 Difference]: Finished difference Result 206 states and 296 transitions. [2022-11-20 11:30:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:30:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2022-11-20 11:30:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:52,399 INFO L225 Difference]: With dead ends: 206 [2022-11-20 11:30:52,399 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 11:30:52,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 143 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=46, Invalid=60, Unknown=12, NotChecked=154, Total=272 [2022-11-20 11:30:52,400 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 49 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:52,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 73 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 635 Unchecked, 0.3s Time] [2022-11-20 11:30:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 11:30:52,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2022-11-20 11:30:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 155 states have internal predecessors, (179), 27 states have call successors, (27), 14 states have call predecessors, (27), 22 states have return successors, (88), 34 states have call predecessors, (88), 27 states have call successors, (88) [2022-11-20 11:30:52,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2022-11-20 11:30:52,411 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 73 [2022-11-20 11:30:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:52,411 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2022-11-20 11:30:52,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 7 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-20 11:30:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2022-11-20 11:30:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 11:30:52,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:52,413 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 11:30:52,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-20 11:30:52,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:30:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:30:52,822 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:30:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1521179632, now seen corresponding path program 6 times [2022-11-20 11:30:52,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:30:52,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608710691] [2022-11-20 11:30:52,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:30:52,823 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 [2022-11-20 11:30:52,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:30:52,824 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:30:52,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:30:53,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 11:30:53,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:53,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:30:53,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:53,770 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 [2022-11-20 11:30:53,896 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_3977 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_3977) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:30:53,924 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 [2022-11-20 11:30:53,995 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_289 (_ BitVec 32)) (v_ArrVal_3977 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_289)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_289 v_ArrVal_3977) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-20 11:30:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:30:54,137 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:30:54,137 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 [2022-11-20 11:30:54,156 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:30:54,156 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 [2022-11-20 11:30:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 165 proven. 4 refuted. 0 times theorem prover too weak. 89 trivial. 40 not checked. [2022-11-20 11:30:54,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:30:56,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:30:56,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608710691] [2022-11-20 11:30:56,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608710691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:30:56,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086631646] [2022-11-20 11:30:56,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:30:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:30:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:30:56,559 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:30:56,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-20 11:30:57,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 11:30:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:30:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:30:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:57,826 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 [2022-11-20 11:30:58,169 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4159 (_ BitVec 32)) (v_ArrVal_4157 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret8.base|) (_ bv0 1)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4157) |c_nondet_tree_#t~ret8.base| v_ArrVal_4159) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:30:58,192 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4159 (_ BitVec 32)) (v_ArrVal_4157 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret8.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4157) |nondet_tree_#t~ret8.base| v_ArrVal_4159) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:30:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:30:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:30:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:30:58,320 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 [2022-11-20 11:30:58,352 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 11:30:58,353 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 [2022-11-20 11:30:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 164 proven. 36 refuted. 0 times theorem prover too weak. 79 trivial. 19 not checked. [2022-11-20 11:30:58,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:02,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086631646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:31:02,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:02,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 13 [2022-11-20 11:31:02,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389840619] [2022-11-20 11:31:02,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:02,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:31:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:31:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=108, Unknown=6, NotChecked=120, Total=272 [2022-11-20 11:31:02,667 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-20 11:31:03,354 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4159 (_ BitVec 32)) (v_ArrVal_4157 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_nondet_tree_#t~ret8.base|) (_ bv0 1)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4157) |c_nondet_tree_#t~ret8.base| v_ArrVal_4159) |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_289 (_ BitVec 32)) (v_ArrVal_3977 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_289)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_289 v_ArrVal_3977) nondet_tree_~n~0.base (_ bv12 32)))))) is different from true [2022-11-20 11:31:03,362 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4159 (_ BitVec 32)) (v_ArrVal_4157 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |nondet_tree_#t~ret8.base|)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4157) |nondet_tree_#t~ret8.base| v_ArrVal_4159) |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_289 (_ BitVec 32)) (v_ArrVal_3977 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_289)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_289 v_ArrVal_3977) nondet_tree_~n~0.base (_ bv12 32)))))) is different from true [2022-11-20 11:31:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:03,480 INFO L93 Difference]: Finished difference Result 225 states and 331 transitions. [2022-11-20 11:31:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:31:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 83 [2022-11-20 11:31:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:03,482 INFO L225 Difference]: With dead ends: 225 [2022-11-20 11:31:03,483 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 11:31:03,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=103, Invalid=294, Unknown=11, NotChecked=294, Total=702 [2022-11-20 11:31:03,484 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 46 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:03,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 101 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 679 Unchecked, 0.3s Time] [2022-11-20 11:31:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 11:31:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-11-20 11:31:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 153 states have (on average 1.2679738562091503) internal successors, (194), 170 states have internal predecessors, (194), 30 states have call successors, (30), 15 states have call predecessors, (30), 25 states have return successors, (106), 38 states have call predecessors, (106), 30 states have call successors, (106) [2022-11-20 11:31:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 330 transitions. [2022-11-20 11:31:03,496 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 330 transitions. Word has length 83 [2022-11-20 11:31:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:03,496 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 330 transitions. [2022-11-20 11:31:03,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2022-11-20 11:31:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 330 transitions. [2022-11-20 11:31:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:31:03,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:03,498 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] [2022-11-20 11:31:03,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:03,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:03,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:31:03,916 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:31:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:03,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1293875203, now seen corresponding path program 2 times [2022-11-20 11:31:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055212012] [2022-11-20 11:31:03,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:31:03,917 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 [2022-11-20 11:31:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:03,918 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:31:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Waiting until timeout for monitored process [2022-11-20 11:31:04,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:31:04,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:31:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:04,294 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 [2022-11-20 11:31:04,382 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 [2022-11-20 11:31:04,475 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 [2022-11-20 11:31:04,707 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 [2022-11-20 11:31:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:31:04,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:31:05,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055212012] [2022-11-20 11:31:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055212012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:05,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:05,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2022-11-20 11:31:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228940281] [2022-11-20 11:31:05,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:05,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:31:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:31:05,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:31:05,648 INFO L87 Difference]: Start difference. First operand 224 states and 330 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) [2022-11-20 11:31:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:09,438 INFO L93 Difference]: Finished difference Result 255 states and 367 transitions. [2022-11-20 11:31:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:31:09,439 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 [2022-11-20 11:31:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:09,440 INFO L225 Difference]: With dead ends: 255 [2022-11-20 11:31:09,440 INFO L226 Difference]: Without dead ends: 253 [2022-11-20 11:31:09,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:31:09,441 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 191 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:09,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 234 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1551 Invalid, 0 Unknown, 81 Unchecked, 3.2s Time] [2022-11-20 11:31:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-20 11:31:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 241. [2022-11-20 11:31:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 166 states have (on average 1.283132530120482) internal successors, (213), 183 states have internal predecessors, (213), 32 states have call successors, (32), 17 states have call predecessors, (32), 27 states have return successors, (113), 40 states have call predecessors, (113), 32 states have call successors, (113) [2022-11-20 11:31:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 358 transitions. [2022-11-20 11:31:09,454 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 358 transitions. Word has length 45 [2022-11-20 11:31:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:09,454 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 358 transitions. [2022-11-20 11:31:09,454 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) [2022-11-20 11:31:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 358 transitions. [2022-11-20 11:31:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:31:09,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:09,456 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] [2022-11-20 11:31:09,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:09,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:09,671 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:31:09,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1293875202, now seen corresponding path program 1 times [2022-11-20 11:31:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:09,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767666488] [2022-11-20 11:31:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:31:09,672 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 [2022-11-20 11:31:09,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:09,673 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:31:09,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:31:10,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:31:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:10,072 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 [2022-11-20 11:31:10,211 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 [2022-11-20 11:31:10,223 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 [2022-11-20 11:31:10,349 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 23 treesize of output 22 [2022-11-20 11:31:10,360 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 25 treesize of output 24 [2022-11-20 11:31:10,723 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 [2022-11-20 11:31:10,729 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 [2022-11-20 11:31:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:31:10,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:31:17,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:17,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767666488] [2022-11-20 11:31:17,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767666488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:31:17,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:17,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-20 11:31:17,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366553734] [2022-11-20 11:31:17,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:31:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:31:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:31:17,081 INFO L87 Difference]: Start difference. First operand 241 states and 358 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) [2022-11-20 11:31:28,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:28,399 INFO L93 Difference]: Finished difference Result 279 states and 406 transitions. [2022-11-20 11:31:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:31:28,400 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 [2022-11-20 11:31:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:28,402 INFO L225 Difference]: With dead ends: 279 [2022-11-20 11:31:28,403 INFO L226 Difference]: Without dead ends: 279 [2022-11-20 11:31:28,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:31:28,403 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:28,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 453 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2228 Invalid, 0 Unknown, 146 Unchecked, 9.5s Time] [2022-11-20 11:31:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-20 11:31:28,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2022-11-20 11:31:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 189 states have (on average 1.2804232804232805) internal successors, (242), 206 states have internal predecessors, (242), 37 states have call successors, (37), 19 states have call predecessors, (37), 29 states have return successors, (120), 45 states have call predecessors, (120), 37 states have call successors, (120) [2022-11-20 11:31:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 399 transitions. [2022-11-20 11:31:28,416 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 399 transitions. Word has length 45 [2022-11-20 11:31:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:28,416 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 399 transitions. [2022-11-20 11:31:28,417 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) [2022-11-20 11:31:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 399 transitions. [2022-11-20 11:31:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:31:28,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:28,418 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 11:31:28,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:28,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:28,633 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:31:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash 439899498, now seen corresponding path program 7 times [2022-11-20 11:31:28,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:28,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133647695] [2022-11-20 11:31:28,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:31:28,635 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 [2022-11-20 11:31:28,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:28,637 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:31:28,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:31:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:31:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:29,246 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 [2022-11-20 11:31:29,252 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 [2022-11-20 11:31:29,317 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4451 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4451) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:31:29,364 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4451 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4451) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:31:29,391 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 [2022-11-20 11:31:29,465 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4451 (_ BitVec 32)) (v_nondet_tree_~n~0.base_332 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_332 v_ArrVal_4451) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_332)))) is different from true [2022-11-20 11:31:29,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:31:29,542 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:31:29,542 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 [2022-11-20 11:31:29,569 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:31:29,570 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 [2022-11-20 11:31:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-20 11:31:29,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:32,172 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:32,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133647695] [2022-11-20 11:31:32,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133647695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:31:32,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865493292] [2022-11-20 11:31:32,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:31:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:31:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:31:32,174 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:31:32,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-20 11:31:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:31:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:31:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:33,047 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 [2022-11-20 11:31:33,055 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 [2022-11-20 11:31:33,106 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_4580 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4580) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:31:33,148 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4580 (_ 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_4580) |c_#length|))) is different from true [2022-11-20 11:31:33,244 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_343 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4580 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4580) v_nondet_tree_~n~0.base_343 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:31:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:31:33,336 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 11:31:33,336 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 [2022-11-20 11:31:33,355 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:31:33,355 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 [2022-11-20 11:31:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 40 not checked. [2022-11-20 11:31:33,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:36,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865493292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:31:36,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:36,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-20 11:31:36,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726151626] [2022-11-20 11:31:36,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:36,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:31:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:31:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=84, Unknown=9, NotChecked=168, Total=306 [2022-11-20 11:31:36,605 INFO L87 Difference]: Start difference. First operand 271 states and 399 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 11:31:36,730 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_4451 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4451) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4580 (_ 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_4580) |c_#length|)))) is different from true [2022-11-20 11:31:37,024 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4451 (_ BitVec 32)) (v_nondet_tree_~n~0.base_332 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_332 v_ArrVal_4451) nondet_tree_~n~0.base (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_332)))) (exists ((v_nondet_tree_~n~0.base_343 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4580 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_4580) v_nondet_tree_~n~0.base_343 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:31:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:31:37,140 INFO L93 Difference]: Finished difference Result 290 states and 447 transitions. [2022-11-20 11:31:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:31:37,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 59 [2022-11-20 11:31:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:31:37,143 INFO L225 Difference]: With dead ends: 290 [2022-11-20 11:31:37,143 INFO L226 Difference]: Without dead ends: 290 [2022-11-20 11:31:37,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=66, Invalid=114, Unknown=12, NotChecked=270, Total=462 [2022-11-20 11:31:37,144 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, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 708 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:31:37,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 82 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 708 Unchecked, 0.4s Time] [2022-11-20 11:31:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-20 11:31:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-11-20 11:31:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 201 states have (on average 1.263681592039801) internal successors, (254), 221 states have internal predecessors, (254), 42 states have call successors, (42), 19 states have call predecessors, (42), 30 states have return successors, (150), 48 states have call predecessors, (150), 42 states have call successors, (150) [2022-11-20 11:31:37,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 446 transitions. [2022-11-20 11:31:37,160 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 446 transitions. Word has length 59 [2022-11-20 11:31:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:31:37,161 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 446 transitions. [2022-11-20 11:31:37,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 11:31:37,161 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 446 transitions. [2022-11-20 11:31:37,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 11:31:37,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:31:37,163 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 7, 7, 7, 7, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 11:31:37,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-20 11:31:37,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:37,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:31:37,572 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:31:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:31:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -721145396, now seen corresponding path program 4 times [2022-11-20 11:31:37,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:31:37,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226294359] [2022-11-20 11:31:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:31:37,573 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 [2022-11-20 11:31:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:31:37,575 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:31:37,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Waiting until timeout for monitored process [2022-11-20 11:31:38,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:31:38,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:31:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:38,298 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 [2022-11-20 11:31:38,327 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_4760 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4760) |c_#valid|)))) is different from true [2022-11-20 11:31:38,350 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4761 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4761) |c_#valid|)) is different from true [2022-11-20 11:31:38,373 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 [2022-11-20 11:31:38,431 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_354 (_ BitVec 32)) (v_ArrVal_4761 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4761) v_nondet_tree_~n~0.base_354 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 11:31:38,510 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_354 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4761 (_ BitVec 1))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4761) v_nondet_tree_~n~0.base_354 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-20 11:31:40,838 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-20 11:31:40,838 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 [2022-11-20 11:31:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 55 not checked. [2022-11-20 11:31:40,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:42,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:31:42,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226294359] [2022-11-20 11:31:42,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226294359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:31:42,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [122694275] [2022-11-20 11:31:42,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:31:42,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:31:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:31:42,490 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:31:42,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-20 11:31:43,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:31:43,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:31:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:31:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:31:43,652 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 [2022-11-20 11:31:43,674 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4947 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4947))) is different from true [2022-11-20 11:31:43,697 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_4948 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4948) |c_#valid|)))) is different from true [2022-11-20 11:31:47,913 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4947 (_ BitVec 1)) (v_ArrVal_4948 (_ BitVec 1)) (v_nondet_tree_~n~0.base_375 (_ BitVec 32)) (v_nondet_tree_~n~0.base_376 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_4947))) (and (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_376)) (= |c_#valid| (store (store .cse0 v_nondet_tree_~n~0.base_376 v_ArrVal_4948) v_nondet_tree_~n~0.base_375 (_ bv1 1)))))) is different from true [2022-11-20 11:31:55,111 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4947 (_ BitVec 1)) (v_ArrVal_4948 (_ BitVec 1)) (v_nondet_tree_~n~0.base_375 (_ BitVec 32)) (v_nondet_tree_~n~0.base_376 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4947))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_376 v_ArrVal_4948) v_nondet_tree_~n~0.base_375 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_376)) (= .cse0 |c_#valid|))))) is different from true [2022-11-20 11:31:55,417 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-20 11:31:55,417 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 76 treesize of output 109 [2022-11-20 11:31:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 55 not checked. [2022-11-20 11:31:55,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:31:56,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [122694275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:31:56,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:31:56,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-20 11:31:56,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833314758] [2022-11-20 11:31:56,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:31:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:31:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:31:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:31:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=15, NotChecked=198, Total=306 [2022-11-20 11:31:56,008 INFO L87 Difference]: Start difference. First operand 289 states and 446 transitions. Second operand has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 11:32:15,548 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_4948 (_ BitVec 1)) (v_nondet_tree_~n~0.base_375 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4948) v_nondet_tree_~n~0.base_375 (_ bv1 1)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_4947 (_ BitVec 1)) (v_ArrVal_4948 (_ BitVec 1)) (v_nondet_tree_~n~0.base_375 (_ BitVec 32)) (v_nondet_tree_~n~0.base_376 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4947))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_376 v_ArrVal_4948) v_nondet_tree_~n~0.base_375 (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_376)) (= .cse0 |c_#valid|))))) (exists ((v_nondet_tree_~n~0.base_354 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_4761 (_ BitVec 1))) (let ((.cse2 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_4761) v_nondet_tree_~n~0.base_354 (_ bv1 1)))) (and (= |c_#valid| .cse2) (= (bvadd (select .cse2 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)))))) is different from true [2022-11-20 11:32:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:34,863 INFO L93 Difference]: Finished difference Result 295 states and 471 transitions. [2022-11-20 11:32:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:32:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (14), 2 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 83 [2022-11-20 11:32:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:34,866 INFO L225 Difference]: With dead ends: 295 [2022-11-20 11:32:34,866 INFO L226 Difference]: Without dead ends: 295 [2022-11-20 11:32:34,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 53.2s TimeCoverageRelationStatistics Valid=81, Invalid=114, Unknown=27, NotChecked=330, Total=552 [2022-11-20 11:32:34,867 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1084 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:34,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 1084 Unchecked, 0.2s Time] [2022-11-20 11:32:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-20 11:32:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2022-11-20 11:32:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 205 states have (on average 1.2634146341463415) internal successors, (259), 224 states have internal predecessors, (259), 42 states have call successors, (42), 19 states have call predecessors, (42), 31 states have return successors, (170), 50 states have call predecessors, (170), 42 states have call successors, (170) [2022-11-20 11:32:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 471 transitions. [2022-11-20 11:32:34,883 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 471 transitions. Word has length 83 [2022-11-20 11:32:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:34,883 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 471 transitions. [2022-11-20 11:32:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 11 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 11:32:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 471 transitions. [2022-11-20 11:32:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:32:34,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:34,892 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1] [2022-11-20 11:32:34,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:35,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:32:35,310 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:32:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:35,311 INFO L85 PathProgramCache]: Analyzing trace with hash -637360369, now seen corresponding path program 4 times [2022-11-20 11:32:35,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:32:35,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921784016] [2022-11-20 11:32:35,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:32:35,311 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 [2022-11-20 11:32:35,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:32:35,312 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:32:35,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Waiting until timeout for monitored process [2022-11-20 11:32:36,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:32:36,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:36,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:32:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:36,165 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 7 [2022-11-20 11:32:36,171 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 [2022-11-20 11:32:36,247 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5141 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5141))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:36,280 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 7 [2022-11-20 11:32:36,344 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:36,465 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:32:36,465 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 [2022-11-20 11:32:36,479 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_396 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_396 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_396 nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:36,579 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_396 (_ BitVec 32)) (v_ArrVal_5141 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_396 nondet_tree_~n~0.base)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_397)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_397 v_ArrVal_5141) v_nondet_tree_~n~0.base_396 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-20 11:32:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:32:36,827 INFO L321 Elim1Store]: treesize reduction 53, result has 25.4 percent of original size [2022-11-20 11:32:36,828 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 2 case distinctions, treesize of input 18 treesize of output 31 [2022-11-20 11:32:36,848 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:32:36,849 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 [2022-11-20 11:32:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 178 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 63 not checked. [2022-11-20 11:32:36,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:37,329 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 10 treesize of output 8 [2022-11-20 11:32:39,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:32:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921784016] [2022-11-20 11:32:39,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921784016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371868304] [2022-11-20 11:32:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:32:39,896 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:32:39,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:32:39,897 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:32:39,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-20 11:32:41,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:32:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:32:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:41,279 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 [2022-11-20 11:32:41,285 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 [2022-11-20 11:32:41,332 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5333 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5333))) (exists ((v_ArrVal_5332 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5332) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:41,375 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5334 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5334) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:41,401 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 [2022-11-20 11:32:41,464 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5334 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_417 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_417) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_417 v_ArrVal_5334) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-20 11:32:41,566 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5334 (_ BitVec 32)) (v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (v_ArrVal_5332 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5333 (_ BitVec 1)) (v_nondet_tree_~n~0.base_417 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5333) v_nondet_tree_~n~0.base_417) (_ bv0 1)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5332) v_nondet_tree_~n~0.base_417 v_ArrVal_5334) v_nondet_tree_~n~0.base_418 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:32:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:32:41,798 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 11:32:41,798 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 [2022-11-20 11:32:41,866 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 11:32:41,867 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 [2022-11-20 11:32:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 10 refuted. 0 times theorem prover too weak. 74 trivial. 66 not checked. [2022-11-20 11:32:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:44,378 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset))) (and (or (forall ((v_ArrVal_5348 (_ BitVec 1)) (v_nondet_tree_~n~0.base_436 (_ BitVec 32)) (v_nondet_tree_~n~0.base_437 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_436) (_ bv0 1))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_436 v_ArrVal_5348) v_nondet_tree_~n~0.base_437))))) (bvule (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset) .cse0)) (forall ((v_nondet_tree_~n~0.base_436 (_ BitVec 32))) (or (forall ((v_ArrVal_5348 (_ BitVec 1)) (v_nondet_tree_~n~0.base_437 (_ BitVec 32))) (or (forall ((v_ArrVal_5347 (_ BitVec 32)) (v_ArrVal_5346 (_ BitVec 32)) (v_nondet_tree_~n~0.base_435 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_436 v_ArrVal_5347) v_nondet_tree_~n~0.base_437 v_ArrVal_5346) v_nondet_tree_~n~0.base_435 (_ bv12 32)) c_nondet_tree_~n~0.base))) (not (= (_ bv0 1) (select (store |c_#valid| v_nondet_tree_~n~0.base_436 v_ArrVal_5348) v_nondet_tree_~n~0.base_437))))) (not (= (select |c_#valid| v_nondet_tree_~n~0.base_436) (_ bv0 1))))))) is different from false [2022-11-20 11:32:44,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371868304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:44,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:32:44,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-20 11:32:44,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380381020] [2022-11-20 11:32:44,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:44,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:32:44,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:32:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:32:44,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=75, Unknown=11, NotChecked=250, Total=380 [2022-11-20 11:32:44,385 INFO L87 Difference]: Start difference. First operand 294 states and 471 transitions. Second operand has 17 states, 16 states have (on average 4.125) internal successors, (66), 14 states have internal predecessors, (66), 12 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-20 11:32:44,623 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))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:32:45,076 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5334 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_417 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_417) (_ bv0 1)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_417 v_ArrVal_5334) nondet_tree_~n~0.base (_ bv12 32))))) (exists ((v_nondet_tree_~n~0.base_396 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_396 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (not (= v_nondet_tree_~n~0.base_396 nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:32:45,085 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5334 (_ BitVec 32)) (v_nondet_tree_~n~0.base_418 (_ BitVec 32)) (v_ArrVal_5332 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5333 (_ BitVec 1)) (v_nondet_tree_~n~0.base_417 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5333) v_nondet_tree_~n~0.base_417) (_ bv0 1)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_5332) v_nondet_tree_~n~0.base_417 v_ArrVal_5334) v_nondet_tree_~n~0.base_418 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_nondet_tree_~n~0.base_397 (_ BitVec 32)) (v_nondet_tree_~n~0.base_396 (_ BitVec 32)) (v_ArrVal_5141 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (not (= v_nondet_tree_~n~0.base_396 nondet_tree_~n~0.base)) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_397)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_397 v_ArrVal_5141) v_nondet_tree_~n~0.base_396 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)))))) is different from true [2022-11-20 11:32:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:45,089 INFO L93 Difference]: Finished difference Result 316 states and 502 transitions. [2022-11-20 11:32:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:32:45,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.125) internal successors, (66), 14 states have internal predecessors, (66), 12 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) Word has length 87 [2022-11-20 11:32:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:45,090 INFO L225 Difference]: With dead ends: 316 [2022-11-20 11:32:45,091 INFO L226 Difference]: Without dead ends: 316 [2022-11-20 11:32:45,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=65, Invalid=105, Unknown=14, NotChecked=416, Total=600 [2022-11-20 11:32:45,091 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 88 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:45,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 107 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 172 Invalid, 0 Unknown, 1143 Unchecked, 0.4s Time] [2022-11-20 11:32:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-20 11:32:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2022-11-20 11:32:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 218 states have (on average 1.2431192660550459) internal successors, (271), 237 states have internal predecessors, (271), 44 states have call successors, (44), 19 states have call predecessors, (44), 34 states have return successors, (179), 55 states have call predecessors, (179), 44 states have call successors, (179) [2022-11-20 11:32:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 494 transitions. [2022-11-20 11:32:45,127 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 494 transitions. Word has length 87 [2022-11-20 11:32:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:45,128 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 494 transitions. [2022-11-20 11:32:45,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.125) internal successors, (66), 14 states have internal predecessors, (66), 12 states have call successors, (16), 3 states have call predecessors, (16), 8 states have return successors, (16), 9 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-20 11:32:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 494 transitions. [2022-11-20 11:32:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 11:32:45,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:45,130 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 11:32:45,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:45,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:32:45,548 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:32:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1929656099, now seen corresponding path program 5 times [2022-11-20 11:32:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:32:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718404698] [2022-11-20 11:32:45,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:32:45,549 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 [2022-11-20 11:32:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:32:45,550 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:32:45,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Waiting until timeout for monitored process [2022-11-20 11:32:46,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 11:32:46,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:32:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:46,925 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 [2022-11-20 11:32:46,977 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5500 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5500))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:32:47,002 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5501 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5501))) is different from true [2022-11-20 11:32:47,017 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5502 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5502) |c_#valid|)) is different from true [2022-11-20 11:32:47,091 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 [2022-11-20 11:32:47,118 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5501 (_ BitVec 1)) (v_nondet_tree_~n~0.base_438 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_5501) v_nondet_tree_~n~0.base_438 (_ bv1 1)))) is different from true [2022-11-20 11:32:47,223 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5501 (_ BitVec 1)) (v_nondet_tree_~n~0.base_438 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5501) v_nondet_tree_~n~0.base_438 (_ bv1 1)))) (and (= .cse0 |c_#valid|) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-20 11:32:51,655 INFO L321 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2022-11-20 11:32:51,656 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 [2022-11-20 11:32:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 84 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 57 not checked. [2022-11-20 11:32:51,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:52,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:32:52,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718404698] [2022-11-20 11:32:52,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718404698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:52,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [428695919] [2022-11-20 11:32:52,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:32:52,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:32:52,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:32:52,042 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:32:52,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-20 11:32:53,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:32:53,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121407063] [2022-11-20 11:32:53,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:32:53,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:53,443 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:53,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 11:32:53,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 1 [2022-11-20 11:33:53,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 11:33:53,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:33:53,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:53,281 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 [2022-11-20 11:33:53,545 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_5816 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5816))))) is different from true [2022-11-20 11:33:53,578 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5816 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5816)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:33:56,158 INFO L321 Elim1Store]: treesize reduction 153, result has 18.2 percent of original size [2022-11-20 11:33:56,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 47 treesize of output 67 [2022-11-20 11:33:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 33 not checked. [2022-11-20 11:33:56,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:00,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121407063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:00,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:34:00,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-11-20 11:34:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811885802] [2022-11-20 11:34:00,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:00,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:34:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:34:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=142, Unknown=13, NotChecked=248, Total=462 [2022-11-20 11:34:00,603 INFO L87 Difference]: Start difference. First operand 312 states and 494 transitions. Second operand has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (17), 11 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-20 11:34:12,797 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5816 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5816)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5501 (_ BitVec 1)) (v_nondet_tree_~n~0.base_438 (_ BitVec 32))) (let ((.cse0 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5501) v_nondet_tree_~n~0.base_438 (_ bv1 1)))) (and (= .cse0 |c_#valid|) (= (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) (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 [2022-11-20 11:34:17,202 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5816 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_459 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_459 (_ bv1 1)))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_459)) (= |c_#valid| (store .cse0 nondet_tree_~n~0.base v_ArrVal_5816)) (= (_ bv0 1) (select .cse0 nondet_tree_~n~0.base))))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_5501 (_ BitVec 1)) (v_nondet_tree_~n~0.base_438 (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_5501) v_nondet_tree_~n~0.base_438 (_ bv1 1)))) (and (= .cse1 |c_#valid|) (= (bvadd (select .cse1 nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)))))) is different from true [2022-11-20 11:34:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:17,257 INFO L93 Difference]: Finished difference Result 321 states and 507 transitions. [2022-11-20 11:34:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:34:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (17), 11 states have call predecessors, (17), 13 states have call successors, (17) Word has length 73 [2022-11-20 11:34:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:17,260 INFO L225 Difference]: With dead ends: 321 [2022-11-20 11:34:17,260 INFO L226 Difference]: Without dead ends: 321 [2022-11-20 11:34:17,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 134 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=111, Invalid=286, Unknown=23, NotChecked=450, Total=870 [2022-11-20 11:34:17,261 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1026 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:17,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 102 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 1026 Unchecked, 0.3s Time] [2022-11-20 11:34:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-20 11:34:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 312. [2022-11-20 11:34:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 218 states have (on average 1.2431192660550459) internal successors, (271), 237 states have internal predecessors, (271), 44 states have call successors, (44), 19 states have call predecessors, (44), 34 states have return successors, (179), 55 states have call predecessors, (179), 44 states have call successors, (179) [2022-11-20 11:34:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 494 transitions. [2022-11-20 11:34:17,276 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 494 transitions. Word has length 73 [2022-11-20 11:34:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:17,276 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 494 transitions. [2022-11-20 11:34:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 13 states have call successors, (17), 2 states have call predecessors, (17), 8 states have return successors, (17), 11 states have call predecessors, (17), 13 states have call successors, (17) [2022-11-20 11:34:17,277 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 494 transitions. [2022-11-20 11:34:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 11:34:17,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:17,278 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1] [2022-11-20 11:34:17,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:17,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:17,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:17,695 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:34:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:17,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1266609480, now seen corresponding path program 8 times [2022-11-20 11:34:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526339922] [2022-11-20 11:34:17,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:34:17,696 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 [2022-11-20 11:34:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:17,697 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:34:17,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (61)] Waiting until timeout for monitored process [2022-11-20 11:34:18,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:34:18,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:34:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:18,662 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 [2022-11-20 11:34:18,669 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 [2022-11-20 11:34:18,784 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_6049 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6049) |c_#length|)))) is different from true [2022-11-20 11:34:18,826 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 [2022-11-20 11:34:18,896 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_480 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_480 (_ bv12 32)) |c_#length|)) is different from true [2022-11-20 11:34:18,945 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_481 (_ BitVec 32)) (v_ArrVal_6049 (_ BitVec 32)) (v_nondet_tree_~n~0.base_480 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6049) v_nondet_tree_~n~0.base_481 (_ bv12 32)) v_nondet_tree_~n~0.base_480 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:34:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:19,116 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-20 11:34:19,117 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 18 treesize of output 31 [2022-11-20 11:34:19,140 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:34:19,140 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 [2022-11-20 11:34:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 239 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 78 not checked. [2022-11-20 11:34:19,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:19,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526339922] [2022-11-20 11:34:19,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526339922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1490998502] [2022-11-20 11:34:19,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:34:19,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:34:19,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:34:19,672 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:34:19,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-20 11:34:21,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:34:21,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 11:34:21,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:21,206 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 [2022-11-20 11:34:21,214 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 [2022-11-20 11:34:21,311 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6279 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6279) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_6278 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6278) |c_#length|)))) is different from true [2022-11-20 11:34:21,350 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6280 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6280))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:34:21,433 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_501 (_ BitVec 32)) (v_ArrVal_6280 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_501 v_ArrVal_6280) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_501)))) is different from true [2022-11-20 11:34:21,529 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6278 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_501 (_ BitVec 32)) (v_ArrVal_6279 (_ BitVec 1)) (v_ArrVal_6280 (_ BitVec 32)) (v_nondet_tree_~n~0.base_502 (_ BitVec 32))) (and (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6278) v_nondet_tree_~n~0.base_501 v_ArrVal_6280) v_nondet_tree_~n~0.base_502 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6279) v_nondet_tree_~n~0.base_501)))) is different from true [2022-11-20 11:34:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:21,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:21,785 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 11:34:21,786 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 [2022-11-20 11:34:21,840 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 11:34:21,840 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 [2022-11-20 11:34:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 239 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 81 not checked. [2022-11-20 11:34:21,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:24,286 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv12 32) c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.base_521 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_521) (_ bv0 1))) (forall ((v_nondet_tree_~n~0.base_519 (_ BitVec 32)) (v_ArrVal_6292 (_ BitVec 1))) (or (forall ((v_ArrVal_6294 (_ BitVec 32)) (v_nondet_tree_~n~0.base_520 (_ BitVec 32)) (v_ArrVal_6293 (_ BitVec 32))) (bvule .cse0 (select (store (store (store |c_#length| v_nondet_tree_~n~0.base_521 v_ArrVal_6294) v_nondet_tree_~n~0.base_519 v_ArrVal_6293) v_nondet_tree_~n~0.base_520 (_ bv12 32)) c_nondet_tree_~n~0.base))) (not (= (select (store |c_#valid| v_nondet_tree_~n~0.base_521 v_ArrVal_6292) v_nondet_tree_~n~0.base_519) (_ bv0 1))))))) (or (bvule (bvadd (_ bv8 32) c_nondet_tree_~n~0.offset) .cse0) (forall ((v_nondet_tree_~n~0.base_519 (_ BitVec 32)) (v_ArrVal_6292 (_ BitVec 1)) (v_nondet_tree_~n~0.base_521 (_ BitVec 32))) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_521) (_ bv0 1))) (not (= (select (store |c_#valid| v_nondet_tree_~n~0.base_521 v_ArrVal_6292) v_nondet_tree_~n~0.base_519) (_ bv0 1)))))))) is different from false [2022-11-20 11:34:24,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1490998502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:24,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:34:24,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-11-20 11:34:24,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352800304] [2022-11-20 11:34:24,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:24,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:34:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:34:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=47, Unknown=9, NotChecked=180, Total=272 [2022-11-20 11:34:24,294 INFO L87 Difference]: Start difference. First operand 312 states and 494 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (14), 3 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 11:34:24,656 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_480 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= (store (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) v_nondet_tree_~n~0.base_480 (_ bv12 32)) |c_#length|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_501 (_ BitVec 32)) (v_ArrVal_6280 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_501 v_ArrVal_6280) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_501))))) is different from true [2022-11-20 11:34:24,663 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6278 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_501 (_ BitVec 32)) (v_ArrVal_6279 (_ BitVec 1)) (v_ArrVal_6280 (_ BitVec 32)) (v_nondet_tree_~n~0.base_502 (_ BitVec 32))) (and (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6278) v_nondet_tree_~n~0.base_501 v_ArrVal_6280) v_nondet_tree_~n~0.base_502 (_ bv12 32))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6279) v_nondet_tree_~n~0.base_501)))) (exists ((v_nondet_tree_~n~0.base_481 (_ BitVec 32)) (v_ArrVal_6049 (_ BitVec 32)) (v_nondet_tree_~n~0.base_480 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_6049) v_nondet_tree_~n~0.base_481 (_ bv12 32)) v_nondet_tree_~n~0.base_480 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:34:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:24,666 INFO L93 Difference]: Finished difference Result 317 states and 503 transitions. [2022-11-20 11:34:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:34:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (14), 3 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) Word has length 101 [2022-11-20 11:34:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:24,669 INFO L225 Difference]: With dead ends: 317 [2022-11-20 11:34:24,669 INFO L226 Difference]: Without dead ends: 317 [2022-11-20 11:34:24,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=53, Invalid=69, Unknown=12, NotChecked=286, Total=420 [2022-11-20 11:34:24,670 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 86 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 741 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:24,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 63 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 113 Invalid, 0 Unknown, 741 Unchecked, 0.2s Time] [2022-11-20 11:34:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-20 11:34:24,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 308. [2022-11-20 11:34:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 215 states have (on average 1.2465116279069768) internal successors, (268), 234 states have internal predecessors, (268), 44 states have call successors, (44), 19 states have call predecessors, (44), 33 states have return successors, (174), 54 states have call predecessors, (174), 44 states have call successors, (174) [2022-11-20 11:34:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 486 transitions. [2022-11-20 11:34:24,684 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 486 transitions. Word has length 101 [2022-11-20 11:34:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:24,684 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 486 transitions. [2022-11-20 11:34:24,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (14), 3 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-20 11:34:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 486 transitions. [2022-11-20 11:34:24,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 11:34:24,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:24,686 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:24,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:24,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (61)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:25,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:34:25,100 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting maxErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:34:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1495106675, now seen corresponding path program 1 times [2022-11-20 11:34:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741563813] [2022-11-20 11:34:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:25,100 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 [2022-11-20 11:34:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:25,101 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:34:25,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (63)] Waiting until timeout for monitored process [2022-11-20 11:34:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:25,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:34:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:34:25,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:27,409 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 8 treesize of output 6 [2022-11-20 11:34:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:34:27,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:27,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741563813] [2022-11-20 11:34:27,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741563813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:27,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:34:27,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-20 11:34:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910647797] [2022-11-20 11:34:27,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:27,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:34:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:34:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:34:27,562 INFO L87 Difference]: Start difference. First operand 308 states and 486 transitions. Second operand has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:34:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:31,722 INFO L93 Difference]: Finished difference Result 346 states and 536 transitions. [2022-11-20 11:34:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:34:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2022-11-20 11:34:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:31,724 INFO L225 Difference]: With dead ends: 346 [2022-11-20 11:34:31,725 INFO L226 Difference]: Without dead ends: 346 [2022-11-20 11:34:31,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:34:31,725 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 147 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:31,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 154 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 698 Invalid, 0 Unknown, 174 Unchecked, 3.6s Time] [2022-11-20 11:34:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-20 11:34:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 312. [2022-11-20 11:34:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 218 states have (on average 1.2339449541284404) internal successors, (269), 237 states have internal predecessors, (269), 44 states have call successors, (44), 20 states have call predecessors, (44), 34 states have return successors, (174), 54 states have call predecessors, (174), 44 states have call successors, (174) [2022-11-20 11:34:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 487 transitions. [2022-11-20 11:34:31,739 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 487 transitions. Word has length 48 [2022-11-20 11:34:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:31,739 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 487 transitions. [2022-11-20 11:34:31,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 7 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:34:31,740 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 487 transitions. [2022-11-20 11:34:31,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:34:31,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:31,746 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] [2022-11-20 11:34:31,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (63)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:31,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:34:31,960 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:34:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash -407980419, now seen corresponding path program 3 times [2022-11-20 11:34:31,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:31,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882317505] [2022-11-20 11:34:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:34:31,961 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 [2022-11-20 11:34:31,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:31,962 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:34:31,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (64)] Waiting until timeout for monitored process [2022-11-20 11:34:32,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:34:32,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 11:34:32,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:32,513 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 [2022-11-20 11:34:32,620 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 [2022-11-20 11:34:32,630 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 [2022-11-20 11:34:33,008 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6420 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_6420) |c_#memory_$Pointer$.offset|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_6421 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_6421) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-20 11:34:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:33,049 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 16 treesize of output 18 [2022-11-20 11:34:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:33,059 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 16 treesize of output 18 [2022-11-20 11:34:33,081 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:34:33,082 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 [2022-11-20 11:34:33,133 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 23 treesize of output 22 [2022-11-20 11:34:33,143 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 [2022-11-20 11:34:33,523 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 [2022-11-20 11:34:33,526 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 [2022-11-20 11:34:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-20 11:34:33,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:35,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:34:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882317505] [2022-11-20 11:34:35,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882317505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:35,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1784906365] [2022-11-20 11:34:35,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:34:35,984 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:34:35,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:34:35,985 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:34:35,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-20 11:34:36,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:34:36,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:36,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 11:34:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:37,122 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 [2022-11-20 11:34:37,129 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 [2022-11-20 11:34:37,688 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 11:34:37,699 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 11:34:37,904 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-20 11:34:37,914 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-11-20 11:34:37,925 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| c_nondet_tree_~n~0.base v_arrayElimArr_3)) (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32)))) (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32)) (= (store |c_old(#memory_$Pointer$.base)| c_nondet_tree_~n~0.base v_arrayElimArr_4) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-20 11:34:37,944 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store |c_old(#memory_$Pointer$.offset)| |c_nondet_tree_#res.base| v_arrayElimArr_3) |c_#memory_$Pointer$.offset|) (= (select v_arrayElimArr_3 (_ bv4 32)) (_ bv0 32)))) (exists ((v_arrayElimArr_4 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select v_arrayElimArr_4 (_ bv4 32)) (_ bv0 32)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_nondet_tree_#res.base| v_arrayElimArr_4))))) is different from true [2022-11-20 11:34:37,992 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:34:37,992 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 11:34:37,997 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 7 treesize of output 3 [2022-11-20 11:34:38,048 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:34:38,048 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 11:34:38,058 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 7 treesize of output 3 [2022-11-20 11:34:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:34:38,265 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:34:38,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 11:34:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:34:38,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:34:38,281 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-20 11:34:38,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-11-20 11:34:39,354 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:34:39,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 20 [2022-11-20 11:34:39,361 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:34:39,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 11:34:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-11-20 11:34:39,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:45,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:34:45,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-11-20 11:34:45,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:34:45,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-11-20 11:34:45,754 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_nondet_tree_~n~0.offset))) (and (forall ((|v_nondet_tree_#t~ret9.base_630| (_ BitVec 32)) (v_arrayElimArr_6 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.base| |v_nondet_tree_#t~ret9.base_630| v_arrayElimArr_6) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)) (not (= (select v_arrayElimArr_6 (_ bv4 32)) (_ bv0 32))))) (forall ((|v_nondet_tree_#t~ret9.base_630| (_ BitVec 32)) (v_arrayElimArr_5 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |v_nondet_tree_#t~ret9.base_630| v_arrayElimArr_5) c_nondet_tree_~n~0.base) .cse0) (_ bv0 32)) (not (= (select v_arrayElimArr_5 (_ bv4 32)) (_ bv0 32))))))) is different from false [2022-11-20 11:34:45,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1784906365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:45,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:34:45,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 39 [2022-11-20 11:34:45,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644658248] [2022-11-20 11:34:45,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:45,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:34:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:34:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:34:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=16, NotChecked=292, Total=1640 [2022-11-20 11:34:45,769 INFO L87 Difference]: Start difference. First operand 312 states and 487 transitions. Second operand has 39 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 28 states have internal predecessors, (57), 11 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 11:34:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:51,529 INFO L93 Difference]: Finished difference Result 350 states and 533 transitions. [2022-11-20 11:34:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 11:34:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 28 states have internal predecessors, (57), 11 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-11-20 11:34:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:51,532 INFO L225 Difference]: With dead ends: 350 [2022-11-20 11:34:51,533 INFO L226 Difference]: Without dead ends: 350 [2022-11-20 11:34:51,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=287, Invalid=3013, Unknown=22, NotChecked=460, Total=3782 [2022-11-20 11:34:51,534 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 251 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:51,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 429 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1711 Invalid, 0 Unknown, 548 Unchecked, 3.7s Time] [2022-11-20 11:34:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-20 11:34:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 332. [2022-11-20 11:34:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 233 states have (on average 1.2274678111587982) internal successors, (286), 252 states have internal predecessors, (286), 47 states have call successors, (47), 22 states have call predecessors, (47), 36 states have return successors, (178), 57 states have call predecessors, (178), 47 states have call successors, (178) [2022-11-20 11:34:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 511 transitions. [2022-11-20 11:34:51,549 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 511 transitions. Word has length 45 [2022-11-20 11:34:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:51,550 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 511 transitions. [2022-11-20 11:34:51,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 28 states have internal predecessors, (57), 11 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-20 11:34:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 511 transitions. [2022-11-20 11:34:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:34:51,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:51,552 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1] [2022-11-20 11:34:51,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-20 11:34:51,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (64)] Ended with exit code 0 [2022-11-20 11:34:51,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:34:51,965 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:34:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1922751474, now seen corresponding path program 5 times [2022-11-20 11:34:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:34:51,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086886835] [2022-11-20 11:34:51,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:34:51,966 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 [2022-11-20 11:34:51,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:34:51,967 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:34:51,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (66)] Waiting until timeout for monitored process [2022-11-20 11:34:53,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 11:34:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:53,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:34:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:53,395 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 [2022-11-20 11:34:53,423 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6779 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6779))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:34:53,452 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6779 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6779)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:34:53,477 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_6780 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6780))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:34:53,498 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6781 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6781) |c_#valid|)) is different from true [2022-11-20 11:34:58,082 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-20 11:34:58,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 77 [2022-11-20 11:34:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 31 refuted. 4 times theorem prover too weak. 84 trivial. 31 not checked. [2022-11-20 11:34:58,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:35:00,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:35:00,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086886835] [2022-11-20 11:35:00,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086886835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:35:00,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1336529716] [2022-11-20 11:35:00,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:35:00,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:35:00,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:35:00,429 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:35:00,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-20 11:35:01,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:35:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060916044] [2022-11-20 11:35:01,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:35:01,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:35:01,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:35:01,795 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:35:01,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-20 11:35:01,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 1 [2022-11-20 11:36:27,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 11:36:27,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:36:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:36:27,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:27,412 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7159 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7159))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:36:27,436 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7160 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7160))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:36:27,464 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7160)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:36:27,529 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_578 (_ BitVec 32)) (v_ArrVal_7159 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_578 v_ArrVal_7159))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_578)) (= |c_#valid| (store .cse0 nondet_tree_~n~0.base v_ArrVal_7160)) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1))))) is different from true [2022-11-20 11:36:33,973 INFO L321 Elim1Store]: treesize reduction 144, result has 23.0 percent of original size [2022-11-20 11:36:33,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 68 treesize of output 97 [2022-11-20 11:36:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 11 refuted. 0 times theorem prover too weak. 87 trivial. 52 not checked. [2022-11-20 11:36:34,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:40,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060916044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:40,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:36:40,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2022-11-20 11:36:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077929019] [2022-11-20 11:36:40,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:36:40,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:36:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:36:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:36:40,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=119, Unknown=19, NotChecked=232, Total=420 [2022-11-20 11:36:40,468 INFO L87 Difference]: Start difference. First operand 332 states and 511 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 13 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-20 11:36:44,594 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6779 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6779)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (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_7158 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7158))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_6781 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6781) |c_#valid|)) (exists ((v_ArrVal_7160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7160)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:36:44,598 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_6781 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_6781) |c_#valid|)) (exists ((v_ArrVal_7160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7160)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:36:44,602 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_6781 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_6781))))) (exists ((v_ArrVal_7160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7160)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:36:44,838 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_7160 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_578 (_ BitVec 32)) (v_ArrVal_7159 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_578 v_ArrVal_7159))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_578)) (= |c_#valid| (store .cse0 nondet_tree_~n~0.base v_ArrVal_7160)) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1))))) (exists ((v_ArrVal_6780 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_6781 (_ BitVec 1)) (v_nondet_tree_~n~0.base_557 (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_557 v_ArrVal_6780) nondet_tree_~n~0.base v_ArrVal_6781) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_557))))) is different from true [2022-11-20 11:36:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:36:44,842 INFO L93 Difference]: Finished difference Result 342 states and 546 transitions. [2022-11-20 11:36:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:36:44,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 13 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) Word has length 87 [2022-11-20 11:36:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:36:44,845 INFO L225 Difference]: With dead ends: 342 [2022-11-20 11:36:44,845 INFO L226 Difference]: Without dead ends: 342 [2022-11-20 11:36:44,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 155 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=68, Invalid=138, Unknown=24, NotChecked=420, Total=650 [2022-11-20 11:36:44,846 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 49 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:36:44,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 1143 Unchecked, 0.2s Time] [2022-11-20 11:36:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-20 11:36:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2022-11-20 11:36:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 240 states have (on average 1.225) internal successors, (294), 258 states have internal predecessors, (294), 47 states have call successors, (47), 22 states have call predecessors, (47), 38 states have return successors, (205), 60 states have call predecessors, (205), 47 states have call successors, (205) [2022-11-20 11:36:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 546 transitions. [2022-11-20 11:36:44,862 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 546 transitions. Word has length 87 [2022-11-20 11:36:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:36:44,863 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 546 transitions. [2022-11-20 11:36:44,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 13 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-20 11:36:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 546 transitions. [2022-11-20 11:36:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 11:36:44,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:36:44,866 INFO L195 NwaCegarLoop]: trace histogram [11, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1] [2022-11-20 11:36:44,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:45,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (66)] Forceful destruction successful, exit code 0 [2022-11-20 11:36:45,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:36:45,279 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:36:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:36:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1922751473, now seen corresponding path program 5 times [2022-11-20 11:36:45,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:36:45,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070737195] [2022-11-20 11:36:45,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:36:45,280 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 [2022-11-20 11:36:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:36:45,281 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:36:45,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (69)] Waiting until timeout for monitored process [2022-11-20 11:36:46,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 11:36:46,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:36:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 11:36:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:36:46,748 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 [2022-11-20 11:36:46,755 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 [2022-11-20 11:36:46,837 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7358 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7358) |c_#length|)) (exists ((v_ArrVal_7359 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7359) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:36:46,897 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7358 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7359 (_ BitVec 1))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7358) |c_#length|) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7359) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:36:46,943 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_7360 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7360) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:36:46,979 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 [2022-11-20 11:36:47,050 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_599 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7360 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_599)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_599 v_ArrVal_7360) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 11:36:47,146 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7358 (_ BitVec 32)) (v_nondet_tree_~n~0.base_599 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_600 (_ BitVec 32)) (v_ArrVal_7360 (_ BitVec 32)) (v_ArrVal_7359 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_600)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_600 v_ArrVal_7359) v_nondet_tree_~n~0.base_599)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_600 v_ArrVal_7358) v_nondet_tree_~n~0.base_599 v_ArrVal_7360) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-20 11:36:47,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:36:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:36:47,320 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 11:36:47,320 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 [2022-11-20 11:36:47,388 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 11:36:47,388 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 [2022-11-20 11:36:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 18 refuted. 0 times theorem prover too weak. 66 trivial. 66 not checked. [2022-11-20 11:36:47,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:36:50,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:36:50,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070737195] [2022-11-20 11:36:50,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070737195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:36:50,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512181694] [2022-11-20 11:36:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:36:50,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:36:50,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:36:50,110 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:36:50,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-20 11:36:51,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:36:51,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698465001] [2022-11-20 11:36:51,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:36:51,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:36:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:36:51,606 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:36:51,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-20 11:36:51,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 1 [2022-11-20 11:39:23,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-20 11:39:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 11:39:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:23,208 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 [2022-11-20 11:39:23,575 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_7738 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7738) |c_#length|)))) is different from true [2022-11-20 11:39:23,620 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7738 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7738) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:39:23,721 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7734 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_620 (_ BitVec 32)) (v_ArrVal_7738 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7734) v_nondet_tree_~n~0.base_620 v_ArrVal_7738) |c_#length|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_620) (_ bv0 1)))) is different from true [2022-11-20 11:39:23,905 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7734 (_ BitVec 32)) (v_nondet_tree_~n~0.base_621 (_ BitVec 32)) (v_ArrVal_7739 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_620 (_ BitVec 32)) (v_ArrVal_7738 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_621 (_ bv1 1)))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_621) (_ bv0 1)) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_621 v_ArrVal_7739) nondet_tree_~n~0.base v_ArrVal_7734) v_nondet_tree_~n~0.base_620 v_ArrVal_7738) |c_#length|) (= (select (store .cse0 nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_620) (_ bv0 1))))) is different from true [2022-11-20 11:39:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:24,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:24,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 11:39:24,109 INFO L321 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2022-11-20 11:39:24,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 39 [2022-11-20 11:39:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 177 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 56 not checked. [2022-11-20 11:39:24,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:31,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698465001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:31,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:31,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-11-20 11:39:31,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240196582] [2022-11-20 11:39:31,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:31,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:39:31,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:39:31,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:39:31,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=93, Unknown=11, NotChecked=270, Total=420 [2022-11-20 11:39:31,470 INFO L87 Difference]: Start difference. First operand 341 states and 546 transitions. Second operand has 18 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 18 states have internal predecessors, (69), 12 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (16), 10 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-20 11:39:32,040 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_7738 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7738) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:39:32,392 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_7734 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_620 (_ BitVec 32)) (v_ArrVal_7738 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_7734) v_nondet_tree_~n~0.base_620 v_ArrVal_7738) |c_#length|) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_620) (_ bv0 1)))) (exists ((v_nondet_tree_~n~0.base_599 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_7360 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_599)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_599 v_ArrVal_7360) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)))) is different from true [2022-11-20 11:39:32,408 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_7734 (_ BitVec 32)) (v_nondet_tree_~n~0.base_621 (_ BitVec 32)) (v_ArrVal_7739 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_620 (_ BitVec 32)) (v_ArrVal_7738 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_nondet_tree_~n~0.base_621 (_ bv1 1)))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_621) (_ bv0 1)) (= (select .cse0 nondet_tree_~n~0.base) (_ bv0 1)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_621 v_ArrVal_7739) nondet_tree_~n~0.base v_ArrVal_7734) v_nondet_tree_~n~0.base_620 v_ArrVal_7738) |c_#length|) (= (select (store .cse0 nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_620) (_ bv0 1))))) (exists ((v_ArrVal_7358 (_ BitVec 32)) (v_nondet_tree_~n~0.base_599 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_600 (_ BitVec 32)) (v_ArrVal_7360 (_ BitVec 32)) (v_ArrVal_7359 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_600)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_600 v_ArrVal_7359) v_nondet_tree_~n~0.base_599)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_600 v_ArrVal_7358) v_nondet_tree_~n~0.base_599 v_ArrVal_7360) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|)))) is different from true [2022-11-20 11:39:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:32,412 INFO L93 Difference]: Finished difference Result 341 states and 545 transitions. [2022-11-20 11:39:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:39:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 18 states have internal predecessors, (69), 12 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (16), 10 states have call predecessors, (16), 12 states have call successors, (16) Word has length 87 [2022-11-20 11:39:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:32,415 INFO L225 Difference]: With dead ends: 341 [2022-11-20 11:39:32,415 INFO L226 Difference]: Without dead ends: 341 [2022-11-20 11:39:32,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=69, Invalid=151, Unknown=14, NotChecked=468, Total=702 [2022-11-20 11:39:32,416 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:32,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 83 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 1064 Unchecked, 0.4s Time] [2022-11-20 11:39:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-20 11:39:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2022-11-20 11:39:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 239 states have (on average 1.2217573221757323) internal successors, (292), 258 states have internal predecessors, (292), 47 states have call successors, (47), 22 states have call predecessors, (47), 38 states have return successors, (205), 59 states have call predecessors, (205), 47 states have call successors, (205) [2022-11-20 11:39:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 544 transitions. [2022-11-20 11:39:32,439 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 544 transitions. Word has length 87 [2022-11-20 11:39:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:32,439 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 544 transitions. [2022-11-20 11:39:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 18 states have internal predecessors, (69), 12 states have call successors, (16), 3 states have call predecessors, (16), 9 states have return successors, (16), 10 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-20 11:39:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 544 transitions. [2022-11-20 11:39:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 11:39:32,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:32,442 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 11:39:32,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:32,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (69)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:32,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:39:32,867 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:39:32,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash -261677030, now seen corresponding path program 6 times [2022-11-20 11:39:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:39:32,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18569177] [2022-11-20 11:39:32,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:39:32,868 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 [2022-11-20 11:39:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:39:32,869 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:39:32,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (72)] Waiting until timeout for monitored process [2022-11-20 11:39:33,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 11:39:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:34,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:39:34,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:34,016 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 [2022-11-20 11:39:34,049 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7911 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7911) |c_#valid|)) is different from true [2022-11-20 11:39:34,066 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7912 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7912))) is different from true [2022-11-20 11:39:34,134 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 [2022-11-20 11:39:34,152 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7911 (_ BitVec 1)) (v_nondet_tree_~n~0.base_641 (_ BitVec 32))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7911) v_nondet_tree_~n~0.base_641 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 11:39:34,180 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7913 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7913))) is different from true [2022-11-20 11:39:34,293 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7911 (_ BitVec 1)) (v_nondet_tree_~n~0.base_641 (_ BitVec 32)) (v_nondet_tree_~n~0.base_642 (_ BitVec 32))) (= |c_#valid| (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7911) v_nondet_tree_~n~0.base_641 (_ bv1 1)) v_nondet_tree_~n~0.base_642 (_ bv1 1)))) is different from true [2022-11-20 11:39:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:39:34,500 INFO L321 Elim1Store]: treesize reduction 71, result has 29.0 percent of original size [2022-11-20 11:39:34,500 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 3 case distinctions, treesize of input 20 treesize of output 41 [2022-11-20 11:39:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 55 trivial. 52 not checked. [2022-11-20 11:39:34,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:35,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:39:35,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18569177] [2022-11-20 11:39:35,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18569177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:35,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [128464754] [2022-11-20 11:39:35,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:39:35,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:39:35,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:39:35,072 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:39:35,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-20 11:39:36,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:39:36,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658070561] [2022-11-20 11:39:36,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:39:36,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:36,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:36,448 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:36,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-20 11:39:36,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 1 [2022-11-20 11:39:50,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 11:39:50,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:50,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:39:50,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:50,846 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 [2022-11-20 11:39:50,872 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8226 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8226) |c_#valid|)) is different from true [2022-11-20 11:39:50,887 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8227 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8227) |c_#valid|)) is different from true [2022-11-20 11:39:51,078 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8228 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8228) |c_#valid|)) is different from true [2022-11-20 11:39:51,156 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_662 (_ BitVec 32)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_663 (_ BitVec 32))) (= |c_#valid| (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_662 (_ bv1 1)) v_nondet_tree_~n~0.base_663 (_ bv1 1)))) is different from true [2022-11-20 11:39:51,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:39:51,309 INFO L321 Elim1Store]: treesize reduction 71, result has 29.0 percent of original size [2022-11-20 11:39:51,310 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 3 case distinctions, treesize of input 20 treesize of output 41 [2022-11-20 11:39:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 109 proven. 21 refuted. 1 times theorem prover too weak. 53 trivial. 40 not checked. [2022-11-20 11:39:51,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:51,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658070561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:51,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:39:51,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-20 11:39:51,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937148752] [2022-11-20 11:39:51,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:39:51,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:39:51,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:39:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:39:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=66, Unknown=11, NotChecked=250, Total=380 [2022-11-20 11:39:51,765 INFO L87 Difference]: Start difference. First operand 340 states and 544 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 11:39:51,827 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8228 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8228) |c_#valid|)) (exists ((v_ArrVal_8227 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8227) |c_#valid|)) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_7912 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7912)))) is different from true [2022-11-20 11:39:51,831 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_7912 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_7912))))) (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 [2022-11-20 11:39:52,128 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_662 (_ BitVec 32)) (v_ArrVal_8226 (_ BitVec 1)) (v_nondet_tree_~n~0.base_663 (_ BitVec 32))) (= |c_#valid| (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8226) v_nondet_tree_~n~0.base_662 (_ bv1 1)) v_nondet_tree_~n~0.base_663 (_ bv1 1)))) (exists ((v_ArrVal_7911 (_ BitVec 1)) (v_nondet_tree_~n~0.base_641 (_ BitVec 32)) (v_nondet_tree_~n~0.base_642 (_ BitVec 32))) (= |c_#valid| (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_7911) v_nondet_tree_~n~0.base_641 (_ bv1 1)) v_nondet_tree_~n~0.base_642 (_ bv1 1))))) is different from true [2022-11-20 11:39:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:39:52,135 INFO L93 Difference]: Finished difference Result 346 states and 571 transitions. [2022-11-20 11:39:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:39:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 73 [2022-11-20 11:39:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:39:52,137 INFO L225 Difference]: With dead ends: 346 [2022-11-20 11:39:52,138 INFO L226 Difference]: Without dead ends: 346 [2022-11-20 11:39:52,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 14 SemanticMatches, 22 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=79, Unknown=15, NotChecked=390, Total=552 [2022-11-20 11:39:52,138 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 959 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:39:52,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 959 Unchecked, 0.2s Time] [2022-11-20 11:39:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-20 11:39:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2022-11-20 11:39:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 243 states have (on average 1.2222222222222223) internal successors, (297), 261 states have internal predecessors, (297), 47 states have call successors, (47), 22 states have call predecessors, (47), 39 states have return successors, (227), 61 states have call predecessors, (227), 47 states have call successors, (227) [2022-11-20 11:39:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 571 transitions. [2022-11-20 11:39:52,159 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 571 transitions. Word has length 73 [2022-11-20 11:39:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:39:52,159 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 571 transitions. [2022-11-20 11:39:52,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 11 states have call successors, (14), 2 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-20 11:39:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 571 transitions. [2022-11-20 11:39:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:39:52,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:39:52,161 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 11:39:52,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:52,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (72)] Forceful destruction successful, exit code 0 [2022-11-20 11:39:52,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:39:52,583 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:39:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:39:52,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1258636183, now seen corresponding path program 6 times [2022-11-20 11:39:52,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:39:52,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585303162] [2022-11-20 11:39:52,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:39:52,584 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 [2022-11-20 11:39:52,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:39:52,585 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:39:52,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (75)] Waiting until timeout for monitored process [2022-11-20 11:39:53,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 11:39:53,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:39:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:39:53,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:39:53,508 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 [2022-11-20 11:39:53,521 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 [2022-11-20 11:39:53,600 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_8369 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8369) |c_#valid|)) (exists ((v_ArrVal_8370 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8370) |c_#length|)))) is different from true [2022-11-20 11:39:53,647 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8371 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8371) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:39:53,695 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8371 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8371) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:39:53,787 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_683 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8369 (_ BitVec 1)) (v_ArrVal_8370 (_ BitVec 32)) (v_ArrVal_8371 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8369) v_nondet_tree_~n~0.base_683)) (= (_ 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_8370) v_nondet_tree_~n~0.base_683 v_ArrVal_8371)))) is different from true [2022-11-20 11:39:53,839 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 [2022-11-20 11:39:53,920 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_683 (_ BitVec 32)) (v_nondet_tree_~n~0.base_684 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8369 (_ BitVec 1)) (v_ArrVal_8370 (_ BitVec 32)) (v_ArrVal_8371 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8370) v_nondet_tree_~n~0.base_683 v_ArrVal_8371) v_nondet_tree_~n~0.base_684 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8369) v_nondet_tree_~n~0.base_683)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:39:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:39:54,091 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-20 11:39:54,091 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 [2022-11-20 11:39:54,156 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-20 11:39:54,157 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 [2022-11-20 11:39:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 57 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 66 not checked. [2022-11-20 11:39:54,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:39:56,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:39:56,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585303162] [2022-11-20 11:39:56,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585303162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:39:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454746377] [2022-11-20 11:39:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:39:56,880 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:39:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:39:56,881 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:39:56,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-20 11:39:57,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:39:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398546006] [2022-11-20 11:39:57,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:39:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:39:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:39:57,945 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:39:57,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-20 11:39:57,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 1 [2022-11-20 11:40:09,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 11:40:09,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:09,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:40:09,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:09,608 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 [2022-11-20 11:40:09,617 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 [2022-11-20 11:40:09,739 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8644 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8644))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:40:09,775 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8644 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8644)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:40:09,858 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8644 (_ BitVec 32)) (v_ArrVal_8642 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_701 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_701)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8642) v_nondet_tree_~n~0.base_701 v_ArrVal_8644) |c_#length|))) is different from true [2022-11-20 11:40:09,974 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8644 (_ BitVec 32)) (v_ArrVal_8642 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_702 (_ BitVec 32)) (v_nondet_tree_~n~0.base_701 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_701)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8642) v_nondet_tree_~n~0.base_701 v_ArrVal_8644) v_nondet_tree_~n~0.base_702 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:40:10,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:10,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:10,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:40:10,129 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-20 11:40:10,129 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 3 case distinctions, treesize of input 18 treesize of output 32 [2022-11-20 11:40:10,175 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-20 11:40:10,175 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 [2022-11-20 11:40:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 26 trivial. 63 not checked. [2022-11-20 11:40:10,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:13,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398546006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:13,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:40:13,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2022-11-20 11:40:13,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028688647] [2022-11-20 11:40:13,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:13,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:40:13,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:40:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:40:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=75, Unknown=11, NotChecked=250, Total=380 [2022-11-20 11:40:13,061 INFO L87 Difference]: Start difference. First operand 345 states and 571 transitions. Second operand has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 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) [2022-11-20 11:40:13,205 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_8644 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8644)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8371 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8371) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:40:13,494 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_683 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8369 (_ BitVec 1)) (v_ArrVal_8370 (_ BitVec 32)) (v_ArrVal_8371 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8369) v_nondet_tree_~n~0.base_683)) (= (_ 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_8370) v_nondet_tree_~n~0.base_683 v_ArrVal_8371)))) (exists ((v_ArrVal_8644 (_ BitVec 32)) (v_ArrVal_8642 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_701 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_701)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8642) v_nondet_tree_~n~0.base_701 v_ArrVal_8644) |c_#length|)))) is different from true [2022-11-20 11:40:13,502 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_683 (_ BitVec 32)) (v_nondet_tree_~n~0.base_684 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_8369 (_ BitVec 1)) (v_ArrVal_8370 (_ BitVec 32)) (v_ArrVal_8371 (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8370) v_nondet_tree_~n~0.base_683 v_ArrVal_8371) v_nondet_tree_~n~0.base_684 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_8369) v_nondet_tree_~n~0.base_683)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) (exists ((v_ArrVal_8644 (_ BitVec 32)) (v_ArrVal_8642 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_702 (_ BitVec 32)) (v_nondet_tree_~n~0.base_701 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_701)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_8642) v_nondet_tree_~n~0.base_701 v_ArrVal_8644) v_nondet_tree_~n~0.base_702 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:40:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:13,504 INFO L93 Difference]: Finished difference Result 356 states and 587 transitions. [2022-11-20 11:40:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:40:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 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 63 [2022-11-20 11:40:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:13,506 INFO L225 Difference]: With dead ends: 356 [2022-11-20 11:40:13,506 INFO L226 Difference]: Without dead ends: 356 [2022-11-20 11:40:13,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=66, Invalid=103, Unknown=15, NotChecked=416, Total=600 [2022-11-20 11:40:13,507 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 48 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 986 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:13,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 66 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 986 Unchecked, 0.3s Time] [2022-11-20 11:40:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-20 11:40:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2022-11-20 11:40:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 250 states have (on average 1.212) internal successors, (303), 269 states have internal predecessors, (303), 48 states have call successors, (48), 22 states have call predecessors, (48), 41 states have return successors, (235), 63 states have call predecessors, (235), 48 states have call successors, (235) [2022-11-20 11:40:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 586 transitions. [2022-11-20 11:40:13,523 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 586 transitions. Word has length 63 [2022-11-20 11:40:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:13,524 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 586 transitions. [2022-11-20 11:40:13,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 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) [2022-11-20 11:40:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 586 transitions. [2022-11-20 11:40:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:40:13,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:13,526 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-20 11:40:13,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-20 11:40:13,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (75)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:13,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 [2022-11-20 11:40:13,947 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting nondet_treeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:40:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1299678951, now seen corresponding path program 6 times [2022-11-20 11:40:13,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:40:13,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921618090] [2022-11-20 11:40:13,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:40:13,948 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 [2022-11-20 11:40:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:40:13,949 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:40:13,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (78)] Waiting until timeout for monitored process [2022-11-20 11:40:14,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 11:40:14,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:40:14,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:14,799 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 [2022-11-20 11:40:14,881 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8769 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8769))) is different from true [2022-11-20 11:40:14,911 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8770 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8770) |c_#valid|)) is different from true [2022-11-20 11:40:14,956 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 [2022-11-20 11:40:14,988 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8769 (_ BitVec 1)) (v_nondet_tree_~n~0.base_719 (_ BitVec 32))) (= |c_#valid| (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_8769) v_nondet_tree_~n~0.base_719 (_ bv1 1)))) is different from true [2022-11-20 11:40:15,034 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8769 (_ BitVec 1)) (v_nondet_tree_~n~0.base_719 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |nondet_tree_#res.base| v_ArrVal_8769) v_nondet_tree_~n~0.base_719 (_ bv1 1))) (= (bvadd (select |c_#valid| |nondet_tree_#res.base|) (_ bv1 1)) (_ bv0 1)))) is different from true [2022-11-20 11:40:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:40:19,369 INFO L321 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2022-11-20 11:40:19,370 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 25 treesize of output 52 [2022-11-20 11:40:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 48 trivial. 59 not checked. [2022-11-20 11:40:19,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:19,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:40:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921618090] [2022-11-20 11:40:19,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921618090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:19,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1388725288] [2022-11-20 11:40:19,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:40:19,917 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:40:19,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:40:19,918 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:40:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-20 11:40:20,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 11:40:20,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291852080] [2022-11-20 11:40:20,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:40:20,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:20,928 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:20,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-20 11:40:20,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 1 [2022-11-20 11:40:26,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 11:40:26,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:26,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:40:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:26,566 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9001 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9001))) is different from true [2022-11-20 11:40:26,580 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9002 (_ BitVec 1))) (= (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9002) |c_#valid|)) is different from true [2022-11-20 11:40:26,615 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9003 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9003))) is different from true [2022-11-20 11:40:32,520 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9001 (_ BitVec 1)) (v_nondet_tree_~n~0.base_739 (_ BitVec 32)) (v_ArrVal_9002 (_ BitVec 1)) (v_nondet_tree_~n~0.base_738 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9001) v_nondet_tree_~n~0.base_739 v_ArrVal_9002) v_nondet_tree_~n~0.base_738 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (select .cse0 v_nondet_tree_~n~0.base_739) (_ bv1 1)))))) is different from true [2022-11-20 11:40:34,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:40:35,009 INFO L321 Elim1Store]: treesize reduction 82, result has 28.7 percent of original size [2022-11-20 11:40:35,009 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 3 case distinctions, treesize of input 34 treesize of output 59 [2022-11-20 11:40:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 40 proven. 35 refuted. 1 times theorem prover too weak. 34 trivial. 27 not checked. [2022-11-20 11:40:35,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:35,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291852080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:35,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:40:35,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2022-11-20 11:40:35,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146424219] [2022-11-20 11:40:35,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:40:35,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:40:35,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:40:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:40:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=150, Unknown=16, NotChecked=306, Total=552 [2022-11-20 11:40:35,543 INFO L87 Difference]: Start difference. First operand 355 states and 586 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 11 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-20 11:40:41,839 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9003 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9003))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|)) (exists ((v_ArrVal_9001 (_ BitVec 1)) (v_nondet_tree_~n~0.base_739 (_ BitVec 32)) (v_ArrVal_9002 (_ BitVec 1)) (v_nondet_tree_~n~0.base_738 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9001) v_nondet_tree_~n~0.base_739 v_ArrVal_9002) v_nondet_tree_~n~0.base_738 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (select .cse0 v_nondet_tree_~n~0.base_739) (_ bv1 1))))))) is different from true [2022-11-20 11:40:42,064 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_8769 (_ BitVec 1)) (v_nondet_tree_~n~0.base_719 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32))) (and (= |c_#valid| (store (store |c_old(#valid)| |nondet_tree_#res.base| v_ArrVal_8769) v_nondet_tree_~n~0.base_719 (_ bv1 1))) (= (bvadd (select |c_#valid| |nondet_tree_#res.base|) (_ bv1 1)) (_ bv0 1)))) (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_8770 (_ BitVec 1)) (v_ArrVal_9002 (_ BitVec 1)) (v_nondet_tree_~n~0.base_738 (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select |c_#valid| v_nondet_tree_~n~0.base_738) (_ bv1 1))) (= |c_#valid| (store (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9002) v_nondet_tree_~n~0.base_738 v_ArrVal_8770)))) (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1))))) is different from true [2022-11-20 11:40:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:47,714 INFO L93 Difference]: Finished difference Result 366 states and 625 transitions. [2022-11-20 11:40:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:40:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 11 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 59 [2022-11-20 11:40:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:47,716 INFO L225 Difference]: With dead ends: 366 [2022-11-20 11:40:47,716 INFO L226 Difference]: Without dead ends: 366 [2022-11-20 11:40:47,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=131, Invalid=235, Unknown=20, NotChecked=484, Total=870 [2022-11-20 11:40:47,717 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:47,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 92 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 1105 Unchecked, 0.2s Time] [2022-11-20 11:40:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-20 11:40:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 358. [2022-11-20 11:40:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 252 states have (on average 1.2103174603174602) internal successors, (305), 272 states have internal predecessors, (305), 48 states have call successors, (48), 22 states have call predecessors, (48), 42 states have return successors, (258), 63 states have call predecessors, (258), 48 states have call successors, (258) [2022-11-20 11:40:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 611 transitions. [2022-11-20 11:40:47,735 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 611 transitions. Word has length 59 [2022-11-20 11:40:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:47,735 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 611 transitions. [2022-11-20 11:40:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 11 states have call successors, (16), 2 states have call predecessors, (16), 8 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-20 11:40:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 611 transitions. [2022-11-20 11:40:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 11:40:47,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:47,738 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1] [2022-11-20 11:40:47,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (78)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:47,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:48,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:48,153 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:40:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash 759231258, now seen corresponding path program 7 times [2022-11-20 11:40:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:40:48,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716253015] [2022-11-20 11:40:48,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:40:48,154 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 [2022-11-20 11:40:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:40:48,155 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:40:48,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (81)] Waiting until timeout for monitored process [2022-11-20 11:40:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:48,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:40:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:48,965 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 [2022-11-20 11:40:48,997 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9171 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9171) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:40:49,021 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9172 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9172))) is different from true [2022-11-20 11:40:49,064 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 [2022-11-20 11:40:49,112 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_759 (_ BitVec 32)) (v_ArrVal_9172 (_ BitVec 1))) (= (store (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9172) v_nondet_tree_~n~0.base_759 (_ bv1 1)) |c_#valid|)) is different from true [2022-11-20 11:40:53,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:40:53,522 INFO L321 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2022-11-20 11:40:53,522 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 25 treesize of output 52 [2022-11-20 11:40:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 17 refuted. 3 times theorem prover too weak. 51 trivial. 46 not checked. [2022-11-20 11:40:53,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:40:55,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:40:55,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716253015] [2022-11-20 11:40:55,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716253015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:55,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888679603] [2022-11-20 11:40:55,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:40:55,826 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 11:40:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 [2022-11-20 11:40:55,827 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 11:40:55,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-20 11:40:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:40:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:40:57,264 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 7 [2022-11-20 11:40:57,284 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9335 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9335))) is different from true [2022-11-20 11:40:57,307 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9336 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9336) |c_#valid|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:40:57,347 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_9336 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9336) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:41:01,982 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_780 (_ BitVec 32)) (v_nondet_tree_~n~0.base_781 (_ BitVec 32)) (v_ArrVal_9335 (_ BitVec 1)) (v_ArrVal_9336 (_ BitVec 1))) (let ((.cse0 (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9335))) (and (= (select .cse0 v_nondet_tree_~n~0.base_780) (_ bv0 1)) (= |c_#valid| (store (store .cse0 v_nondet_tree_~n~0.base_780 v_ArrVal_9336) v_nondet_tree_~n~0.base_781 (_ bv1 1)))))) is different from true [2022-11-20 11:41:12,141 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_780 (_ BitVec 32)) (v_nondet_tree_~n~0.base_781 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_9335 (_ BitVec 1)) (v_ArrVal_9336 (_ BitVec 1))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9335))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_780 v_ArrVal_9336) v_nondet_tree_~n~0.base_781 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_780)))))) is different from true [2022-11-20 11:41:12,333 INFO L321 Elim1Store]: treesize reduction 94, result has 31.4 percent of original size [2022-11-20 11:41:12,333 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 76 treesize of output 109 [2022-11-20 11:41:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 107 proven. 8 refuted. 0 times theorem prover too weak. 51 trivial. 58 not checked. [2022-11-20 11:41:12,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:41:12,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [888679603] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:41:12,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:41:12,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2022-11-20 11:41:12,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733636207] [2022-11-20 11:41:12,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:41:12,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:41:12,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:41:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:41:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=63, Unknown=21, NotChecked=216, Total=342 [2022-11-20 11:41:12,787 INFO L87 Difference]: Start difference. First operand 358 states and 611 transitions. Second operand has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 10 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-20 11:41:21,049 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_9172 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| c_nondet_tree_~n~0.base v_ArrVal_9172))) (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_9336 (_ BitVec 1))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9336) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-20 11:42:10,799 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_nondet_tree_~n~0.base_759 (_ BitVec 32)) (v_nondet_tree_~n~0.base_760 (_ BitVec 32)) (v_ArrVal_9171 (_ BitVec 1)) (v_ArrVal_9172 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (bvadd (select |c_#valid| nondet_tree_~n~0.base) (_ bv1 1)) (_ bv0 1)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_760) (_ bv0 1)) (= |c_#valid| (store (store (store |c_old(#valid)| v_nondet_tree_~n~0.base_760 v_ArrVal_9171) nondet_tree_~n~0.base v_ArrVal_9172) v_nondet_tree_~n~0.base_759 (_ bv1 1))))) (exists ((v_nondet_tree_~n~0.base_780 (_ BitVec 32)) (v_nondet_tree_~n~0.base_781 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_9335 (_ BitVec 1)) (v_ArrVal_9336 (_ BitVec 1))) (let ((.cse1 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_9335))) (let ((.cse0 (store (store .cse1 v_nondet_tree_~n~0.base_780 v_ArrVal_9336) v_nondet_tree_~n~0.base_781 (_ bv1 1)))) (and (= |c_#valid| .cse0) (= (_ bv0 1) (bvadd (select .cse0 nondet_tree_~n~0.base) (_ bv1 1))) (= (_ bv0 1) (select .cse1 v_nondet_tree_~n~0.base_780))))))) is different from true [2022-11-20 11:42:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:42:10,806 INFO L93 Difference]: Finished difference Result 364 states and 622 transitions. [2022-11-20 11:42:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:42:10,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 10 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 73 [2022-11-20 11:42:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:42:10,809 INFO L225 Difference]: With dead ends: 364 [2022-11-20 11:42:10,810 INFO L226 Difference]: Without dead ends: 364 [2022-11-20 11:42:10,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.7s TimeCoverageRelationStatistics Valid=70, Invalid=111, Unknown=45, NotChecked=374, Total=600 [2022-11-20 11:42:10,811 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1014 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:42:10,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 85 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 1014 Unchecked, 0.2s Time] [2022-11-20 11:42:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-20 11:42:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2022-11-20 11:42:10,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 253 states have (on average 1.2134387351778657) internal successors, (307), 272 states have internal predecessors, (307), 48 states have call successors, (48), 22 states have call predecessors, (48), 42 states have return successors, (258), 64 states have call predecessors, (258), 48 states have call successors, (258) [2022-11-20 11:42:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 613 transitions. [2022-11-20 11:42:10,832 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 613 transitions. Word has length 73 [2022-11-20 11:42:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:42:10,832 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 613 transitions. [2022-11-20 11:42:10,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 10 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-20 11:42:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 613 transitions. [2022-11-20 11:42:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-20 11:42:10,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:42:10,835 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 9, 8, 7, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1] [2022-11-20 11:42:10,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (81)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:11,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-20 11:42:11,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/cvc4 --incremental --print-success --lang smt [2022-11-20 11:42:11,250 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [maxErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, maxErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-20 11:42:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:42:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2142463032, now seen corresponding path program 9 times [2022-11-20 11:42:11,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:42:11,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519216272] [2022-11-20 11:42:11,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:42:11,251 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 [2022-11-20 11:42:11,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:42:11,252 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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) [2022-11-20 11:42:11,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73a4cafa-5cef-4894-9e07-6780cada0b1e/bin/uautomizer-ug76WZFUDN/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 (83)] Waiting until timeout for monitored process [2022-11-20 11:42:12,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 11:42:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:42:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 11:42:12,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:42:12,519 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 [2022-11-20 11:42:12,861 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_9572 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_9572) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:42:12,902 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_9572 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_9572) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-20 11:42:15,077 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9571 (_ BitVec 1)) (|nondet_tree_#res.base| (_ BitVec 32)) (v_ArrVal_9572 (_ BitVec 32)) (v_nondet_tree_~n~0.base_801 (_ BitVec 32)) (v_ArrVal_9570 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |nondet_tree_#res.base|)) (= (_ bv0 1) (select (store |c_old(#valid)| |nondet_tree_#res.base| v_ArrVal_9571) v_nondet_tree_~n~0.base_801)) (= (store (store |c_old(#length)| |nondet_tree_#res.base| v_ArrVal_9570) v_nondet_tree_~n~0.base_801 v_ArrVal_9572) |c_#length|))) is different from true