./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/verifythis/tree_del_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4e7fbc69 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS --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 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- 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-4e7fbc6 [2022-11-23 02:32:51,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:32:51,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:32:51,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:32:51,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:32:51,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:32:51,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:32:51,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:32:51,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:32:51,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:32:51,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:32:51,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:32:51,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:32:51,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:32:51,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:32:51,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:32:51,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:32:51,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:32:51,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:32:51,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:32:51,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:32:51,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:32:51,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:32:51,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:32:51,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:32:51,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:32:51,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:32:51,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:32:51,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:32:51,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:32:51,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:32:51,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:32:51,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:32:51,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:32:51,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:32:51,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:32:51,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:32:51,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:32:51,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:32:51,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:32:51,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:32:51,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-11-23 02:32:51,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:32:51,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:32:51,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:32:51,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:32:51,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:32:51,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:32:51,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:32:51,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:32:51,504 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:32:51,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:32:51,506 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:32:51,506 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:32:51,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:32:51,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:32:51,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:32:51,507 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:32:51,507 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:32:51,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:32:51,507 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:32:51,508 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:32:51,508 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:32:51,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:32:51,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:32:51,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:32:51,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:32:51,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:32:51,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:32:51,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:32:51,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:32:51,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:32:51,510 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:32:51,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:32:51,511 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-23 02:32:51,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:32:51,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:32:51,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:32:51,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:32:51,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:32:51,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-23 02:32:54,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:32:55,237 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:32:55,237 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-23 02:32:55,244 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data/6aab4e6e5/2edd72e32a1b44f2bfb2e19039eea236/FLAG3a79e936f [2022-11-23 02:32:55,268 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data/6aab4e6e5/2edd72e32a1b44f2bfb2e19039eea236 [2022-11-23 02:32:55,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:32:55,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:32:55,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:32:55,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:32:55,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:32:55,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:55" (1/1) ... [2022-11-23 02:32:55,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5387befb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:55, skipping insertion in model container [2022-11-23 02:32:55,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:55" (1/1) ... [2022-11-23 02:32:55,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:32:55,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:32:55,500 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-23 02:32:55,515 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:32:55,518 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:32:55,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:32:55,545 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) [2022-11-23 02:32:55,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@221589f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:55, skipping insertion in model container [2022-11-23 02:32:55,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:32:55,546 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 02:32:55,548 INFO L158 Benchmark]: Toolchain (without parser) took 274.19ms. Allocated memory is still 190.8MB. Free memory was 158.1MB in the beginning and 147.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 02:32:55,548 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 132.1MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 02:32:55,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.74ms. Allocated memory is still 190.8MB. Free memory was 157.3MB in the beginning and 147.9MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 02:32:55,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 132.1MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.74ms. Allocated memory is still 190.8MB. Free memory was 157.3MB in the beginning and 147.9MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/tree_del_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS --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 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 --- 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-4e7fbc6 [2022-11-23 02:32:57,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:32:57,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:32:57,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:32:57,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:32:57,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:32:57,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:32:57,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:32:57,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:32:58,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:32:58,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:32:58,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:32:58,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:32:58,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:32:58,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:32:58,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:32:58,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:32:58,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:32:58,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:32:58,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:32:58,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:32:58,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:32:58,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:32:58,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:32:58,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:32:58,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:32:58,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:32:58,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:32:58,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:32:58,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:32:58,049 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:32:58,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:32:58,052 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:32:58,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:32:58,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:32:58,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:32:58,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:32:58,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:32:58,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:32:58,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:32:58,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:32:58,070 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-11-23 02:32:58,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:32:58,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:32:58,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:32:58,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:32:58,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:32:58,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:32:58,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:32:58,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:32:58,120 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:32:58,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:32:58,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:32:58,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:32:58,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:32:58,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:32:58,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:32:58,124 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:32:58,124 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:32:58,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:32:58,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:32:58,125 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 02:32:58,125 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 02:32:58,125 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:32:58,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:32:58,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:32:58,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:32:58,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:32:58,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:32:58,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:32:58,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:32:58,128 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 02:32:58,128 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 02:32:58,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:32:58,129 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:32:58,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:32:58,130 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 02:32:58,130 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 448d6e9f7f0c094a8335d652a2766ae983308e33ec1a543ceaed97ae79744722 [2022-11-23 02:32:58,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:32:58,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:32:58,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:32:58,552 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:32:58,552 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:32:58,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-23 02:33:01,854 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:33:02,099 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:33:02,100 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/sv-benchmarks/c/verifythis/tree_del_rec.c [2022-11-23 02:33:02,107 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data/284729030/50000691ceb04c1c9104a34421eb40ed/FLAG531f13e09 [2022-11-23 02:33:02,127 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/data/284729030/50000691ceb04c1c9104a34421eb40ed [2022-11-23 02:33:02,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:33:02,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:33:02,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:02,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:33:02,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:33:02,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4359498c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02, skipping insertion in model container [2022-11-23 02:33:02,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:33:02,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:33:02,378 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-23 02:33:02,403 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:33:02,410 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:33:02,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:02,466 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 02:33:02,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:33:02,489 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-23 02:33:02,502 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:33:02,505 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:33:02,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:02,534 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:33:02,551 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_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/sv-benchmarks/c/verifythis/tree_del_rec.c[585,598] [2022-11-23 02:33:02,564 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:33:02,566 WARN L1569 CHandler]: Possible shadowing of function min [2022-11-23 02:33:02,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:33:02,611 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:33:02,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02 WrapperNode [2022-11-23 02:33:02,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:33:02,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:33:02,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:33:02,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:33:02,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,717 INFO L138 Inliner]: procedures = 31, calls = 61, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-11-23 02:33:02,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:33:02,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:33:02,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:33:02,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:33:02,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,774 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:33:02,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:33:02,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:33:02,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:33:02,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (1/1) ... [2022-11-23 02:33:02,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:33:02,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:33:02,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:33:02,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:33:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:33:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 02:33:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:33:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 02:33:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure tree_del [2022-11-23 02:33:02,857 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_del [2022-11-23 02:33:02,857 INFO L130 BoogieDeclarations]: Found specification of procedure min [2022-11-23 02:33:02,857 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2022-11-23 02:33:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 02:33:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 02:33:02,858 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 02:33:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 02:33:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-11-23 02:33:02,858 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-11-23 02:33:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:33:02,858 INFO L130 BoogieDeclarations]: Found specification of procedure size [2022-11-23 02:33:02,859 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2022-11-23 02:33:02,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:33:02,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:33:02,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 02:33:02,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 02:33:02,859 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2022-11-23 02:33:02,859 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2022-11-23 02:33:02,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:33:02,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 02:33:02,971 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:33:02,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:33:03,816 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:33:03,824 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:33:03,824 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 02:33:03,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:03 BoogieIcfgContainer [2022-11-23 02:33:03,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:33:03,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:33:03,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:33:03,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:33:03,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:33:02" (1/3) ... [2022-11-23 02:33:03,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f14d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:03, skipping insertion in model container [2022-11-23 02:33:03,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:02" (2/3) ... [2022-11-23 02:33:03,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f14d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:03, skipping insertion in model container [2022-11-23 02:33:03,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:03" (3/3) ... [2022-11-23 02:33:03,834 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_del_rec.c [2022-11-23 02:33:03,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:33:03,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2022-11-23 02:33:03,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:33:03,940 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=PETRI_NET, 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;@f18a180, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:33:03,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2022-11-23 02:33:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 174 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 144 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 02:33:03,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:03,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:33:03,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:03,967 INFO L85 PathProgramCache]: Analyzing trace with hash 120433579, now seen corresponding path program 1 times [2022-11-23 02:33:03,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:03,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385576287] [2022-11-23 02:33:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:03,982 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 [2022-11-23 02:33:03,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:04,027 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:04,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:33:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:04,205 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 [2022-11-23 02:33:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:04,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:04,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:04,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385576287] [2022-11-23 02:33:04,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385576287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:04,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:04,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:33:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729405616] [2022-11-23 02:33:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:04,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:33:04,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:33:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:33:04,277 INFO L87 Difference]: Start difference. First operand has 174 states, 89 states have (on average 1.7640449438202248) internal successors, (157), 144 states have internal predecessors, (157), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) 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) [2022-11-23 02:33:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:04,626 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2022-11-23 02:33:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:33:04,629 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 [2022-11-23 02:33:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:04,644 INFO L225 Difference]: With dead ends: 175 [2022-11-23 02:33:04,645 INFO L226 Difference]: Without dead ends: 172 [2022-11-23 02:33:04,652 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 [2022-11-23 02:33:04,656 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:04,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 326 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:33:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-23 02:33:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2022-11-23 02:33:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 87 states have (on average 1.7011494252873562) internal successors, (148), 140 states have internal predecessors, (148), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2022-11-23 02:33:04,744 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 5 [2022-11-23 02:33:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:04,744 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2022-11-23 02:33:04,744 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) [2022-11-23 02:33:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2022-11-23 02:33:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 02:33:04,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:04,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:33:04,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:04,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:04,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash 120433580, now seen corresponding path program 1 times [2022-11-23 02:33:04,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:04,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085222808] [2022-11-23 02:33:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:04,961 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 [2022-11-23 02:33:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:04,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:04,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:33:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:05,032 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 [2022-11-23 02:33:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:05,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:05,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:05,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085222808] [2022-11-23 02:33:05,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085222808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:05,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:05,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:33:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242268455] [2022-11-23 02:33:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:05,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:33:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:33:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:33:05,050 INFO L87 Difference]: Start difference. First operand 170 states and 192 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) [2022-11-23 02:33:05,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:05,320 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2022-11-23 02:33:05,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:33:05,321 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 [2022-11-23 02:33:05,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:05,323 INFO L225 Difference]: With dead ends: 169 [2022-11-23 02:33:05,323 INFO L226 Difference]: Without dead ends: 169 [2022-11-23 02:33:05,323 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 [2022-11-23 02:33:05,324 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 327 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:33:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-23 02:33:05,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-23 02:33:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.6896551724137931) internal successors, (147), 139 states have internal predecessors, (147), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 02:33:05,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-11-23 02:33:05,336 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 5 [2022-11-23 02:33:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:05,336 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-11-23 02:33:05,336 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) [2022-11-23 02:33:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-11-23 02:33:05,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 02:33:05,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:05,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:05,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:05,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:05,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:05,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash 854953177, now seen corresponding path program 1 times [2022-11-23 02:33:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:05,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146826172] [2022-11-23 02:33:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:05,553 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 [2022-11-23 02:33:05,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:05,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:05,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:33:05,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:05,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:05,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:05,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146826172] [2022-11-23 02:33:05,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146826172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:05,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:05,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:33:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309759341] [2022-11-23 02:33:05,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:33:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:33:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:33:05,773 INFO L87 Difference]: Start difference. First operand 169 states and 191 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) [2022-11-23 02:33:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:05,982 INFO L93 Difference]: Finished difference Result 233 states and 270 transitions. [2022-11-23 02:33:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:33:05,983 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 [2022-11-23 02:33:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:05,985 INFO L225 Difference]: With dead ends: 233 [2022-11-23 02:33:05,985 INFO L226 Difference]: Without dead ends: 233 [2022-11-23 02:33:05,985 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 [2022-11-23 02:33:05,986 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 91 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:05,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1124 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:33:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-23 02:33:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 177. [2022-11-23 02:33:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 92 states have (on average 1.6521739130434783) internal successors, (152), 145 states have internal predecessors, (152), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 23 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-23 02:33:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-11-23 02:33:05,999 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 11 [2022-11-23 02:33:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:06,000 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-11-23 02:33:06,000 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) [2022-11-23 02:33:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-11-23 02:33:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 02:33:06,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:06,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:06,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:06,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:06,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash 873486780, now seen corresponding path program 1 times [2022-11-23 02:33:06,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:06,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11315713] [2022-11-23 02:33:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:06,219 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 [2022-11-23 02:33:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:06,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:06,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:33:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:06,327 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 [2022-11-23 02:33:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:06,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:06,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:06,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11315713] [2022-11-23 02:33:06,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11315713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:06,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:06,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:33:06,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124248212] [2022-11-23 02:33:06,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:06,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:33:06,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:33:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:33:06,367 INFO L87 Difference]: Start difference. First operand 177 states and 201 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) [2022-11-23 02:33:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:06,947 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-23 02:33:06,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:33:06,947 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 [2022-11-23 02:33:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:06,949 INFO L225 Difference]: With dead ends: 181 [2022-11-23 02:33:06,949 INFO L226 Difference]: Without dead ends: 181 [2022-11-23 02:33:06,949 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 [2022-11-23 02:33:06,950 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 95 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:06,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 202 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 02:33:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-23 02:33:06,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2022-11-23 02:33:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 94 states have (on average 1.6595744680851063) internal successors, (156), 145 states have internal predecessors, (156), 23 states have call successors, (23), 8 states have call predecessors, (23), 9 states have return successors, (26), 25 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-23 02:33:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2022-11-23 02:33:06,960 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 11 [2022-11-23 02:33:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:06,960 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2022-11-23 02:33:06,960 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) [2022-11-23 02:33:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2022-11-23 02:33:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 02:33:06,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:06,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:06,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:07,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:07,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:07,174 INFO L85 PathProgramCache]: Analyzing trace with hash 873486781, now seen corresponding path program 1 times [2022-11-23 02:33:07,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:07,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222111435] [2022-11-23 02:33:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:07,175 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 [2022-11-23 02:33:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:07,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:07,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:07,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:33:07,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:07,277 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 [2022-11-23 02:33:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:07,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:07,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:07,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222111435] [2022-11-23 02:33:07,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222111435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:07,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:07,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:33:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402110296] [2022-11-23 02:33:07,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:07,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:33:07,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:33:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:33:07,332 INFO L87 Difference]: Start difference. First operand 179 states and 205 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) [2022-11-23 02:33:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:07,987 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2022-11-23 02:33:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:33:07,988 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 [2022-11-23 02:33:07,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:07,989 INFO L225 Difference]: With dead ends: 185 [2022-11-23 02:33:07,990 INFO L226 Difference]: Without dead ends: 185 [2022-11-23 02:33:07,990 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 [2022-11-23 02:33:07,991 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 100 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:07,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 177 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 02:33:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-23 02:33:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-23 02:33:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 96 states have (on average 1.6354166666666667) internal successors, (157), 147 states have internal predecessors, (157), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (28), 26 states have call predecessors, (28), 24 states have call successors, (28) [2022-11-23 02:33:08,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 209 transitions. [2022-11-23 02:33:08,001 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 209 transitions. Word has length 11 [2022-11-23 02:33:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:08,002 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 209 transitions. [2022-11-23 02:33:08,002 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) [2022-11-23 02:33:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 209 transitions. [2022-11-23 02:33:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 02:33:08,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:08,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:08,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:08,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:08,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1280810199, now seen corresponding path program 1 times [2022-11-23 02:33:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:08,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701912200] [2022-11-23 02:33:08,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:08,218 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 [2022-11-23 02:33:08,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:08,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:08,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:33:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:08,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:08,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:08,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701912200] [2022-11-23 02:33:08,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701912200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:08,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:08,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 02:33:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804370181] [2022-11-23 02:33:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:33:08,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:33:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:33:08,402 INFO L87 Difference]: Start difference. First operand 182 states and 209 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) [2022-11-23 02:33:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:08,603 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2022-11-23 02:33:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:33:08,607 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 [2022-11-23 02:33:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:08,609 INFO L225 Difference]: With dead ends: 242 [2022-11-23 02:33:08,609 INFO L226 Difference]: Without dead ends: 242 [2022-11-23 02:33:08,609 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 [2022-11-23 02:33:08,610 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 90 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:08,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1123 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:33:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-23 02:33:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 204. [2022-11-23 02:33:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 110 states have (on average 1.5909090909090908) internal successors, (175), 161 states have internal predecessors, (175), 31 states have call successors, (31), 9 states have call predecessors, (31), 10 states have return successors, (35), 33 states have call predecessors, (35), 31 states have call successors, (35) [2022-11-23 02:33:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 241 transitions. [2022-11-23 02:33:08,628 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 241 transitions. Word has length 17 [2022-11-23 02:33:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:08,628 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 241 transitions. [2022-11-23 02:33:08,628 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) [2022-11-23 02:33:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 241 transitions. [2022-11-23 02:33:08,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 02:33:08,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:08,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:08,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:08,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1539264760, now seen corresponding path program 1 times [2022-11-23 02:33:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:08,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893252863] [2022-11-23 02:33:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:08,844 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 [2022-11-23 02:33:08,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:08,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:08,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:33:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:09,067 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 [2022-11-23 02:33:09,107 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_109 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109))))) is different from true [2022-11-23 02:33:09,146 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_109 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_109)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:09,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 02:33:09,281 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 [2022-11-23 02:33:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-23 02:33:09,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:09,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893252863] [2022-11-23 02:33:09,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893252863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885368955] [2022-11-23 02:33:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:09,495 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:33:09,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:33:09,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:33:09,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 02:33:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:09,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 02:33:09,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:09,824 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 [2022-11-23 02:33:09,851 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 [2022-11-23 02:33:09,919 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:33:09,920 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 [2022-11-23 02:33:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-23 02:33:09,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:10,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885368955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:10,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:10,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2022-11-23 02:33:10,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566138475] [2022-11-23 02:33:10,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:10,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:33:10,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:10,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:33:10,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=15, Unknown=3, NotChecked=24, Total=56 [2022-11-23 02:33:10,112 INFO L87 Difference]: Start difference. First operand 204 states and 241 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) [2022-11-23 02:33:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:12,763 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2022-11-23 02:33:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:33:12,763 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 [2022-11-23 02:33:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:12,765 INFO L225 Difference]: With dead ends: 211 [2022-11-23 02:33:12,765 INFO L226 Difference]: Without dead ends: 211 [2022-11-23 02:33:12,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=18, Invalid=20, Unknown=4, NotChecked=30, Total=72 [2022-11-23 02:33:12,766 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 100 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:12,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 201 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 269 Invalid, 0 Unknown, 596 Unchecked, 0.6s Time] [2022-11-23 02:33:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-23 02:33:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2022-11-23 02:33:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 113 states have (on average 1.584070796460177) internal successors, (179), 164 states have internal predecessors, (179), 31 states have call successors, (31), 9 states have call predecessors, (31), 11 states have return successors, (39), 34 states have call predecessors, (39), 31 states have call successors, (39) [2022-11-23 02:33:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 249 transitions. [2022-11-23 02:33:12,790 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 249 transitions. Word has length 29 [2022-11-23 02:33:12,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:12,791 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 249 transitions. [2022-11-23 02:33:12,791 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) [2022-11-23 02:33:12,791 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 249 transitions. [2022-11-23 02:33:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 02:33:12,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:12,805 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:12,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:13,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-23 02:33:13,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt [2022-11-23 02:33:13,206 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:13,207 INFO L85 PathProgramCache]: Analyzing trace with hash -417761545, now seen corresponding path program 1 times [2022-11-23 02:33:13,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:13,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863155376] [2022-11-23 02:33:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:13,208 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 [2022-11-23 02:33:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:13,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:13,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 02:33:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 02:33:13,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:13,461 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 [2022-11-23 02:33:13,467 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 [2022-11-23 02:33:13,528 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_250 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_250) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:13,573 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_250 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_250) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:33:13,661 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 [2022-11-23 02:33:13,675 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:33:13,675 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 [2022-11-23 02:33:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-23 02:33:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:14,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:14,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863155376] [2022-11-23 02:33:14,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863155376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:14,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [237978527] [2022-11-23 02:33:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:14,048 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:33:14,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:33:14,049 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:33:14,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-23 02:33:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 02:33:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:14,449 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 [2022-11-23 02:33:14,455 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 [2022-11-23 02:33:14,503 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_325 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_325) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:14,541 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_325 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_325) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:33:14,624 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 [2022-11-23 02:33:14,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:33:14,638 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 [2022-11-23 02:33:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 8 not checked. [2022-11-23 02:33:14,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:14,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [237978527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:14,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:14,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-23 02:33:14,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194040695] [2022-11-23 02:33:14,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:14,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:33:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:33:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=42, Unknown=4, NotChecked=60, Total=132 [2022-11-23 02:33:14,856 INFO L87 Difference]: Start difference. First operand 208 states and 249 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 02:33:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:15,701 INFO L93 Difference]: Finished difference Result 215 states and 262 transitions. [2022-11-23 02:33:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:33:15,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 35 [2022-11-23 02:33:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:15,704 INFO L225 Difference]: With dead ends: 215 [2022-11-23 02:33:15,704 INFO L226 Difference]: Without dead ends: 215 [2022-11-23 02:33:15,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=52, Unknown=4, NotChecked=68, Total=156 [2022-11-23 02:33:15,705 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 198 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 834 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:15,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 177 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 310 Invalid, 0 Unknown, 834 Unchecked, 0.7s Time] [2022-11-23 02:33:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-23 02:33:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2022-11-23 02:33:15,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 115 states have (on average 1.565217391304348) internal successors, (180), 166 states have internal predecessors, (180), 32 states have call successors, (32), 9 states have call predecessors, (32), 11 states have return successors, (42), 35 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-23 02:33:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 254 transitions. [2022-11-23 02:33:15,715 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 254 transitions. Word has length 35 [2022-11-23 02:33:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:15,715 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 254 transitions. [2022-11-23 02:33:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 02:33:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 254 transitions. [2022-11-23 02:33:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 02:33:15,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:15,717 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] [2022-11-23 02:33:15,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:15,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:16,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:16,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:16,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050227, now seen corresponding path program 1 times [2022-11-23 02:33:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:16,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058440856] [2022-11-23 02:33:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:16,123 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 [2022-11-23 02:33:16,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:16,124 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:16,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 02:33:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:33:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:16,255 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 [2022-11-23 02:33:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:33:16,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:33:16,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:16,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058440856] [2022-11-23 02:33:16,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058440856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:33:16,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:16,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-23 02:33:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972613661] [2022-11-23 02:33:16,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:16,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:33:16,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:33:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:33:16,587 INFO L87 Difference]: Start difference. First operand 211 states and 254 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) [2022-11-23 02:33:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:18,386 INFO L93 Difference]: Finished difference Result 228 states and 276 transitions. [2022-11-23 02:33:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:33:18,387 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 [2022-11-23 02:33:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:18,389 INFO L225 Difference]: With dead ends: 228 [2022-11-23 02:33:18,389 INFO L226 Difference]: Without dead ends: 228 [2022-11-23 02:33:18,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:33:18,390 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 265 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:18,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 559 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 02:33:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-23 02:33:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2022-11-23 02:33:18,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 125 states have (on average 1.528) internal successors, (191), 173 states have internal predecessors, (191), 34 states have call successors, (34), 10 states have call predecessors, (34), 12 states have return successors, (44), 36 states have call predecessors, (44), 34 states have call successors, (44) [2022-11-23 02:33:18,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 269 transitions. [2022-11-23 02:33:18,399 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 269 transitions. Word has length 25 [2022-11-23 02:33:18,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:18,399 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 269 transitions. [2022-11-23 02:33:18,399 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) [2022-11-23 02:33:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 269 transitions. [2022-11-23 02:33:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 02:33:18,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:18,400 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] [2022-11-23 02:33:18,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:18,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:18,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:18,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1668050226, now seen corresponding path program 1 times [2022-11-23 02:33:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:18,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395200455] [2022-11-23 02:33:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:18,613 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 [2022-11-23 02:33:18,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:18,615 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:18,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:33:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:18,744 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 [2022-11-23 02:33:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:33:18,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:33:20,084 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395200455] [2022-11-23 02:33:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395200455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:33:20,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:20,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-23 02:33:20,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878428936] [2022-11-23 02:33:20,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:33:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:33:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:33:20,086 INFO L87 Difference]: Start difference. First operand 220 states and 269 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) [2022-11-23 02:33:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:25,601 INFO L93 Difference]: Finished difference Result 245 states and 305 transitions. [2022-11-23 02:33:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 02:33:25,603 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 [2022-11-23 02:33:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:25,605 INFO L225 Difference]: With dead ends: 245 [2022-11-23 02:33:25,605 INFO L226 Difference]: Without dead ends: 245 [2022-11-23 02:33:25,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-23 02:33:25,606 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 259 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:25,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 597 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 02:33:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-23 02:33:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 236. [2022-11-23 02:33:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.5036496350364963) internal successors, (206), 185 states have internal predecessors, (206), 37 states have call successors, (37), 11 states have call predecessors, (37), 13 states have return successors, (47), 39 states have call predecessors, (47), 37 states have call successors, (47) [2022-11-23 02:33:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 290 transitions. [2022-11-23 02:33:25,617 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 290 transitions. Word has length 25 [2022-11-23 02:33:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:25,618 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 290 transitions. [2022-11-23 02:33:25,618 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) [2022-11-23 02:33:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 290 transitions. [2022-11-23 02:33:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 02:33:25,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:25,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:33:25,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:25,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting tree_inorderErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 369889479, now seen corresponding path program 1 times [2022-11-23 02:33:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:25,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350312686] [2022-11-23 02:33:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:25,833 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 [2022-11-23 02:33:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:25,834 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:25,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:33:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:33:25,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:25,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350312686] [2022-11-23 02:33:25,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350312686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:25,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:25,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 02:33:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845025753] [2022-11-23 02:33:25,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:25,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:33:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:33:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:33:25,961 INFO L87 Difference]: Start difference. First operand 236 states and 290 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:33:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:26,000 INFO L93 Difference]: Finished difference Result 226 states and 271 transitions. [2022-11-23 02:33:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:33:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-23 02:33:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:26,002 INFO L225 Difference]: With dead ends: 226 [2022-11-23 02:33:26,003 INFO L226 Difference]: Without dead ends: 210 [2022-11-23 02:33:26,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:33:26,003 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 0 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:26,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 736 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:33:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-23 02:33:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-11-23 02:33:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 120 states have (on average 1.5416666666666667) internal successors, (185), 169 states have internal predecessors, (185), 29 states have call successors, (29), 9 states have call predecessors, (29), 12 states have return successors, (41), 31 states have call predecessors, (41), 29 states have call successors, (41) [2022-11-23 02:33:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 255 transitions. [2022-11-23 02:33:26,015 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 255 transitions. Word has length 30 [2022-11-23 02:33:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:26,015 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 255 transitions. [2022-11-23 02:33:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:33:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 255 transitions. [2022-11-23 02:33:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 02:33:26,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:26,017 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] [2022-11-23 02:33:26,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:26,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:26,228 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting sizeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash -648076771, now seen corresponding path program 1 times [2022-11-23 02:33:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:26,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644724878] [2022-11-23 02:33:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:26,229 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 [2022-11-23 02:33:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:26,230 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:26,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:26,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:33:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 02:33:26,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:33:26,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:26,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644724878] [2022-11-23 02:33:26,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644724878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:33:26,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:33:26,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 02:33:26,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207130696] [2022-11-23 02:33:26,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:33:26,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:33:26,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:26,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:33:26,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:33:26,420 INFO L87 Difference]: Start difference. First operand 210 states and 255 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) [2022-11-23 02:33:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:26,784 INFO L93 Difference]: Finished difference Result 216 states and 264 transitions. [2022-11-23 02:33:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:33:26,784 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 [2022-11-23 02:33:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:26,786 INFO L225 Difference]: With dead ends: 216 [2022-11-23 02:33:26,786 INFO L226 Difference]: Without dead ends: 212 [2022-11-23 02:33:26,786 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 [2022-11-23 02:33:26,787 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 107 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:26,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1017 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:33:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-23 02:33:26,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 210. [2022-11-23 02:33:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 120 states have (on average 1.525) internal successors, (183), 169 states have internal predecessors, (183), 29 states have call successors, (29), 9 states have call predecessors, (29), 12 states have return successors, (41), 31 states have call predecessors, (41), 29 states have call successors, (41) [2022-11-23 02:33:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 253 transitions. [2022-11-23 02:33:26,797 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 253 transitions. Word has length 31 [2022-11-23 02:33:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:26,798 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 253 transitions. [2022-11-23 02:33:26,798 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) [2022-11-23 02:33:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 253 transitions. [2022-11-23 02:33:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 02:33:26,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:26,799 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] [2022-11-23 02:33:26,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:27,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:27,011 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2088825952, now seen corresponding path program 1 times [2022-11-23 02:33:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:27,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064973510] [2022-11-23 02:33:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:27,012 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 [2022-11-23 02:33:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:27,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:27,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:27,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 02:33:27,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:27,199 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 [2022-11-23 02:33:27,207 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 [2022-11-23 02:33:27,282 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 [2022-11-23 02:33:27,291 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 [2022-11-23 02:33:27,549 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 [2022-11-23 02:33:27,555 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 [2022-11-23 02:33:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:33:27,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:33:28,771 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064973510] [2022-11-23 02:33:28,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064973510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:33:28,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:28,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2022-11-23 02:33:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932917458] [2022-11-23 02:33:28,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:33:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:33:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:33:28,772 INFO L87 Difference]: Start difference. First operand 210 states and 253 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:33:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:31,419 INFO L93 Difference]: Finished difference Result 240 states and 295 transitions. [2022-11-23 02:33:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:33:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-11-23 02:33:31,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:31,422 INFO L225 Difference]: With dead ends: 240 [2022-11-23 02:33:31,422 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 02:33:31,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:33:31,423 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 218 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:31,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1454 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 02:33:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 02:33:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 214. [2022-11-23 02:33:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 172 states have internal predecessors, (186), 29 states have call successors, (29), 10 states have call predecessors, (29), 13 states have return successors, (41), 31 states have call predecessors, (41), 29 states have call successors, (41) [2022-11-23 02:33:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2022-11-23 02:33:31,434 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 256 transitions. Word has length 31 [2022-11-23 02:33:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:31,434 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 256 transitions. [2022-11-23 02:33:31,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 02:33:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 256 transitions. [2022-11-23 02:33:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 02:33:31,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:31,436 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-23 02:33:31,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:31,648 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1545271268, now seen corresponding path program 1 times [2022-11-23 02:33:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:31,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965129893] [2022-11-23 02:33:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:31,650 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 [2022-11-23 02:33:31,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:31,652 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:31,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 02:33:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:32,013 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 [2022-11-23 02:33:32,019 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 [2022-11-23 02:33:32,122 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_582 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_582) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:32,164 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_582 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_582) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:32,189 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 [2022-11-23 02:33:32,247 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_39 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_582 (_ BitVec 32))) (and (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_39 v_ArrVal_582) nondet_tree_~n~0.base (_ bv12 32))) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_39) (_ bv0 1)))) is different from true [2022-11-23 02:33:32,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:33:32,331 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 02:33:32,331 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 [2022-11-23 02:33:32,347 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:33:32,347 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 [2022-11-23 02:33:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 40 not checked. [2022-11-23 02:33:32,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:33,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965129893] [2022-11-23 02:33:33,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965129893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:33,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [763180238] [2022-11-23 02:33:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:33:33,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:33:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:33:33,200 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:33:33,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-23 02:33:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:33:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 02:33:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:33,647 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 [2022-11-23 02:33:33,653 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 [2022-11-23 02:33:33,746 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_694 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_694) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:33,788 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_694 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_694) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:33,867 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_50 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_694 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_50) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_50 v_ArrVal_694) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-23 02:33:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:33:33,940 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 02:33:33,940 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 [2022-11-23 02:33:33,958 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:33:33,958 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 [2022-11-23 02:33:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 40 not checked. [2022-11-23 02:33:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:34,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [763180238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:34,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:34,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-23 02:33:34,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722324046] [2022-11-23 02:33:34,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:34,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:33:34,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:33:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=45, Unknown=7, NotChecked=126, Total=210 [2022-11-23 02:33:34,510 INFO L87 Difference]: Start difference. First operand 214 states and 256 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 02:33:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:43,095 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2022-11-23 02:33:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:33:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 55 [2022-11-23 02:33:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:43,098 INFO L225 Difference]: With dead ends: 227 [2022-11-23 02:33:43,098 INFO L226 Difference]: Without dead ends: 227 [2022-11-23 02:33:43,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=57, Invalid=92, Unknown=11, NotChecked=182, Total=342 [2022-11-23 02:33:43,099 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 194 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1464 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:43,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 176 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 318 Invalid, 0 Unknown, 1464 Unchecked, 0.8s Time] [2022-11-23 02:33:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-23 02:33:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-11-23 02:33:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 126 states have (on average 1.5) internal successors, (189), 175 states have internal predecessors, (189), 29 states have call successors, (29), 10 states have call predecessors, (29), 14 states have return successors, (46), 32 states have call predecessors, (46), 29 states have call successors, (46) [2022-11-23 02:33:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 264 transitions. [2022-11-23 02:33:43,116 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 264 transitions. Word has length 55 [2022-11-23 02:33:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:43,119 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 264 transitions. [2022-11-23 02:33:43,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 7 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 02:33:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 264 transitions. [2022-11-23 02:33:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 02:33:43,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:43,124 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1] [2022-11-23 02:33:43,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:43,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:43,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:43,529 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash 104860, now seen corresponding path program 2 times [2022-11-23 02:33:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:43,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81891037] [2022-11-23 02:33:43,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:33:43,531 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 [2022-11-23 02:33:43,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:43,532 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:43,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:43,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:33:43,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 02:33:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:43,902 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 [2022-11-23 02:33:43,909 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 [2022-11-23 02:33:44,022 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_806 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_806) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:44,055 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 [2022-11-23 02:33:44,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_61 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_806 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_61) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_61 v_ArrVal_806) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-23 02:33:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:33:44,241 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 02:33:44,242 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 [2022-11-23 02:33:44,262 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:33:44,263 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 [2022-11-23 02:33:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 40 not checked. [2022-11-23 02:33:44,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:46,360 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:33:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81891037] [2022-11-23 02:33:46,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81891037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:46,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999958291] [2022-11-23 02:33:46,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:33:46,361 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:33:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:33:46,362 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:33:46,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-23 02:33:46,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:33:46,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:46,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 02:33:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:46,819 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 [2022-11-23 02:33:46,825 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 [2022-11-23 02:33:46,919 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_918 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_918))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:33:46,999 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_72 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_918 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_72) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_72 v_ArrVal_918) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-23 02:33:47,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:33:47,112 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 02:33:47,113 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 [2022-11-23 02:33:47,133 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:33:47,133 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 [2022-11-23 02:33:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 40 not checked. [2022-11-23 02:33:47,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:33:49,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999958291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:33:49,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:33:49,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-23 02:33:49,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239960894] [2022-11-23 02:33:49,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:33:49,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 02:33:49,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:33:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 02:33:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=43, Unknown=5, NotChecked=80, Total=156 [2022-11-23 02:33:49,567 INFO L87 Difference]: Start difference. First operand 218 states and 264 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), 3 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 02:33:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:33:59,051 INFO L93 Difference]: Finished difference Result 234 states and 300 transitions. [2022-11-23 02:33:59,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:33:59,052 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), 3 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 55 [2022-11-23 02:33:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:33:59,053 INFO L225 Difference]: With dead ends: 234 [2022-11-23 02:33:59,053 INFO L226 Difference]: Without dead ends: 234 [2022-11-23 02:33:59,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=52, Invalid=89, Unknown=11, NotChecked=120, Total=272 [2022-11-23 02:33:59,055 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 183 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1087 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:33:59,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 220 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 483 Invalid, 0 Unknown, 1087 Unchecked, 1.2s Time] [2022-11-23 02:33:59,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-23 02:33:59,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2022-11-23 02:33:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.4736842105263157) internal successors, (196), 182 states have internal predecessors, (196), 31 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (61), 35 states have call predecessors, (61), 31 states have call successors, (61) [2022-11-23 02:33:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 288 transitions. [2022-11-23 02:33:59,066 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 288 transitions. Word has length 55 [2022-11-23 02:33:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:33:59,072 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 288 transitions. [2022-11-23 02:33:59,073 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), 3 states have call predecessors, (11), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 02:33:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 288 transitions. [2022-11-23 02:33:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 02:33:59,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:33:59,075 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] [2022-11-23 02:33:59,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-23 02:33:59,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:59,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:33:59,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:33:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:33:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1786565566, now seen corresponding path program 2 times [2022-11-23 02:33:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:33:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744766111] [2022-11-23 02:33:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:33:59,481 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 [2022-11-23 02:33:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:33:59,482 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:33:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:33:59,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:33:59,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:33:59,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:33:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:33:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 02:33:59,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:00,513 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 [2022-11-23 02:34:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 02:34:00,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:00,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744766111] [2022-11-23 02:34:00,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744766111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:34:00,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:34:00,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-23 02:34:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993267649] [2022-11-23 02:34:00,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:00,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:34:00,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:34:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:34:00,691 INFO L87 Difference]: Start difference. First operand 228 states and 288 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 02:34:03,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:03,824 INFO L93 Difference]: Finished difference Result 230 states and 291 transitions. [2022-11-23 02:34:03,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:34:03,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 39 [2022-11-23 02:34:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:03,826 INFO L225 Difference]: With dead ends: 230 [2022-11-23 02:34:03,826 INFO L226 Difference]: Without dead ends: 230 [2022-11-23 02:34:03,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:34:03,827 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 78 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:03,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1333 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 02:34:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-23 02:34:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2022-11-23 02:34:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.4511278195488722) internal successors, (193), 182 states have internal predecessors, (193), 31 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (61), 35 states have call predecessors, (61), 31 states have call successors, (61) [2022-11-23 02:34:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 285 transitions. [2022-11-23 02:34:03,851 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 285 transitions. Word has length 39 [2022-11-23 02:34:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:03,851 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 285 transitions. [2022-11-23 02:34:03,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 02:34:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 285 transitions. [2022-11-23 02:34:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 02:34:03,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:03,854 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-23 02:34:03,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:04,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:04,067 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting nondet_treeErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:34:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:04,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1703173775, now seen corresponding path program 2 times [2022-11-23 02:34:04,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:04,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622847982] [2022-11-23 02:34:04,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:34:04,068 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 [2022-11-23 02:34:04,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:04,069 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:04,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 02:34:04,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:34:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:04,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 02:34:04,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:04,456 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 [2022-11-23 02:34:04,464 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 [2022-11-23 02:34:04,526 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1105 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1105))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:34:04,569 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1105 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1105)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:34:04,599 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 [2022-11-23 02:34:04,703 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_93 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_93 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)))) is different from true [2022-11-23 02:34:04,734 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1105 (_ BitVec 32)) (v_nondet_tree_~n~0.base_94 (_ BitVec 32)) (v_nondet_tree_~n~0.base_93 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_94 v_ArrVal_1105) v_nondet_tree_~n~0.base_93 (_ bv12 32)) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_94) (_ bv0 1)))) is different from true [2022-11-23 02:34:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:04,882 INFO L321 Elim1Store]: treesize reduction 67, result has 25.6 percent of original size [2022-11-23 02:34:04,882 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 [2022-11-23 02:34:04,920 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:34:04,921 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 [2022-11-23 02:34:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 60 not checked. [2022-11-23 02:34:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:05,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622847982] [2022-11-23 02:34:05,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622847982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [962022] [2022-11-23 02:34:05,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:34:05,436 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:34:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:34:05,437 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:34:05,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-23 02:34:05,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:34:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:05,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:34:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:05,965 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 [2022-11-23 02:34:05,971 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 [2022-11-23 02:34:06,023 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1236 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1236))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1237 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1237))))) is different from true [2022-11-23 02:34:06,088 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1236 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1237 (_ BitVec 1))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1236)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_1237)))) is different from true [2022-11-23 02:34:06,128 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1238 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1238))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:34:06,176 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1238 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1238)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:34:06,274 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1238 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_114 (_ BitVec 32))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_114) (_ bv0 1)) (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_114 v_ArrVal_1238) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-23 02:34:06,333 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1236 (_ BitVec 32)) (v_ArrVal_1238 (_ BitVec 32)) (v_nondet_tree_~n~0.base_115 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1237 (_ BitVec 1)) (v_nondet_tree_~n~0.base_114 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_115)) (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_115 v_ArrVal_1237) v_nondet_tree_~n~0.base_114)) (= |c_#length| (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_115 v_ArrVal_1236) v_nondet_tree_~n~0.base_114 v_ArrVal_1238) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-23 02:34:06,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:06,486 INFO L321 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2022-11-23 02:34:06,487 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 [2022-11-23 02:34:06,552 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-23 02:34:06,552 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 [2022-11-23 02:34:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 66 not checked. [2022-11-23 02:34:06,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [962022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:13,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:34:13,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2022-11-23 02:34:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332949456] [2022-11-23 02:34:13,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:34:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:34:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:34:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:34:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=60, Unknown=12, NotChecked=264, Total=380 [2022-11-23 02:34:13,417 INFO L87 Difference]: Start difference. First operand 228 states and 285 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 02:34:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:34:40,386 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2022-11-23 02:34:40,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:34:40,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) Word has length 57 [2022-11-23 02:34:40,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:34:40,388 INFO L225 Difference]: With dead ends: 242 [2022-11-23 02:34:40,388 INFO L226 Difference]: Without dead ends: 242 [2022-11-23 02:34:40,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=83, Invalid=144, Unknown=27, NotChecked=396, Total=650 [2022-11-23 02:34:40,389 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 122 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2351 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:34:40,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 209 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 402 Invalid, 0 Unknown, 2351 Unchecked, 1.7s Time] [2022-11-23 02:34:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-23 02:34:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 232. [2022-11-23 02:34:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 136 states have (on average 1.4411764705882353) internal successors, (196), 185 states have internal predecessors, (196), 31 states have call successors, (31), 10 states have call predecessors, (31), 16 states have return successors, (68), 36 states have call predecessors, (68), 31 states have call successors, (68) [2022-11-23 02:34:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2022-11-23 02:34:40,401 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 57 [2022-11-23 02:34:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:34:40,402 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2022-11-23 02:34:40,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 02:34:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2022-11-23 02:34:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 02:34:40,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:34:40,403 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-23 02:34:40,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-11-23 02:34:40,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 02:34:40,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:34:40,810 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:34:40,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:34:40,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1873527920, now seen corresponding path program 3 times [2022-11-23 02:34:40,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:34:40,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796367688] [2022-11-23 02:34:40,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:34:40,811 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 [2022-11-23 02:34:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:34:40,812 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:34:40,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:34:41,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-23 02:34:41,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 02:34:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:41,527 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 [2022-11-23 02:34:41,836 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1391 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1391) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:34:41,891 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1391 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1391) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:34:41,974 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1389 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1391 (_ BitVec 32)) (v_nondet_tree_~n~0.base_135 (_ BitVec 32))) (and (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1389) v_nondet_tree_~n~0.base_135 v_ArrVal_1391) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_135) (_ bv0 1)))) is different from true [2022-11-23 02:34:44,226 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1389 (_ BitVec 32)) (v_ArrVal_1388 (_ BitVec 32)) (|nondet_tree_#res.base| (_ BitVec 32)) (v_ArrVal_1391 (_ BitVec 32)) (v_nondet_tree_~n~0.base_135 (_ BitVec 32)) (v_nondet_tree_~n~0.base_136 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |nondet_tree_#res.base| (_ bv1 1)))) (and (= (_ bv0 1) (select (store .cse0 v_nondet_tree_~n~0.base_136 (_ bv1 1)) v_nondet_tree_~n~0.base_135)) (= (_ bv0 1) (select |c_old(#valid)| |nondet_tree_#res.base|)) (= (store (store (store |c_old(#length)| |nondet_tree_#res.base| v_ArrVal_1388) v_nondet_tree_~n~0.base_136 v_ArrVal_1389) v_nondet_tree_~n~0.base_135 v_ArrVal_1391) |c_#length|) (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_136))))) is different from true [2022-11-23 02:34:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:44,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:44,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:44,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:44,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:34:44,284 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 [2022-11-23 02:34:44,334 INFO L321 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2022-11-23 02:34:44,334 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 [2022-11-23 02:34:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 70 proven. 31 refuted. 0 times theorem prover too weak. 27 trivial. 68 not checked. [2022-11-23 02:34:44,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:34:49,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:34:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796367688] [2022-11-23 02:34:49,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796367688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:34:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635752617] [2022-11-23 02:34:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:34:49,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:34:49,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:34:49,203 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:34:49,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-23 02:34:50,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-23 02:34:50,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:34:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 02:34:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:34:50,552 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 [2022-11-23 02:34:50,699 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1389 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1389) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:35:03,386 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1389 (_ BitVec 32)) (v_ArrVal_1388 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_1550 (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)))) (and (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1389) |c_nondet_tree_#t~ret9.base| v_ArrVal_1388) |nondet_tree_#t~ret8.base| v_ArrVal_1550) |c_#length|) (= (_ bv0 1) (select .cse0 |c_nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select (store .cse0 |c_nondet_tree_#t~ret9.base| (_ bv1 1)) |nondet_tree_#t~ret8.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base))))) is different from true [2022-11-23 02:35:03,424 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1389 (_ BitVec 32)) (v_ArrVal_1388 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (|nondet_tree_#t~ret9.base| (_ BitVec 32)) (v_ArrVal_1550 (_ BitVec 32)) (|nondet_tree_#t~ret8.base| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 |nondet_tree_#t~ret9.base|)) (= (_ bv0 1) (select (store .cse0 |nondet_tree_#t~ret9.base| (_ bv1 1)) |nondet_tree_#t~ret8.base|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_1389) |nondet_tree_#t~ret9.base| v_ArrVal_1388) |nondet_tree_#t~ret8.base| v_ArrVal_1550) |c_#length|)))) is different from true [2022-11-23 02:35:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:03,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:03,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:03,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:35:03,511 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 [2022-11-23 02:35:03,556 INFO L321 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2022-11-23 02:35:03,556 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 [2022-11-23 02:35:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 27 trivial. 28 not checked. [2022-11-23 02:35:03,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:35:12,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635752617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:35:12,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:35:12,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 20 [2022-11-23 02:35:12,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949444460] [2022-11-23 02:35:12,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:35:12,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:35:12,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:35:12,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:35:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=230, Unknown=16, NotChecked=252, Total=552 [2022-11-23 02:35:12,693 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 11 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-23 02:35:14,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:16,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:22,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:24,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:26,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:28,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:30,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:32,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:34,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:40,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:42,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:45,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:47,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:49,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:51,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:57,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:35:59,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:01,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:03,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:05,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:07,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:15,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:17,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:19,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:22,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:26,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:28,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:38,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:40,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:42,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:36:52,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:37:46,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:37:52,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:37:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:37:54,295 INFO L93 Difference]: Finished difference Result 249 states and 340 transitions. [2022-11-23 02:37:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:37:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 11 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 69 [2022-11-23 02:37:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:37:54,298 INFO L225 Difference]: With dead ends: 249 [2022-11-23 02:37:54,298 INFO L226 Difference]: Without dead ends: 249 [2022-11-23 02:37:54,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 111.8s TimeCoverageRelationStatistics Valid=124, Invalid=466, Unknown=38, NotChecked=364, Total=992 [2022-11-23 02:37:54,299 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 209 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 72 mSolverCounterUnsat, 66 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 66 IncrementalHoareTripleChecker+Unknown, 1593 IncrementalHoareTripleChecker+Unchecked, 76.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:37:54,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 455 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1561 Invalid, 66 Unknown, 1593 Unchecked, 76.9s Time] [2022-11-23 02:37:54,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-23 02:37:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 228. [2022-11-23 02:37:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.4511278195488722) internal successors, (193), 182 states have internal predecessors, (193), 31 states have call successors, (31), 10 states have call predecessors, (31), 15 states have return successors, (61), 35 states have call predecessors, (61), 31 states have call successors, (61) [2022-11-23 02:37:54,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 285 transitions. [2022-11-23 02:37:54,310 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 285 transitions. Word has length 69 [2022-11-23 02:37:54,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:37:54,310 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 285 transitions. [2022-11-23 02:37:54,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 11 states have call successors, (15), 3 states have call predecessors, (15), 9 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-11-23 02:37:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 285 transitions. [2022-11-23 02:37:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 02:37:54,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:37:54,312 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] [2022-11-23 02:37:54,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:54,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 02:37:54,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:37:54,721 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:37:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:37:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1322566655, now seen corresponding path program 1 times [2022-11-23 02:37:54,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:37:54,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596536410] [2022-11-23 02:37:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:37:54,722 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 [2022-11-23 02:37:54,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:37:54,723 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:37:54,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:37:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:37:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 02:37:54,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:37:54,949 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 [2022-11-23 02:37:54,957 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 [2022-11-23 02:37:55,380 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 [2022-11-23 02:37:55,386 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 [2022-11-23 02:37:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:37:55,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:37:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:37:55,943 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:37:55,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596536410] [2022-11-23 02:37:55,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596536410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:37:55,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:37:55,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2022-11-23 02:37:55,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536336671] [2022-11-23 02:37:55,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:37:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:37:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:37:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:37:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:37:55,945 INFO L87 Difference]: Start difference. First operand 228 states and 285 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) [2022-11-23 02:37:58,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:00,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:03,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:05,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:07,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:09,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:12,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:14,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:14,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:38:14,342 INFO L93 Difference]: Finished difference Result 361 states and 459 transitions. [2022-11-23 02:38:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:38:14,344 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 [2022-11-23 02:38:14,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:38:14,345 INFO L225 Difference]: With dead ends: 361 [2022-11-23 02:38:14,345 INFO L226 Difference]: Without dead ends: 361 [2022-11-23 02:38:14,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-23 02:38:14,346 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 122 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 22 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:38:14,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 2175 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 492 Invalid, 8 Unknown, 0 Unchecked, 18.0s Time] [2022-11-23 02:38:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-23 02:38:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 310. [2022-11-23 02:38:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 192 states have (on average 1.421875) internal successors, (273), 242 states have internal predecessors, (273), 43 states have call successors, (43), 17 states have call predecessors, (43), 26 states have return successors, (98), 50 states have call predecessors, (98), 43 states have call successors, (98) [2022-11-23 02:38:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 414 transitions. [2022-11-23 02:38:14,359 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 414 transitions. Word has length 38 [2022-11-23 02:38:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:38:14,360 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 414 transitions. [2022-11-23 02:38:14,360 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) [2022-11-23 02:38:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 414 transitions. [2022-11-23 02:38:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 02:38:14,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:38:14,361 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] [2022-11-23 02:38:14,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-23 02:38:14,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:38:14,573 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:38:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:38:14,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1592442388, now seen corresponding path program 2 times [2022-11-23 02:38:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:38:14,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46340812] [2022-11-23 02:38:14,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:38:14,574 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 [2022-11-23 02:38:14,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:38:14,575 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:38:14,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:38:14,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:38:14,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:38:14,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 02:38:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:38:14,964 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 [2022-11-23 02:38:15,089 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 [2022-11-23 02:38:15,097 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 [2022-11-23 02:38:15,437 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1682 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_1682) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1681 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_1681))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:15,474 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 [2022-11-23 02:38:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:15,481 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 [2022-11-23 02:38:15,493 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:38:15,493 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 [2022-11-23 02:38:15,546 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 [2022-11-23 02:38:15,557 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 [2022-11-23 02:38:15,887 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 [2022-11-23 02:38:15,891 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 [2022-11-23 02:38:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-23 02:38:16,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:38:18,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:38:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46340812] [2022-11-23 02:38:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46340812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:38:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1326911243] [2022-11-23 02:38:18,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:38:18,917 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:38:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:38:18,918 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:38:18,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-23 02:38:19,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:38:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:38:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-23 02:38:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:38:19,355 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 [2022-11-23 02:38:19,414 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 [2022-11-23 02:38:19,421 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 [2022-11-23 02:38:19,636 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1794 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_1794))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (exists ((v_ArrVal_1793 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_1793) |c_#memory_$Pointer$.base|)))) is different from true [2022-11-23 02:38:19,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:19,670 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 [2022-11-23 02:38:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:19,680 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 [2022-11-23 02:38:19,692 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:38:19,692 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 [2022-11-23 02:38:19,705 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 [2022-11-23 02:38:19,720 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 [2022-11-23 02:38:19,839 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 [2022-11-23 02:38:19,841 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 [2022-11-23 02:38:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-23 02:38:19,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:38:21,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1326911243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:38:21,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:38:21,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2022-11-23 02:38:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331509025] [2022-11-23 02:38:21,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:38:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 02:38:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:38:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 02:38:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=634, Unknown=6, NotChecked=102, Total=812 [2022-11-23 02:38:21,877 INFO L87 Difference]: Start difference. First operand 310 states and 414 transitions. Second operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 02:38:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:38:26,935 INFO L93 Difference]: Finished difference Result 369 states and 498 transitions. [2022-11-23 02:38:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 02:38:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-11-23 02:38:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:38:26,941 INFO L225 Difference]: With dead ends: 369 [2022-11-23 02:38:26,941 INFO L226 Difference]: Without dead ends: 369 [2022-11-23 02:38:26,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=8, NotChecked=166, Total=1980 [2022-11-23 02:38:26,942 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 258 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 97 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:38:26,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1094 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1702 Invalid, 17 Unknown, 474 Unchecked, 3.7s Time] [2022-11-23 02:38:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-23 02:38:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 332. [2022-11-23 02:38:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 208 states have (on average 1.3990384615384615) internal successors, (291), 259 states have internal predecessors, (291), 46 states have call successors, (46), 19 states have call predecessors, (46), 29 states have return successors, (105), 53 states have call predecessors, (105), 46 states have call successors, (105) [2022-11-23 02:38:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 442 transitions. [2022-11-23 02:38:26,956 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 442 transitions. Word has length 45 [2022-11-23 02:38:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:38:26,956 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 442 transitions. [2022-11-23 02:38:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 02:38:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 442 transitions. [2022-11-23 02:38:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-23 02:38:26,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:38:26,959 INFO L195 NwaCegarLoop]: trace histogram [18, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1] [2022-11-23 02:38:26,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:38:27,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-23 02:38:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt [2022-11-23 02:38:27,372 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:38:27,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:38:27,373 INFO L85 PathProgramCache]: Analyzing trace with hash -579793882, now seen corresponding path program 4 times [2022-11-23 02:38:27,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:38:27,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673246377] [2022-11-23 02:38:27,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:38:27,373 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 [2022-11-23 02:38:27,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:38:27,374 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:38:27,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:38:28,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:38:28,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:38:28,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 02:38:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:38:28,523 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 [2022-11-23 02:38:28,531 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 [2022-11-23 02:38:28,614 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2113 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2113) |c_#valid|)) (exists ((v_ArrVal_2112 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2112) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:28,667 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2113 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2112 (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2112) |c_#length|) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2113) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:28,796 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 02:38:28,797 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 [2022-11-23 02:38:28,807 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 [2022-11-23 02:38:28,858 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2114 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2114) |c_#length|)) (exists ((v_ArrVal_2115 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2115))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:28,900 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2116 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2116) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:28,947 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2116 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2116) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:29,048 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2114 (_ BitVec 32)) (v_ArrVal_2116 (_ BitVec 32)) (v_nondet_tree_~n~0.base_197 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2115 (_ BitVec 1))) (and (= (_ bv0 1) (select (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2115) v_nondet_tree_~n~0.base_197)) (= (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2114) v_nondet_tree_~n~0.base_197 v_ArrVal_2116) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:29,244 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 [2022-11-23 02:38:29,362 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2117 (_ BitVec 32)) (v_nondet_tree_~n~0.base_198 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= |c_#length| (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2117) v_nondet_tree_~n~0.base_198 (_ bv12 32))))) is different from true [2022-11-23 02:38:29,497 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2117 (_ BitVec 32)) (v_nondet_tree_~n~0.base_199 (_ BitVec 32)) (v_nondet_tree_~n~0.base_198 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2120 (_ BitVec 32))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (bvule (_ bv12 32) (select |c_#length| v_nondet_tree_~n~0.base_199)) (= |c_#length| (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2120) v_nondet_tree_~n~0.base_199 v_ArrVal_2117) v_nondet_tree_~n~0.base_198 (_ bv12 32))))) is different from true [2022-11-23 02:38:29,611 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2114 (_ BitVec 32)) (v_ArrVal_2117 (_ BitVec 32)) (v_ArrVal_2116 (_ BitVec 32)) (v_nondet_tree_~n~0.base_199 (_ BitVec 32)) (v_nondet_tree_~n~0.base_200 (_ BitVec 32)) (v_nondet_tree_~n~0.base_197 (_ BitVec 32)) (v_nondet_tree_~n~0.base_198 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2120 (_ BitVec 32)) (v_ArrVal_2115 (_ BitVec 1))) (and (= (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_200 v_ArrVal_2115) v_nondet_tree_~n~0.base_197) (_ bv0 1)) (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (bvule (_ bv12 32) (select |c_#length| v_nondet_tree_~n~0.base_199)) (= (store (store (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_200 v_ArrVal_2114) v_nondet_tree_~n~0.base_197 v_ArrVal_2116) nondet_tree_~n~0.base v_ArrVal_2120) v_nondet_tree_~n~0.base_199 v_ArrVal_2117) v_nondet_tree_~n~0.base_198 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_200)))) is different from true [2022-11-23 02:38:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:30,190 INFO L321 Elim1Store]: treesize reduction 172, result has 28.0 percent of original size [2022-11-23 02:38:30,190 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 5 case distinctions, treesize of input 24 treesize of output 75 [2022-11-23 02:38:30,279 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-23 02:38:30,279 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 [2022-11-23 02:38:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 349 proven. 82 refuted. 2 times theorem prover too weak. 135 trivial. 267 not checked. [2022-11-23 02:38:30,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:38:36,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:38:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673246377] [2022-11-23 02:38:36,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673246377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:38:36,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [216208842] [2022-11-23 02:38:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:38:36,021 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:38:36,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:38:36,021 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:38:36,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-23 02:38:38,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:38:38,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:38:38,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-23 02:38:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:38:38,903 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 [2022-11-23 02:38:38,910 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 [2022-11-23 02:38:38,967 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2424 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2424) |c_#length|)) (exists ((v_ArrVal_2423 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2423))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:39,027 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2424 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2423 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2423)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2424) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:39,155 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 [2022-11-23 02:38:39,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 02:38:39,186 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 [2022-11-23 02:38:39,445 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2428 (_ BitVec 32)) (nondet_tree_~n~0.base (_ 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_2428)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:39,978 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2431 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2431) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:40,009 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2431 (_ 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_2431) |c_#length|))) is different from true [2022-11-23 02:38:40,086 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_240 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2431 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_240)) (= |c_#length| (store (store |c_old(#length)| v_nondet_tree_~n~0.base_240 v_ArrVal_2431) nondet_tree_~n~0.base (_ bv12 32))))) is different from true [2022-11-23 02:38:40,134 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_nondet_tree_~n~0.base_240 (_ BitVec 32)) (v_nondet_tree_~n~0.base_241 (_ BitVec 32)) (v_ArrVal_2428 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2431 (_ BitVec 32))) (and (= (select (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) v_nondet_tree_~n~0.base_240) (_ bv0 1)) (= (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2428) v_nondet_tree_~n~0.base_240 v_ArrVal_2431) v_nondet_tree_~n~0.base_241 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:38:40,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:38:40,944 INFO L321 Elim1Store]: treesize reduction 67, result has 40.2 percent of original size [2022-11-23 02:38:40,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 53 [2022-11-23 02:38:41,107 INFO L321 Elim1Store]: treesize reduction 79, result has 21.8 percent of original size [2022-11-23 02:38:41,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 116 [2022-11-23 02:38:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 349 proven. 105 refuted. 0 times theorem prover too weak. 134 trivial. 247 not checked. [2022-11-23 02:38:41,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:38:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [216208842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:38:52,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:38:52,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-11-23 02:38:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999797379] [2022-11-23 02:38:52,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:38:52,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 02:38:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:38:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 02:38:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=267, Unknown=29, NotChecked=816, Total=1190 [2022-11-23 02:38:52,970 INFO L87 Difference]: Start difference. First operand 332 states and 442 transitions. Second operand has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 27 states have internal predecessors, (100), 18 states have call successors, (23), 3 states have call predecessors, (23), 14 states have return successors, (26), 19 states have call predecessors, (26), 18 states have call successors, (26) [2022-11-23 02:38:55,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:38:59,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:01,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:03,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:05,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:09,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:11,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:13,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:15,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:19,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:24,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:26,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:29,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:35,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:37,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:39,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:43,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:49,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:56,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:39:58,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:00,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:09,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:13,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:22,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:24,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:34,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:42,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:45,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:47,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:40:57,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:09,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:13,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:14,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:17,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:27,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:29,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:31,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:34,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:41:36,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:00,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:02,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:05,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:11,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:13,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:36,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:42:59,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:43:01,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:43:04,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:43:07,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 02:43:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:43:14,791 INFO L93 Difference]: Finished difference Result 382 states and 597 transitions. [2022-11-23 02:43:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:43:14,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 27 states have internal predecessors, (100), 18 states have call successors, (23), 3 states have call predecessors, (23), 14 states have return successors, (26), 19 states have call predecessors, (26), 18 states have call successors, (26) Word has length 135 [2022-11-23 02:43:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:43:14,795 INFO L225 Difference]: With dead ends: 382 [2022-11-23 02:43:14,796 INFO L226 Difference]: Without dead ends: 382 [2022-11-23 02:43:14,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 237 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 17 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 147.8s TimeCoverageRelationStatistics Valid=189, Invalid=627, Unknown=64, NotChecked=1190, Total=2070 [2022-11-23 02:43:14,797 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 206 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 103 mSolverCounterUnsat, 150 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 6487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 150 IncrementalHoareTripleChecker+Unknown, 4183 IncrementalHoareTripleChecker+Unchecked, 129.7s IncrementalHoareTripleChecker+Time [2022-11-23 02:43:14,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 503 Invalid, 6487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2051 Invalid, 150 Unknown, 4183 Unchecked, 129.7s Time] [2022-11-23 02:43:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-23 02:43:14,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 347. [2022-11-23 02:43:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 219 states have (on average 1.3789954337899544) internal successors, (302), 270 states have internal predecessors, (302), 47 states have call successors, (47), 19 states have call predecessors, (47), 32 states have return successors, (137), 57 states have call predecessors, (137), 47 states have call successors, (137) [2022-11-23 02:43:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 486 transitions. [2022-11-23 02:43:14,822 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 486 transitions. Word has length 135 [2022-11-23 02:43:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:43:14,823 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 486 transitions. [2022-11-23 02:43:14,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.225806451612903) internal successors, (100), 27 states have internal predecessors, (100), 18 states have call successors, (23), 3 states have call predecessors, (23), 14 states have return successors, (26), 19 states have call predecessors, (26), 18 states have call successors, (26) [2022-11-23 02:43:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 486 transitions. [2022-11-23 02:43:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 02:43:14,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:43:14,825 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] [2022-11-23 02:43:14,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-23 02:43:15,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:43:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:43:15,241 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting minErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:43:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522260, now seen corresponding path program 3 times [2022-11-23 02:43:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:43:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811129612] [2022-11-23 02:43:15,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:43:15,242 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 [2022-11-23 02:43:15,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:43:15,243 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:43:15,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:43:15,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:43:15,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:43:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 02:43:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:43:15,753 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 [2022-11-23 02:43:15,844 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 [2022-11-23 02:43:16,129 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 [2022-11-23 02:43:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 02:43:16,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:43:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 02:43:17,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:43:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811129612] [2022-11-23 02:43:17,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811129612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:43:17,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:43:17,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2022-11-23 02:43:17,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113772187] [2022-11-23 02:43:17,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:43:17,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:43:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:43:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:43:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:43:17,387 INFO L87 Difference]: Start difference. First operand 347 states and 486 transitions. Second operand has 18 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-11-23 02:43:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:43:25,633 INFO L93 Difference]: Finished difference Result 391 states and 546 transitions. [2022-11-23 02:43:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 02:43:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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 [2022-11-23 02:43:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:43:25,637 INFO L225 Difference]: With dead ends: 391 [2022-11-23 02:43:25,637 INFO L226 Difference]: Without dead ends: 391 [2022-11-23 02:43:25,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 02:43:25,639 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 204 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 2558 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:43:25,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1112 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2558 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-23 02:43:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-23 02:43:25,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 361. [2022-11-23 02:43:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 230 states have (on average 1.3869565217391304) internal successors, (319), 281 states have internal predecessors, (319), 49 states have call successors, (49), 20 states have call predecessors, (49), 33 states have return successors, (139), 59 states have call predecessors, (139), 49 states have call successors, (139) [2022-11-23 02:43:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 507 transitions. [2022-11-23 02:43:25,657 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 507 transitions. Word has length 45 [2022-11-23 02:43:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:43:25,658 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 507 transitions. [2022-11-23 02:43:25,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 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) [2022-11-23 02:43:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 507 transitions. [2022-11-23 02:43:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 02:43:25,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:43:25,660 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] [2022-11-23 02:43:25,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-23 02:43:25,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:43:25,876 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting minErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:43:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:25,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1134522261, now seen corresponding path program 1 times [2022-11-23 02:43:25,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:43:25,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075364506] [2022-11-23 02:43:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:43:25,877 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 [2022-11-23 02:43:25,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:43:25,878 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:43:25,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-23 02:43:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:43:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 02:43:26,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:43:26,277 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 [2022-11-23 02:43:26,457 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 [2022-11-23 02:43:26,470 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 [2022-11-23 02:43:26,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 02:43:26,656 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 [2022-11-23 02:43:27,139 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 [2022-11-23 02:43:27,143 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 [2022-11-23 02:43:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:43:27,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:43:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:43:33,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:43:33,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075364506] [2022-11-23 02:43:33,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075364506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:43:33,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:43:33,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-23 02:43:33,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610529644] [2022-11-23 02:43:33,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:43:33,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 02:43:33,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:43:33,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 02:43:33,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-23 02:43:33,960 INFO L87 Difference]: Start difference. First operand 361 states and 507 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) [2022-11-23 02:43:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:43:55,040 INFO L93 Difference]: Finished difference Result 409 states and 573 transitions. [2022-11-23 02:43:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 02:43:55,041 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 [2022-11-23 02:43:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:43:55,044 INFO L225 Difference]: With dead ends: 409 [2022-11-23 02:43:55,044 INFO L226 Difference]: Without dead ends: 409 [2022-11-23 02:43:55,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 02:43:55,046 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 403 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 3749 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 3903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 3749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:43:55,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 1155 Invalid, 3903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 3749 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2022-11-23 02:43:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-23 02:43:55,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 391. [2022-11-23 02:43:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 253 states have (on average 1.3715415019762847) internal successors, (347), 304 states have internal predecessors, (347), 54 states have call successors, (54), 22 states have call predecessors, (54), 35 states have return successors, (144), 64 states have call predecessors, (144), 54 states have call successors, (144) [2022-11-23 02:43:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 545 transitions. [2022-11-23 02:43:55,066 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 545 transitions. Word has length 45 [2022-11-23 02:43:55,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:43:55,067 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 545 transitions. [2022-11-23 02:43:55,067 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) [2022-11-23 02:43:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 545 transitions. [2022-11-23 02:43:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-23 02:43:55,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:43:55,072 INFO L195 NwaCegarLoop]: trace histogram [21, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 1, 1, 1, 1] [2022-11-23 02:43:55,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-23 02:43:55,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:43:55,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting nondet_treeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [nondet_treeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, nondet_treeErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2022-11-23 02:43:55,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:43:55,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1300883128, now seen corresponding path program 5 times [2022-11-23 02:43:55,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:43:55,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127352282] [2022-11-23 02:43:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:43:55,290 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 [2022-11-23 02:43:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:43:55,294 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:43:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:43:59,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-23 02:43:59,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:43:59,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-23 02:43:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:43:59,251 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 [2022-11-23 02:43:59,366 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2923 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2923) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:43:59,455 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2923 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2923) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:43:59,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:43:59,553 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 [2022-11-23 02:43:59,575 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:43:59,576 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 [2022-11-23 02:43:59,694 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2927 (_ BitVec 1))) (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2927) |c_#valid|)) (exists ((v_ArrVal_2926 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2926))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:43:59,759 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2927 (_ BitVec 1)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2926 (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2927) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2926)))) is different from true [2022-11-23 02:44:02,113 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_2930 (_ BitVec 32))) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2930) |c_#length|)) (exists ((v_ArrVal_2931 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2931))))) is different from true [2022-11-23 02:44:02,198 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2930 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2931 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2931)) (= (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2930) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:44:04,508 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (= (store |c_old(#valid)| nondet_tree_~n~0.base (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-23 02:44:04,611 WARN L859 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2934 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2934))) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:44:04,685 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2934 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2934)) (= (_ bv0 1) (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2022-11-23 02:44:04,722 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 [2022-11-23 02:44:04,810 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2934 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_304 (_ BitVec 32))) (and (= (store (store |c_old(#length)| v_nondet_tree_~n~0.base_304 v_ArrVal_2934) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| v_nondet_tree_~n~0.base_304)))) is different from true [2022-11-23 02:44:04,864 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2934 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_nondet_tree_~n~0.base_304 (_ BitVec 32)) (v_nondet_tree_~n~0.base_305 (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_old(#valid)| v_nondet_tree_~n~0.base_305 (_ bv1 1)) v_nondet_tree_~n~0.base_304)) (= (store (store (store |c_old(#length)| v_nondet_tree_~n~0.base_305 (_ bv12 32)) v_nondet_tree_~n~0.base_304 v_ArrVal_2934) nondet_tree_~n~0.base (_ bv12 32)) |c_#length|))) is different from true [2022-11-23 02:44:05,137 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2928 (_ BitVec 1)) (v_ArrVal_2930 (_ BitVec 32)) (v_ArrVal_2934 (_ BitVec 32)) (nondet_tree_~n~0.base (_ BitVec 32)) (v_ArrVal_2931 (_ BitVec 1)) (v_nondet_tree_~n~0.base_303 (_ BitVec 32)) (v_nondet_tree_~n~0.base_306 (_ BitVec 32)) (v_ArrVal_2929 (_ BitVec 32)) (v_nondet_tree_~n~0.base_304 (_ BitVec 32)) (v_nondet_tree_~n~0.base_305 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| nondet_tree_~n~0.base v_ArrVal_2928))) (and (bvule (_ bv12 32) (select |c_#length| nondet_tree_~n~0.base)) (= (_ bv0 1) (select .cse0 v_nondet_tree_~n~0.base_303)) (= (store (store (store (store (store |c_old(#length)| nondet_tree_~n~0.base v_ArrVal_2929) v_nondet_tree_~n~0.base_303 v_ArrVal_2930) v_nondet_tree_~n~0.base_305 (_ bv12 32)) v_nondet_tree_~n~0.base_304 v_ArrVal_2934) v_nondet_tree_~n~0.base_306 (_ bv12 32)) |c_#length|) (= (_ bv0 1) (select (store (store .cse0 v_nondet_tree_~n~0.base_303 v_ArrVal_2931) v_nondet_tree_~n~0.base_305 (_ bv1 1)) v_nondet_tree_~n~0.base_304))))) is different from true [2022-11-23 02:44:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:44:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:44:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:44:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:44:09,162 INFO L321 Elim1Store]: treesize reduction 379, result has 19.7 percent of original size [2022-11-23 02:44:09,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 30 treesize of output 101 [2022-11-23 02:44:09,788 INFO L321 Elim1Store]: treesize reduction 22, result has 78.2 percent of original size [2022-11-23 02:44:09,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 15258 treesize of output 15200 [2022-11-23 02:44:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 323 proven. 138 refuted. 1 times theorem prover too weak. 167 trivial. 455 not checked. [2022-11-23 02:44:14,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:44:20,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:44:20,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127352282] [2022-11-23 02:44:20,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127352282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:44:20,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488972399] [2022-11-23 02:44:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:44:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 02:44:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 02:44:20,397 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 02:44:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-23 02:44:21,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:44:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20956854] [2022-11-23 02:44:21,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:44:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:44:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:44:21,168 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:44:21,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 1 [2022-11-23 02:44:21,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ed6ebae-c3dc-4ae2-860c-f3e67e32789a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process