./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0137.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0137.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a --- 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-38b53e6 [2022-11-25 17:59:16,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:59:16,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:59:16,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:59:16,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:59:16,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:59:16,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:59:16,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:59:16,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:59:16,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:59:16,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:59:16,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:59:16,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:59:16,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:59:16,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:59:16,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:59:16,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:59:16,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:59:16,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:59:16,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:59:16,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:59:16,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:59:16,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:59:16,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:59:16,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:59:16,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:59:16,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:59:16,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:59:16,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:59:16,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:59:16,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:59:16,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:59:16,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:59:16,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:59:16,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:59:16,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:59:16,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:59:16,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:59:16,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:59:16,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:59:16,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:59:16,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:59:16,394 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:59:16,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:59:16,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:59:16,395 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:59:16,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:59:16,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:59:16,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:59:16,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:59:16,398 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:59:16,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:59:16,400 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:59:16,400 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:59:16,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:59:16,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:59:16,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:59:16,401 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:59:16,401 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:59:16,401 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:59:16,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:59:16,402 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:59:16,402 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:59:16,402 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:59:16,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:59:16,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:59:16,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:59:16,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:59:16,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:59:16,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:59:16,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:59:16,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:59:16,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:59:16,405 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:59:16,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:59:16,405 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_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a [2022-11-25 17:59:16,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:59:16,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:59:16,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:59:16,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:59:16,769 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:59:16,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/memsafety/test-0137.i [2022-11-25 17:59:19,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:59:20,057 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:59:20,058 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/sv-benchmarks/c/memsafety/test-0137.i [2022-11-25 17:59:20,083 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data/22ba233b2/cdc731c276dc4aacabceb7a4611ab1cb/FLAGd619a0482 [2022-11-25 17:59:20,098 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data/22ba233b2/cdc731c276dc4aacabceb7a4611ab1cb [2022-11-25 17:59:20,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:59:20,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:59:20,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:59:20,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:59:20,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:59:20,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:20" (1/1) ... [2022-11-25 17:59:20,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1071cd53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:20, skipping insertion in model container [2022-11-25 17:59:20,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:20" (1/1) ... [2022-11-25 17:59:20,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:59:20,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:59:20,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:59:20,557 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) [2022-11-25 17:59:20,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c8fc015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:20, skipping insertion in model container [2022-11-25 17:59:20,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:59:20,560 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 17:59:20,563 INFO L158 Benchmark]: Toolchain (without parser) took 452.67ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 114.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:59:20,564 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 159.4MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:59:20,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 446.11ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 114.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:59:20,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 159.4MB. Free memory is still 103.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 446.11ms. Allocated memory is still 159.4MB. Free memory was 126.9MB in the beginning and 114.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 585]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0137.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a --- 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-38b53e6 [2022-11-25 17:59:22,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:59:22,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:59:22,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:59:22,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:59:22,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:59:22,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:59:22,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:59:22,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:59:22,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:59:22,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:59:22,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:59:22,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:59:22,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:59:22,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:59:22,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:59:22,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:59:22,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:59:22,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:59:22,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:59:22,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:59:22,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:59:22,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:59:22,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:59:22,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:59:22,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:59:22,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:59:22,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:59:22,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:59:22,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:59:22,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:59:22,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:59:22,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:59:22,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:59:22,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:59:22,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:59:22,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:59:22,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:59:22,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:59:22,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:59:22,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:59:22,981 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 17:59:23,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:59:23,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:59:23,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:59:23,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:59:23,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:59:23,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:59:23,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:59:23,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:59:23,009 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:59:23,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:59:23,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:59:23,010 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:59:23,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:59:23,010 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:59:23,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:59:23,011 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:59:23,011 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:59:23,011 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:59:23,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:59:23,011 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:59:23,012 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 17:59:23,012 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 17:59:23,012 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:59:23,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:59:23,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:59:23,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:59:23,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:59:23,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:59:23,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:59:23,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:59:23,014 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 17:59:23,014 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 17:59:23,014 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:59:23,014 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:59:23,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:59:23,015 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 17:59:23,015 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_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c2d362b3c58f37a9b1e964b448eb3d54c85d26676417295a73853b3a7cc716a [2022-11-25 17:59:23,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:59:23,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:59:23,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:59:23,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:59:23,411 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:59:23,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/memsafety/test-0137.i [2022-11-25 17:59:26,516 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:59:26,806 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:59:26,807 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/sv-benchmarks/c/memsafety/test-0137.i [2022-11-25 17:59:26,820 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data/f8228dc6b/01338b9b3771414c91067854fb2fe1de/FLAGb14c30660 [2022-11-25 17:59:26,840 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/data/f8228dc6b/01338b9b3771414c91067854fb2fe1de [2022-11-25 17:59:26,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:59:26,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:59:26,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:59:26,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:59:26,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:59:26,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:26" (1/1) ... [2022-11-25 17:59:26,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37994d1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:26, skipping insertion in model container [2022-11-25 17:59:26,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:59:26" (1/1) ... [2022-11-25 17:59:26,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:59:26,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:59:27,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:59:27,291 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 17:59:27,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:59:27,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:59:27,390 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:59:27,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:59:27,482 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:59:27,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27 WrapperNode [2022-11-25 17:59:27,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:59:27,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:59:27,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:59:27,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:59:27,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,557 INFO L138 Inliner]: procedures = 140, calls = 60, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 137 [2022-11-25 17:59:27,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:59:27,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:59:27,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:59:27,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:59:27,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,615 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:59:27,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:59:27,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:59:27,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:59:27,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (1/1) ... [2022-11-25 17:59:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:59:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:27,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:59:27,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:59:27,715 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-25 17:59:27,715 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-25 17:59:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 17:59:27,716 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del [2022-11-25 17:59:27,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del [2022-11-25 17:59:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:59:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:59:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:59:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:59:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:59:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-25 17:59:27,719 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-25 17:59:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:59:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 17:59:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 17:59:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 17:59:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2022-11-25 17:59:27,720 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2022-11-25 17:59:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:59:27,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:59:27,928 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:59:27,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:59:28,667 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:59:28,674 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:59:28,675 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:59:28,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:28 BoogieIcfgContainer [2022-11-25 17:59:28,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:59:28,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:59:28,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:59:28,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:59:28,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:59:26" (1/3) ... [2022-11-25 17:59:28,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1982b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:28, skipping insertion in model container [2022-11-25 17:59:28,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:59:27" (2/3) ... [2022-11-25 17:59:28,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d1982b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:59:28, skipping insertion in model container [2022-11-25 17:59:28,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:59:28" (3/3) ... [2022-11-25 17:59:28,688 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0137.i [2022-11-25 17:59:28,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:59:28,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2022-11-25 17:59:28,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:59:28,762 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;@19e0427a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:59:28,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-11-25 17:59:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 129 states have internal predecessors, (141), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:59:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 17:59:28,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:28,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:59:28,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash 66866992, now seen corresponding path program 1 times [2022-11-25 17:59:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845216575] [2022-11-25 17:59:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:28,792 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 [2022-11-25 17:59:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:28,797 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:28,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:28,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:59:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:28,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:28,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:28,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845216575] [2022-11-25 17:59:28,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845216575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:28,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:28,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:59:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983446003] [2022-11-25 17:59:28,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:59:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:59:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:59:28,978 INFO L87 Difference]: Start difference. First operand has 141 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 129 states have internal predecessors, (141), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:29,023 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-11-25 17:59:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:59:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 17:59:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:29,038 INFO L225 Difference]: With dead ends: 141 [2022-11-25 17:59:29,038 INFO L226 Difference]: Without dead ends: 139 [2022-11-25 17:59:29,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:59:29,044 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:29,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:59:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-25 17:59:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-11-25 17:59:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 127 states have internal predecessors, (134), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:59:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2022-11-25 17:59:29,116 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 5 [2022-11-25 17:59:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:29,116 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2022-11-25 17:59:29,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2022-11-25 17:59:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 17:59:29,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:29,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:59:29,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-25 17:59:29,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:29,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash 66867054, now seen corresponding path program 1 times [2022-11-25 17:59:29,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:29,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617367837] [2022-11-25 17:59:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:29,333 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 [2022-11-25 17:59:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:29,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:29,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:29,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:59:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:29,494 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 [2022-11-25 17:59:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:29,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:29,523 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617367837] [2022-11-25 17:59:29,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617367837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:29,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:29,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:59:29,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379654244] [2022-11-25 17:59:29,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:29,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:59:29,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:29,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:59:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:59:29,527 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:29,784 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-11-25 17:59:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:59:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 17:59:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:29,786 INFO L225 Difference]: With dead ends: 161 [2022-11-25 17:59:29,786 INFO L226 Difference]: Without dead ends: 161 [2022-11-25 17:59:29,786 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 [2022-11-25 17:59:29,787 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 87 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:29,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 141 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:59:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-25 17:59:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2022-11-25 17:59:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 72 states have (on average 1.8472222222222223) internal successors, (133), 126 states have internal predecessors, (133), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:59:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2022-11-25 17:59:29,796 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 5 [2022-11-25 17:59:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:29,797 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2022-11-25 17:59:29,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2022-11-25 17:59:29,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 17:59:29,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:29,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:59:29,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:30,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:30,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 66867055, now seen corresponding path program 1 times [2022-11-25 17:59:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:30,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613707281] [2022-11-25 17:59:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:30,011 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 [2022-11-25 17:59:30,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:30,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:30,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:59:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:30,109 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 [2022-11-25 17:59:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:30,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:30,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613707281] [2022-11-25 17:59:30,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613707281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:30,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:30,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:59:30,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854147398] [2022-11-25 17:59:30,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:30,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:59:30,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:30,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:59:30,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:59:30,139 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:30,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:30,470 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-11-25 17:59:30,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:59:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 17:59:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:30,472 INFO L225 Difference]: With dead ends: 160 [2022-11-25 17:59:30,472 INFO L226 Difference]: Without dead ends: 160 [2022-11-25 17:59:30,473 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 [2022-11-25 17:59:30,474 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:30,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 219 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:59:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-25 17:59:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 137. [2022-11-25 17:59:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 72 states have (on average 1.8333333333333333) internal successors, (132), 125 states have internal predecessors, (132), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:59:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2022-11-25 17:59:30,485 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 5 [2022-11-25 17:59:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:30,485 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2022-11-25 17:59:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:59:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2022-11-25 17:59:30,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:59:30,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:30,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:30,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:30,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash -828252735, now seen corresponding path program 1 times [2022-11-25 17:59:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743920928] [2022-11-25 17:59:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:30,700 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 [2022-11-25 17:59:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:30,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:30,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:59:30,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:30,943 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:59:30,943 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 [2022-11-25 17:59:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:31,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:31,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:31,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743920928] [2022-11-25 17:59:31,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743920928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:31,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:31,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:59:31,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008462007] [2022-11-25 17:59:31,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:31,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:59:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:59:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:59:31,024 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-25 17:59:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:31,603 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2022-11-25 17:59:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:59:31,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-11-25 17:59:31,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:31,605 INFO L225 Difference]: With dead ends: 173 [2022-11-25 17:59:31,605 INFO L226 Difference]: Without dead ends: 173 [2022-11-25 17:59:31,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:59:31,607 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 185 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:31,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 216 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:59:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-25 17:59:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 150. [2022-11-25 17:59:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 87 states have (on average 1.8160919540229885) internal successors, (158), 137 states have internal predecessors, (158), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:59:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2022-11-25 17:59:31,618 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 8 [2022-11-25 17:59:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:31,618 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2022-11-25 17:59:31,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-25 17:59:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2022-11-25 17:59:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 17:59:31,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:31,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:31,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:31,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:31,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:31,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash -828252734, now seen corresponding path program 1 times [2022-11-25 17:59:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597529793] [2022-11-25 17:59:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:31,832 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 [2022-11-25 17:59:31,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:31,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:31,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:31,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:59:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:32,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:59:32,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:59:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:32,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:32,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:32,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597529793] [2022-11-25 17:59:32,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597529793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:32,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:32,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:59:32,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384310407] [2022-11-25 17:59:32,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:32,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:59:32,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:59:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:59:32,141 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-25 17:59:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:32,809 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2022-11-25 17:59:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:59:32,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-11-25 17:59:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:32,811 INFO L225 Difference]: With dead ends: 152 [2022-11-25 17:59:32,812 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 17:59:32,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:59:32,813 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 183 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:32,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 148 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:59:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 17:59:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 140. [2022-11-25 17:59:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.7108433734939759) internal successors, (142), 127 states have internal predecessors, (142), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:59:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2022-11-25 17:59:32,833 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 8 [2022-11-25 17:59:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:32,833 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2022-11-25 17:59:32,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-25 17:59:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2022-11-25 17:59:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:59:32,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:32,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:32,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:33,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:33,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:33,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1381928766, now seen corresponding path program 1 times [2022-11-25 17:59:33,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:33,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198598422] [2022-11-25 17:59:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:33,051 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 [2022-11-25 17:59:33,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:33,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:33,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:59:33,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:33,279 INFO L321 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2022-11-25 17:59:33,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 17:59:33,348 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 14 treesize of output 16 [2022-11-25 17:59:33,431 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 [2022-11-25 17:59:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:33,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:33,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:33,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198598422] [2022-11-25 17:59:33,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198598422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:33,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:33,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:59:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394904152] [2022-11-25 17:59:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:33,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:59:33,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:59:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:59:33,493 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-25 17:59:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:34,215 INFO L93 Difference]: Finished difference Result 161 states and 177 transitions. [2022-11-25 17:59:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:59:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 10 [2022-11-25 17:59:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:34,219 INFO L225 Difference]: With dead ends: 161 [2022-11-25 17:59:34,219 INFO L226 Difference]: Without dead ends: 161 [2022-11-25 17:59:34,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:59:34,220 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 41 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:34,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 579 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:59:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-25 17:59:34,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2022-11-25 17:59:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 95 states have (on average 1.694736842105263) internal successors, (161), 140 states have internal predecessors, (161), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2022-11-25 17:59:34,238 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 10 [2022-11-25 17:59:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:34,238 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2022-11-25 17:59:34,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-25 17:59:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2022-11-25 17:59:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:59:34,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:34,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:34,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:34,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:34,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1381928765, now seen corresponding path program 1 times [2022-11-25 17:59:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:34,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757064568] [2022-11-25 17:59:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:34,441 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 [2022-11-25 17:59:34,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:34,443 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:34,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:34,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:59:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:34,676 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:59:34,676 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 [2022-11-25 17:59:34,690 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 [2022-11-25 17:59:34,787 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 14 treesize of output 16 [2022-11-25 17:59:34,796 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 14 treesize of output 16 [2022-11-25 17:59:34,946 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 [2022-11-25 17:59:34,952 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 [2022-11-25 17:59:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:35,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:35,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757064568] [2022-11-25 17:59:35,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757064568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:35,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:35,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:59:35,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494098153] [2022-11-25 17:59:35,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:35,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:59:35,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:59:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:59:35,013 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-25 17:59:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:36,444 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-11-25 17:59:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:59:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 10 [2022-11-25 17:59:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:36,446 INFO L225 Difference]: With dead ends: 160 [2022-11-25 17:59:36,446 INFO L226 Difference]: Without dead ends: 160 [2022-11-25 17:59:36,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:59:36,447 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 44 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:36,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 672 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 17:59:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-25 17:59:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-11-25 17:59:36,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 95 states have (on average 1.6842105263157894) internal successors, (160), 140 states have internal predecessors, (160), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:36,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 176 transitions. [2022-11-25 17:59:36,455 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 176 transitions. Word has length 10 [2022-11-25 17:59:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:36,455 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 176 transitions. [2022-11-25 17:59:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-11-25 17:59:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 176 transitions. [2022-11-25 17:59:36,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:59:36,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:36,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:36,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:36,669 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:36,669 INFO L85 PathProgramCache]: Analyzing trace with hash 109881212, now seen corresponding path program 1 times [2022-11-25 17:59:36,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:36,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785691737] [2022-11-25 17:59:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:36,670 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 [2022-11-25 17:59:36,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:36,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:36,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 17:59:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:59:36,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:36,790 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 [2022-11-25 17:59:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:36,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:36,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:36,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785691737] [2022-11-25 17:59:36,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785691737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:36,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:36,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:59:36,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971827731] [2022-11-25 17:59:36,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:36,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:59:36,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:36,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:59:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:59:36,838 INFO L87 Difference]: Start difference. First operand 154 states and 176 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-25 17:59:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:37,439 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2022-11-25 17:59:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:59:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2022-11-25 17:59:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:37,442 INFO L225 Difference]: With dead ends: 175 [2022-11-25 17:59:37,442 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 17:59:37,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:59:37,443 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 121 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:37,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 306 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:59:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 17:59:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2022-11-25 17:59:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.631578947368421) internal successors, (155), 139 states have internal predecessors, (155), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:37,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 171 transitions. [2022-11-25 17:59:37,450 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 171 transitions. Word has length 11 [2022-11-25 17:59:37,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:37,451 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 171 transitions. [2022-11-25 17:59:37,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-25 17:59:37,451 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 171 transitions. [2022-11-25 17:59:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:59:37,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:37,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:37,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:37,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 109881213, now seen corresponding path program 1 times [2022-11-25 17:59:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304716794] [2022-11-25 17:59:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:37,656 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 [2022-11-25 17:59:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:37,657 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:37,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:37,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:59:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:37,771 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 [2022-11-25 17:59:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:37,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:37,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:37,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304716794] [2022-11-25 17:59:37,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304716794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:37,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:37,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:59:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49543230] [2022-11-25 17:59:37,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:37,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:59:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:59:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:59:37,864 INFO L87 Difference]: Start difference. First operand 153 states and 171 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-25 17:59:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:38,469 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2022-11-25 17:59:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:59:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2022-11-25 17:59:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:38,471 INFO L225 Difference]: With dead ends: 175 [2022-11-25 17:59:38,471 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 17:59:38,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:59:38,472 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 57 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:38,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 433 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:59:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 17:59:38,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2022-11-25 17:59:38,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 95 states have (on average 1.5894736842105264) internal successors, (151), 139 states have internal predecessors, (151), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 167 transitions. [2022-11-25 17:59:38,479 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 167 transitions. Word has length 11 [2022-11-25 17:59:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:38,479 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 167 transitions. [2022-11-25 17:59:38,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-25 17:59:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 167 transitions. [2022-11-25 17:59:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:59:38,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:38,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:38,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:38,681 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_addErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:38,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1778337633, now seen corresponding path program 1 times [2022-11-25 17:59:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:38,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383753024] [2022-11-25 17:59:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:38,682 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 [2022-11-25 17:59:38,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:38,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:38,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 17:59:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:38,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:59:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:38,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:38,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:38,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383753024] [2022-11-25 17:59:38,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383753024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:38,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:38,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:59:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588126089] [2022-11-25 17:59:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:59:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:59:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:59:38,823 INFO L87 Difference]: Start difference. First operand 153 states and 167 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-25 17:59:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:39,061 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2022-11-25 17:59:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:59:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13 [2022-11-25 17:59:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:39,062 INFO L225 Difference]: With dead ends: 152 [2022-11-25 17:59:39,062 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 17:59:39,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:59:39,063 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 22 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 271 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:59:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 17:59:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-25 17:59:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.5578947368421052) internal successors, (148), 138 states have internal predecessors, (148), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2022-11-25 17:59:39,069 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 13 [2022-11-25 17:59:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:39,069 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2022-11-25 17:59:39,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-25 17:59:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2022-11-25 17:59:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:59:39,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:39,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:39,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:39,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:39,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_addErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:39,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1778337632, now seen corresponding path program 1 times [2022-11-25 17:59:39,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:39,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970845032] [2022-11-25 17:59:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:39,290 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:39,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:39,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:59:39,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:39,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:39,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970845032] [2022-11-25 17:59:39,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970845032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:39,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:39,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:59:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284738410] [2022-11-25 17:59:39,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:39,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:59:39,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:59:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:59:39,510 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-25 17:59:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:40,069 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2022-11-25 17:59:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:59:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 13 [2022-11-25 17:59:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:40,071 INFO L225 Difference]: With dead ends: 154 [2022-11-25 17:59:40,071 INFO L226 Difference]: Without dead ends: 154 [2022-11-25 17:59:40,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:59:40,071 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 165 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:40,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 521 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:59:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-25 17:59:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2022-11-25 17:59:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.5368421052631578) internal successors, (146), 138 states have internal predecessors, (146), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2022-11-25 17:59:40,077 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 13 [2022-11-25 17:59:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:40,077 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2022-11-25 17:59:40,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-11-25 17:59:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2022-11-25 17:59:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 17:59:40,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:40,078 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] [2022-11-25 17:59:40,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:40,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:40,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1358598366, now seen corresponding path program 1 times [2022-11-25 17:59:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:40,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861180353] [2022-11-25 17:59:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:40,295 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 [2022-11-25 17:59:40,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:40,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:40,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:40,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:59:40,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:40,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:40,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:40,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861180353] [2022-11-25 17:59:40,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861180353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:40,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:40,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:59:40,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171590459] [2022-11-25 17:59:40,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:40,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:59:40,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:59:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:59:40,507 INFO L87 Difference]: Start difference. First operand 152 states and 162 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-25 17:59:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:41,110 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2022-11-25 17:59:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:59:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 22 [2022-11-25 17:59:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:41,111 INFO L225 Difference]: With dead ends: 151 [2022-11-25 17:59:41,112 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 17:59:41,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:59:41,112 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 156 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:41,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 309 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:59:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 17:59:41,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-25 17:59:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.5263157894736843) internal successors, (145), 137 states have internal predecessors, (145), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 161 transitions. [2022-11-25 17:59:41,117 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 161 transitions. Word has length 22 [2022-11-25 17:59:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:41,118 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 161 transitions. [2022-11-25 17:59:41,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-25 17:59:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 161 transitions. [2022-11-25 17:59:41,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 17:59:41,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:41,124 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] [2022-11-25 17:59:41,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:41,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:41,325 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting list_emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1358598367, now seen corresponding path program 1 times [2022-11-25 17:59:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916896918] [2022-11-25 17:59:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:41,326 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 [2022-11-25 17:59:41,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:41,327 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:41,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:59:41,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:41,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:41,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:41,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916896918] [2022-11-25 17:59:41,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916896918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:41,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:41,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:59:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390194708] [2022-11-25 17:59:41,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:41,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:59:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:59:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:59:41,717 INFO L87 Difference]: Start difference. First operand 151 states and 161 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-25 17:59:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:42,630 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2022-11-25 17:59:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:59:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22 [2022-11-25 17:59:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:42,632 INFO L225 Difference]: With dead ends: 150 [2022-11-25 17:59:42,632 INFO L226 Difference]: Without dead ends: 150 [2022-11-25 17:59:42,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:59:42,633 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 250 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:42,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 316 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:59:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-25 17:59:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-25 17:59:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 136 states have internal predecessors, (144), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:59:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2022-11-25 17:59:42,639 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 22 [2022-11-25 17:59:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:42,639 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2022-11-25 17:59:42,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-25 17:59:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2022-11-25 17:59:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 17:59:42,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:42,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:42,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:42,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:42,841 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:42,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:42,842 INFO L85 PathProgramCache]: Analyzing trace with hash -868531821, now seen corresponding path program 1 times [2022-11-25 17:59:42,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:42,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569742706] [2022-11-25 17:59:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:42,842 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 [2022-11-25 17:59:42,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:42,844 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:42,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:59:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:43,163 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 17:59:43,164 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 12 treesize of output 22 [2022-11-25 17:59:43,446 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 11 treesize of output 7 [2022-11-25 17:59:43,645 INFO L321 Elim1Store]: treesize reduction 116, result has 26.6 percent of original size [2022-11-25 17:59:43,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 73 [2022-11-25 17:59:43,792 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 42 treesize of output 40 [2022-11-25 17:59:44,350 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 92 treesize of output 68 [2022-11-25 17:59:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:44,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:44,890 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_345) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-25 17:59:45,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:59:45,590 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-25 17:59:45,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:59:45,602 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 15 [2022-11-25 17:59:45,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 17:59:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569742706] [2022-11-25 17:59:45,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569742706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:45,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945645872] [2022-11-25 17:59:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:45,683 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 17:59:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 [2022-11-25 17:59:45,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 17:59:45,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-25 17:59:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:46,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 17:59:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:46,208 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 17:59:46,208 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 [2022-11-25 17:59:46,782 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 11 treesize of output 7 [2022-11-25 17:59:47,093 INFO L321 Elim1Store]: treesize reduction 106, result has 28.4 percent of original size [2022-11-25 17:59:47,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 67 [2022-11-25 17:59:47,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-25 17:59:47,473 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 11 [2022-11-25 17:59:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:59:47,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:59:50,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:59:50,252 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-25 17:59:50,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:59:50,259 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 15 [2022-11-25 17:59:52,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945645872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:52,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:59:52,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2022-11-25 17:59:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551520834] [2022-11-25 17:59:52,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:59:52,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:59:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 17:59:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:59:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1224, Unknown=30, NotChecked=72, Total=1482 [2022-11-25 17:59:52,345 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:59:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:59:58,595 INFO L93 Difference]: Finished difference Result 233 states and 247 transitions. [2022-11-25 17:59:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 17:59:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-25 17:59:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:59:58,597 INFO L225 Difference]: With dead ends: 233 [2022-11-25 17:59:58,597 INFO L226 Difference]: Without dead ends: 233 [2022-11-25 17:59:58,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=471, Invalid=2473, Unknown=30, NotChecked=106, Total=3080 [2022-11-25 17:59:58,599 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 956 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:59:58,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 1108 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-25 17:59:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-25 17:59:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 157. [2022-11-25 17:59:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.48) internal successors, (148), 142 states have internal predecessors, (148), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:59:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 166 transitions. [2022-11-25 17:59:58,607 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 166 transitions. Word has length 26 [2022-11-25 17:59:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:59:58,608 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 166 transitions. [2022-11-25 17:59:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 24 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:59:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 166 transitions. [2022-11-25 17:59:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 17:59:58,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:59:58,609 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:58,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-25 17:59:58,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:59,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 17:59:59,014 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 17:59:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash -868531820, now seen corresponding path program 1 times [2022-11-25 17:59:59,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 17:59:59,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789871598] [2022-11-25 17:59:59,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:59,015 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 [2022-11-25 17:59:59,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 17:59:59,016 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 17:59:59,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 17:59:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:59,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 17:59:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:59,308 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 [2022-11-25 17:59:59,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 17:59:59,710 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 11 treesize of output 7 [2022-11-25 17:59:59,727 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 11 treesize of output 7 [2022-11-25 17:59:59,984 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 17:59:59,985 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 16 treesize of output 26 [2022-11-25 18:00:00,028 INFO L321 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-11-25 18:00:00,028 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 24 treesize of output 26 [2022-11-25 18:00:00,107 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 24 treesize of output 24 [2022-11-25 18:00:00,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:00:00,267 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 [2022-11-25 18:00:00,274 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 17 treesize of output 9 [2022-11-25 18:00:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:00,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:00,913 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_479) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_479 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_479) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_478) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) is different from false [2022-11-25 18:00:02,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:02,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2022-11-25 18:00:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:00:02,135 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 26 treesize of output 14 [2022-11-25 18:00:02,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:02,160 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-25 18:00:02,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:00:02,180 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 40 treesize of output 32 [2022-11-25 18:00:02,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:02,193 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-25 18:00:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:00:02,198 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 25 treesize of output 17 [2022-11-25 18:00:02,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:02,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789871598] [2022-11-25 18:00:02,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789871598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:02,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347898837] [2022-11-25 18:00:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:02,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 18:00:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 [2022-11-25 18:00:02,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 18:00:02,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-25 18:00:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 18:00:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:03,106 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 [2022-11-25 18:00:03,118 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 [2022-11-25 18:00:04,054 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 11 treesize of output 7 [2022-11-25 18:00:04,066 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 11 treesize of output 7 [2022-11-25 18:00:04,537 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-25 18:00:04,537 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 16 treesize of output 26 [2022-11-25 18:00:04,590 INFO L321 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-11-25 18:00:04,591 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 24 treesize of output 26 [2022-11-25 18:00:04,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:00:04,744 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 24 treesize of output 24 [2022-11-25 18:00:05,058 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 [2022-11-25 18:00:05,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-25 18:00:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:05,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:05,163 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_552) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) is different from false [2022-11-25 18:00:05,257 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_19| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19|) (_ bv0 1))) (forall ((v_ArrVal_552 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_550 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select (store |c_#length| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_550) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_552) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))))) (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_19| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19|) (_ bv0 1))) (forall ((v_ArrVal_551 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_551) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))))) is different from false [2022-11-25 18:00:05,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:05,932 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2022-11-25 18:00:05,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:00:05,938 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 26 treesize of output 14 [2022-11-25 18:00:05,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:05,959 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-25 18:00:05,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:00:05,972 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 40 treesize of output 32 [2022-11-25 18:00:05,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:00:05,987 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-25 18:00:05,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:00:06,000 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 25 treesize of output 17 [2022-11-25 18:00:06,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347898837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:06,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:00:06,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-25 18:00:06,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45725370] [2022-11-25 18:00:06,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:06,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:00:06,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:00:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1060, Unknown=3, NotChecked=204, Total=1406 [2022-11-25 18:00:06,256 INFO L87 Difference]: Start difference. First operand 157 states and 166 transitions. Second operand has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:00:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:00:12,399 INFO L93 Difference]: Finished difference Result 217 states and 231 transitions. [2022-11-25 18:00:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:00:12,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-25 18:00:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:00:12,401 INFO L225 Difference]: With dead ends: 217 [2022-11-25 18:00:12,401 INFO L226 Difference]: Without dead ends: 217 [2022-11-25 18:00:12,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=371, Invalid=1800, Unknown=3, NotChecked=276, Total=2450 [2022-11-25 18:00:12,403 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 597 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-25 18:00:12,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 650 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-25 18:00:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-25 18:00:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 143. [2022-11-25 18:00:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.5340909090909092) internal successors, (135), 129 states have internal predecessors, (135), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:00:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2022-11-25 18:00:12,410 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 26 [2022-11-25 18:00:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:00:12,410 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2022-11-25 18:00:12,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:00:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2022-11-25 18:00:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 18:00:12,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:00:12,412 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, 1] [2022-11-25 18:00:12,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:12,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:00:12,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:00:12,816 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:00:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash -414351977, now seen corresponding path program 1 times [2022-11-25 18:00:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:12,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967119167] [2022-11-25 18:00:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:12,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:00:12,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:12,819 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 18:00:12,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:00:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:12,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:00:12,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:13,155 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 11 treesize of output 7 [2022-11-25 18:00:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:13,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:13,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967119167] [2022-11-25 18:00:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967119167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:13,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:00:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582952333] [2022-11-25 18:00:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:13,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:00:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:00:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:00:13,490 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:00:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:00:14,681 INFO L93 Difference]: Finished difference Result 188 states and 201 transitions. [2022-11-25 18:00:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:00:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-11-25 18:00:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:00:14,682 INFO L225 Difference]: With dead ends: 188 [2022-11-25 18:00:14,683 INFO L226 Difference]: Without dead ends: 188 [2022-11-25 18:00:14,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:00:14,683 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 339 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:00:14,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 651 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 18:00:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-25 18:00:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 141. [2022-11-25 18:00:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 86 states have (on average 1.5348837209302326) internal successors, (132), 127 states have internal predecessors, (132), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:00:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 148 transitions. [2022-11-25 18:00:14,689 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 148 transitions. Word has length 31 [2022-11-25 18:00:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:00:14,689 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 148 transitions. [2022-11-25 18:00:14,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:00:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 148 transitions. [2022-11-25 18:00:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 18:00:14,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:00:14,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:14,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:00:14,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:00:14,911 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:00:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1582571725, now seen corresponding path program 1 times [2022-11-25 18:00:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:14,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976925965] [2022-11-25 18:00:14,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:14,912 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 [2022-11-25 18:00:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:14,913 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 18:00:14,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 18:00:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 18:00:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:15,292 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 11 treesize of output 7 [2022-11-25 18:00:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:00:15,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:15,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:15,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976925965] [2022-11-25 18:00:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976925965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:15,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:15,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:00:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827518634] [2022-11-25 18:00:15,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:00:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:00:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:00:15,695 INFO L87 Difference]: Start difference. First operand 141 states and 148 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:00:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:00:16,996 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2022-11-25 18:00:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:00:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-25 18:00:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:00:16,998 INFO L225 Difference]: With dead ends: 188 [2022-11-25 18:00:16,998 INFO L226 Difference]: Without dead ends: 188 [2022-11-25 18:00:16,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:00:16,999 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 220 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:00:16,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 720 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 18:00:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-25 18:00:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 142. [2022-11-25 18:00:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.528735632183908) internal successors, (133), 127 states have internal predecessors, (133), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:00:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-11-25 18:00:17,005 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 37 [2022-11-25 18:00:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:00:17,005 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-11-25 18:00:17,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:00:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-11-25 18:00:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 18:00:17,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:00:17,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:17,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:17,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:00:17,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:00:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash 456962673, now seen corresponding path program 1 times [2022-11-25 18:00:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:17,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720903009] [2022-11-25 18:00:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:17,216 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 [2022-11-25 18:00:17,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:17,217 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 18:00:17,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:00:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:00:17,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:17,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 18:00:17,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:00:17,765 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-25 18:00:17,766 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 23 treesize of output 35 [2022-11-25 18:00:17,805 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 11 [2022-11-25 18:00:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:00:17,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:17,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:17,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720903009] [2022-11-25 18:00:17,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720903009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:17,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:17,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 18:00:17,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116315596] [2022-11-25 18:00:17,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:17,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:00:17,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:00:17,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:00:17,932 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:00:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:00:20,325 INFO L93 Difference]: Finished difference Result 290 states and 312 transitions. [2022-11-25 18:00:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:00:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-25 18:00:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:00:20,327 INFO L225 Difference]: With dead ends: 290 [2022-11-25 18:00:20,327 INFO L226 Difference]: Without dead ends: 290 [2022-11-25 18:00:20,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:00:20,328 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 410 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:00:20,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 511 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 18:00:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-25 18:00:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 164. [2022-11-25 18:00:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 105 states have (on average 1.5142857142857142) internal successors, (159), 145 states have internal predecessors, (159), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 18:00:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2022-11-25 18:00:20,335 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 39 [2022-11-25 18:00:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:00:20,335 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2022-11-25 18:00:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 18:00:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2022-11-25 18:00:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 18:00:20,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:00:20,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:00:20,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Ended with exit code 0 [2022-11-25 18:00:20,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:00:20,549 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:00:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:20,549 INFO L85 PathProgramCache]: Analyzing trace with hash 456962674, now seen corresponding path program 1 times [2022-11-25 18:00:20,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:20,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586921741] [2022-11-25 18:00:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:20,550 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 [2022-11-25 18:00:20,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:20,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 18:00:20,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:00:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:20,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-25 18:00:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:20,832 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 [2022-11-25 18:00:20,839 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 [2022-11-25 18:00:21,132 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 11 treesize of output 7 [2022-11-25 18:00:21,148 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 11 treesize of output 7 [2022-11-25 18:00:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:21,406 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 16 treesize of output 18 [2022-11-25 18:00:21,422 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-25 18:00:21,422 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 17 treesize of output 17 [2022-11-25 18:00:21,519 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 [2022-11-25 18:00:21,527 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 17 treesize of output 9 [2022-11-25 18:00:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:28,484 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:00:28,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586921741] [2022-11-25 18:00:28,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586921741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:28,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130430843] [2022-11-25 18:00:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 18:00:28,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 [2022-11-25 18:00:28,515 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 18:00:28,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-25 18:00:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 18:00:28,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:28,979 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 9 treesize of output 3 [2022-11-25 18:00:29,056 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 [2022-11-25 18:00:29,768 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 11 treesize of output 7 [2022-11-25 18:00:29,780 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 11 treesize of output 7 [2022-11-25 18:00:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:30,376 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 16 treesize of output 18 [2022-11-25 18:00:30,851 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-25 18:00:30,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-11-25 18:00:30,869 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 [2022-11-25 18:00:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:31,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:31,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130430843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:00:31,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:00:31,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2022-11-25 18:00:31,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086040039] [2022-11-25 18:00:31,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:31,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 18:00:31,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:31,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 18:00:31,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-11-25 18:00:31,853 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 18:00:37,403 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] [2022-11-25 18:00:39,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:00:46,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:00:53,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:00:59,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:01,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:03,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:04,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:08,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:01:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:01:14,102 INFO L93 Difference]: Finished difference Result 260 states and 276 transitions. [2022-11-25 18:01:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 18:01:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-11-25 18:01:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:01:14,104 INFO L225 Difference]: With dead ends: 260 [2022-11-25 18:01:14,104 INFO L226 Difference]: Without dead ends: 260 [2022-11-25 18:01:14,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=329, Invalid=1921, Unknown=6, NotChecked=0, Total=2256 [2022-11-25 18:01:14,106 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1077 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 128 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:01:14,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 758 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1719 Invalid, 7 Unknown, 0 Unchecked, 26.1s Time] [2022-11-25 18:01:14,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-25 18:01:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2022-11-25 18:01:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 149 states have internal predecessors, (161), 10 states have call successors, (10), 9 states have call predecessors, (10), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 18:01:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 181 transitions. [2022-11-25 18:01:14,112 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 181 transitions. Word has length 39 [2022-11-25 18:01:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:01:14,113 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 181 transitions. [2022-11-25 18:01:14,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 18:01:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 181 transitions. [2022-11-25 18:01:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 18:01:14,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:01:14,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:01:14,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:14,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:01:14,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:01:14,518 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-25 18:01:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash 770302443, now seen corresponding path program 1 times [2022-11-25 18:01:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346615656] [2022-11-25 18:01:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:14,519 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 [2022-11-25 18:01:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:14,520 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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) [2022-11-25 18:01:14,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e381a2a8-5737-45d7-b726-154ae39aafe6/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:01:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:14,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 18:01:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:14,942 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:01:14,943 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 [2022-11-25 18:01:14,981 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 14 treesize of output 16 [2022-11-25 18:01:14,994 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 7 treesize of output 3 [2022-11-25 18:01:15,201 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 15 treesize of output 11 [2022-11-25 18:01:15,278 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 [2022-11-25 18:01:15,371 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-25 18:01:15,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2022-11-25 18:01:15,381 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 11 treesize of output 7 [2022-11-25 18:01:15,540 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 43 treesize of output 35 [2022-11-25 18:01:16,055 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 15 [2022-11-25 18:01:16,446 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 18:01:16,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-11-25 18:01:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:01:16,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:17,117 INFO L321 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2022-11-25 18:01:17,117 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 28 treesize of output 27 [2022-11-25 18:01:17,327 INFO L321 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2022-11-25 18:01:17,327 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 28 treesize of output 27 [2022-11-25 18:01:19,273 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 76 treesize of output 72 [2022-11-25 18:01:28,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:01:28,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:01:28,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2827 treesize of output 2728