./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0102-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:08:40,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:08:40,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:08:40,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:08:40,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:08:40,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:08:40,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:08:40,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:08:40,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:08:40,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:08:40,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:08:40,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:08:40,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:08:40,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:08:40,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:08:40,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:08:40,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:08:40,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:08:40,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:08:40,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:08:40,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:08:40,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:08:40,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:08:40,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:08:40,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:08:40,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:08:40,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:08:40,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:08:40,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:08:40,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:08:40,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:08:40,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:08:40,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:08:40,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:08:40,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:08:40,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:08:40,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:08:40,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:08:40,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:08:40,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:08:40,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:08:40,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:08:40,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:08:40,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:08:40,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:08:40,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:08:40,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:08:40,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:08:40,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:08:40,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:08:40,260 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:08:40,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:08:40,261 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:08:40,261 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:08:40,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:08:40,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:08:40,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:08:40,262 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:08:40,262 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:08:40,262 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:08:40,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:08:40,262 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:08:40,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:08:40,263 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:08:40,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:08:40,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:08:40,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:08:40,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:08:40,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:08:40,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:08:40,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:08:40,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:08:40,265 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:08:40,265 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:08:40,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:08:40,265 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_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2022-11-23 03:08:40,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:08:40,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:08:40,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:08:40,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:08:40,592 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:08:40,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/memsafety/test-0102-2.i [2022-11-23 03:08:43,744 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:08:44,089 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:08:44,090 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/sv-benchmarks/c/memsafety/test-0102-2.i [2022-11-23 03:08:44,109 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data/5b27959ce/b15d5f7f38ed4b8ab4c602b91bd50fb5/FLAG496374c1d [2022-11-23 03:08:44,131 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data/5b27959ce/b15d5f7f38ed4b8ab4c602b91bd50fb5 [2022-11-23 03:08:44,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:08:44,139 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:08:44,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:08:44,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:08:44,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:08:44,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:44" (1/1) ... [2022-11-23 03:08:44,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472a9e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:44, skipping insertion in model container [2022-11-23 03:08:44,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:44" (1/1) ... [2022-11-23 03:08:44,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:08:44,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:08:44,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:08:44,668 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 03:08:44,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b78e9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:44, skipping insertion in model container [2022-11-23 03:08:44,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:08:44,669 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 03:08:44,671 INFO L158 Benchmark]: Toolchain (without parser) took 531.26ms. Allocated memory is still 155.2MB. Free memory was 123.0MB in the beginning and 111.2MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 03:08:44,672 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 107.0MB. Free memory was 56.9MB in the beginning and 56.7MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 03:08:44,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 526.60ms. Allocated memory is still 155.2MB. Free memory was 123.0MB in the beginning and 111.2MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 03:08:44,675 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 107.0MB. Free memory was 56.9MB in the beginning and 56.7MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 526.60ms. Allocated memory is still 155.2MB. Free memory was 123.0MB in the beginning and 111.2MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:08:47,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:08:47,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:08:47,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:08:47,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:08:47,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:08:47,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:08:47,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:08:47,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:08:47,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:08:47,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:08:47,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:08:47,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:08:47,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:08:47,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:08:47,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:08:47,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:08:47,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:08:47,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:08:47,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:08:47,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:08:47,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:08:47,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:08:47,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:08:47,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:08:47,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:08:47,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:08:47,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:08:47,273 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:08:47,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:08:47,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:08:47,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:08:47,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:08:47,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:08:47,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:08:47,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:08:47,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:08:47,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:08:47,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:08:47,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:08:47,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:08:47,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 03:08:47,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:08:47,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:08:47,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:08:47,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:08:47,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:08:47,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:08:47,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:08:47,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:08:47,337 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:08:47,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:08:47,338 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:08:47,338 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:08:47,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:08:47,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:08:47,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:08:47,339 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:08:47,340 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:08:47,340 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:08:47,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:08:47,340 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:08:47,341 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 03:08:47,341 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 03:08:47,341 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:08:47,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:08:47,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:08:47,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:08:47,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:08:47,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:08:47,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:08:47,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:08:47,343 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 03:08:47,343 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 03:08:47,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:08:47,344 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:08:47,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:08:47,344 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 03:08:47,345 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_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2022-11-23 03:08:47,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:08:47,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:08:47,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:08:47,815 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:08:47,816 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:08:47,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/memsafety/test-0102-2.i [2022-11-23 03:08:50,936 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:08:51,264 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:08:51,264 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/sv-benchmarks/c/memsafety/test-0102-2.i [2022-11-23 03:08:51,287 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data/a5e542833/1526690503e54ae0928be9db44f02fd3/FLAG7b72f7404 [2022-11-23 03:08:51,305 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/data/a5e542833/1526690503e54ae0928be9db44f02fd3 [2022-11-23 03:08:51,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:08:51,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:08:51,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:08:51,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:08:51,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:08:51,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:51,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c47e85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51, skipping insertion in model container [2022-11-23 03:08:51,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:51,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:08:51,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:08:51,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:08:51,754 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 03:08:51,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:08:51,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:08:51,855 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:08:51,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:08:51,951 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:08:51,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51 WrapperNode [2022-11-23 03:08:51,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:08:51,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:08:51,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:08:51,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:08:51,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:51,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,003 INFO L138 Inliner]: procedures = 136, calls = 37, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 101 [2022-11-23 03:08:52,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:08:52,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:08:52,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:08:52,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:08:52,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:08:52,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:08:52,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:08:52,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:08:52,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (1/1) ... [2022-11-23 03:08:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:08:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:08:52,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:08:52,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:08:52,148 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-23 03:08:52,148 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-23 03:08:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:08:52,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:08:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2022-11-23 03:08:52,151 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2022-11-23 03:08:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:08:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 03:08:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 03:08:52,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 03:08:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:08:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 03:08:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 03:08:52,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:08:52,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:08:52,309 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:08:52,311 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:08:52,885 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:08:52,892 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:08:52,892 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:08:52,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:52 BoogieIcfgContainer [2022-11-23 03:08:52,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:08:52,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:08:52,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:08:52,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:08:52,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:08:51" (1/3) ... [2022-11-23 03:08:52,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d50c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:52, skipping insertion in model container [2022-11-23 03:08:52,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:51" (2/3) ... [2022-11-23 03:08:52,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d50c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:52, skipping insertion in model container [2022-11-23 03:08:52,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:52" (3/3) ... [2022-11-23 03:08:52,913 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0102-2.i [2022-11-23 03:08:52,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:08:52,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2022-11-23 03:08:52,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:08:52,983 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;@523b7e2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:08:52,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-23 03:08:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 76 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 03:08:52,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:52,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 03:08:52,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 60205689, now seen corresponding path program 1 times [2022-11-23 03:08:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964760120] [2022-11-23 03:08:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:53,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:53,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:53,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 03:08:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:53,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 03:08:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:53,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:53,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964760120] [2022-11-23 03:08:53,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964760120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:53,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:53,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:08:53,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211501681] [2022-11-23 03:08:53,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:53,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:08:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:08:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:08:53,185 INFO L87 Difference]: Start difference. First operand has 83 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 76 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-11-23 03:08:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:53,209 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-23 03:08:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:08:53,211 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 [2022-11-23 03:08:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:53,219 INFO L225 Difference]: With dead ends: 83 [2022-11-23 03:08:53,219 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 03:08:53,221 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 [2022-11-23 03:08:53,225 INFO L413 NwaCegarLoop]: 88 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, 88 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 [2022-11-23 03:08:53,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:08:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 03:08:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-23 03:08:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 74 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-11-23 03:08:53,268 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 5 [2022-11-23 03:08:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:53,269 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-11-23 03:08:53,269 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) [2022-11-23 03:08:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-11-23 03:08:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 03:08:53,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:53,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:53,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:53,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:53,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2005144647, now seen corresponding path program 1 times [2022-11-23 03:08:53,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340349922] [2022-11-23 03:08:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:53,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:53,490 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:53,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 03:08:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:08:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:53,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:08:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:53,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:53,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340349922] [2022-11-23 03:08:53,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340349922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:53,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:53,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:08:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833367620] [2022-11-23 03:08:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:53,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:08:53,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:08:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:08:53,766 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:54,203 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-11-23 03:08:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:08:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-23 03:08:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:54,207 INFO L225 Difference]: With dead ends: 108 [2022-11-23 03:08:54,208 INFO L226 Difference]: Without dead ends: 108 [2022-11-23 03:08:54,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:08:54,211 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:54,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 162 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:08:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-23 03:08:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2022-11-23 03:08:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:54,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-11-23 03:08:54,235 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 7 [2022-11-23 03:08:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:54,235 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-11-23 03:08:54,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-11-23 03:08:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 03:08:54,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:54,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:54,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:54,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:54,451 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2005144648, now seen corresponding path program 1 times [2022-11-23 03:08:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575975803] [2022-11-23 03:08:54,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:54,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:54,454 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:54,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 03:08:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:08:54,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:54,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:08:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:54,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:54,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575975803] [2022-11-23 03:08:54,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575975803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:54,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:54,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:08:54,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906531418] [2022-11-23 03:08:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:08:54,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:08:54,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:08:54,669 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:54,989 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-23 03:08:54,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:08:54,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2022-11-23 03:08:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:54,991 INFO L225 Difference]: With dead ends: 83 [2022-11-23 03:08:54,991 INFO L226 Difference]: Without dead ends: 83 [2022-11-23 03:08:54,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:08:54,992 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 5 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:54,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:08:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-23 03:08:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-11-23 03:08:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 74 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-23 03:08:55,011 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 7 [2022-11-23 03:08:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:55,011 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-23 03:08:55,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:55,012 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-23 03:08:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 03:08:55,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:55,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:55,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:55,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 859208239, now seen corresponding path program 1 times [2022-11-23 03:08:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:55,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382102026] [2022-11-23 03:08:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:55,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:55,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:55,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:55,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 03:08:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:55,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:08:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:55,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:08:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:55,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:55,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:55,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382102026] [2022-11-23 03:08:55,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382102026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:55,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:55,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:08:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796781973] [2022-11-23 03:08:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:08:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:08:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:08:55,351 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-23 03:08:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:55,485 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-11-23 03:08:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:08:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2022-11-23 03:08:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:55,487 INFO L225 Difference]: With dead ends: 82 [2022-11-23 03:08:55,487 INFO L226 Difference]: Without dead ends: 82 [2022-11-23 03:08:55,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:08:55,489 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:55,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:08:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-23 03:08:55,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-11-23 03:08:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 73 states have internal predecessors, (78), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2022-11-23 03:08:55,496 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 11 [2022-11-23 03:08:55,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:55,497 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2022-11-23 03:08:55,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-23 03:08:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2022-11-23 03:08:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 03:08:55,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:55,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:55,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:55,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting create_sub_listErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash 859208240, now seen corresponding path program 1 times [2022-11-23 03:08:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278709254] [2022-11-23 03:08:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:55,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:55,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:55,720 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:55,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 03:08:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:08:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:55,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:08:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:55,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:55,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:55,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278709254] [2022-11-23 03:08:55,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278709254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:55,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:55,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:08:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028659224] [2022-11-23 03:08:55,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:55,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:08:55,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:08:55,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:08:55,866 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-23 03:08:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:56,018 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-23 03:08:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:08:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2022-11-23 03:08:56,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:56,020 INFO L225 Difference]: With dead ends: 81 [2022-11-23 03:08:56,020 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 03:08:56,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:08:56,021 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:56,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:08:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 03:08:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-11-23 03:08:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-11-23 03:08:56,026 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 11 [2022-11-23 03:08:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:56,030 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-11-23 03:08:56,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2022-11-23 03:08:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-11-23 03:08:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 03:08:56,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:56,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:56,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:56,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:56,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1332328513, now seen corresponding path program 1 times [2022-11-23 03:08:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518284817] [2022-11-23 03:08:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:56,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:56,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:56,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 03:08:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:08:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:56,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:08:56,468 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:08:56,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:08:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:56,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:56,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:56,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518284817] [2022-11-23 03:08:56,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518284817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:56,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:56,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 03:08:56,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969157813] [2022-11-23 03:08:56,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:56,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:08:56,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:08:56,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:08:56,548 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:57,102 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2022-11-23 03:08:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:08:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 03:08:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:57,104 INFO L225 Difference]: With dead ends: 129 [2022-11-23 03:08:57,105 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 03:08:57,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:08:57,106 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 108 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:57,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 235 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 03:08:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 03:08:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2022-11-23 03:08:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 81 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:08:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 103 transitions. [2022-11-23 03:08:57,114 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 103 transitions. Word has length 14 [2022-11-23 03:08:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:57,114 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 103 transitions. [2022-11-23 03:08:57,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 103 transitions. [2022-11-23 03:08:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 03:08:57,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:57,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:57,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-23 03:08:57,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:57,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1332328512, now seen corresponding path program 1 times [2022-11-23 03:08:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:57,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7283502] [2022-11-23 03:08:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:57,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:57,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:57,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:57,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 03:08:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:57,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 03:08:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:57,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:08:57,494 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 [2022-11-23 03:08:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:08:57,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:08:57,672 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:08:57,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:08:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:57,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:57,761 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:57,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7283502] [2022-11-23 03:08:57,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7283502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:57,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:57,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 03:08:57,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242445292] [2022-11-23 03:08:57,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:57,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:08:57,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:57,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:08:57,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:08:57,766 INFO L87 Difference]: Start difference. First operand 90 states and 103 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:58,472 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-11-23 03:08:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:08:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 03:08:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:58,474 INFO L225 Difference]: With dead ends: 117 [2022-11-23 03:08:58,474 INFO L226 Difference]: Without dead ends: 117 [2022-11-23 03:08:58,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:08:58,475 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:58,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 298 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 03:08:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-23 03:08:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2022-11-23 03:08:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.676056338028169) internal successors, (119), 97 states have internal predecessors, (119), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 03:08:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-11-23 03:08:58,482 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 14 [2022-11-23 03:08:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:58,482 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-11-23 03:08:58,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-11-23 03:08:58,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 03:08:58,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:58,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:58,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:58,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:58,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:58,708 INFO L85 PathProgramCache]: Analyzing trace with hash -467443808, now seen corresponding path program 1 times [2022-11-23 03:08:58,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:58,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270801985] [2022-11-23 03:08:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:58,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:58,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:58,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:58,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 03:08:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:08:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:58,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:58,903 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:58,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270801985] [2022-11-23 03:08:58,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270801985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:58,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:58,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:08:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572134786] [2022-11-23 03:08:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:58,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:08:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:08:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:08:58,905 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:08:59,057 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-11-23 03:08:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:08:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 03:08:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:08:59,059 INFO L225 Difference]: With dead ends: 107 [2022-11-23 03:08:59,059 INFO L226 Difference]: Without dead ends: 107 [2022-11-23 03:08:59,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:08:59,060 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 27 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:08:59,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 154 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:08:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-23 03:08:59,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-23 03:08:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.6338028169014085) internal successors, (116), 96 states have internal predecessors, (116), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 03:08:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2022-11-23 03:08:59,068 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 16 [2022-11-23 03:08:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:08:59,069 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2022-11-23 03:08:59,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:08:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2022-11-23 03:08:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 03:08:59,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:08:59,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:59,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:59,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:08:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash -467443807, now seen corresponding path program 1 times [2022-11-23 03:08:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:08:59,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937211731] [2022-11-23 03:08:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:59,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:08:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:08:59,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:08:59,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 03:08:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:59,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 03:08:59,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:59,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:08:59,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:08:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937211731] [2022-11-23 03:08:59,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937211731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:08:59,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:08:59,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:08:59,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707111774] [2022-11-23 03:08:59,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:08:59,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:08:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:08:59,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:08:59,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:08:59,563 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:00,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:00,024 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-11-23 03:09:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 03:09:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 03:09:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:00,027 INFO L225 Difference]: With dead ends: 115 [2022-11-23 03:09:00,028 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 03:09:00,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:09:00,028 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 114 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:00,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 456 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:09:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 03:09:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2022-11-23 03:09:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.619718309859155) internal successors, (115), 96 states have internal predecessors, (115), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 03:09:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2022-11-23 03:09:00,034 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 16 [2022-11-23 03:09:00,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:00,034 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2022-11-23 03:09:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2022-11-23 03:09:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 03:09:00,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:00,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:09:00,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:00,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:00,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1605856063, now seen corresponding path program 1 times [2022-11-23 03:09:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:00,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959269993] [2022-11-23 03:09:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:00,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:00,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:00,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:00,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 03:09:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:09:00,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:00,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:00,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:09:00,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:00,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959269993] [2022-11-23 03:09:00,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959269993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:09:00,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:09:00,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:09:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568144166] [2022-11-23 03:09:00,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:09:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:09:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:09:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:09:00,494 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:00,851 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2022-11-23 03:09:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:09:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 03:09:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:00,853 INFO L225 Difference]: With dead ends: 114 [2022-11-23 03:09:00,853 INFO L226 Difference]: Without dead ends: 114 [2022-11-23 03:09:00,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:09:00,853 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 49 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:00,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 226 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:09:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-23 03:09:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-11-23 03:09:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 95 states have internal predecessors, (110), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 03:09:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2022-11-23 03:09:00,857 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 17 [2022-11-23 03:09:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:00,858 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2022-11-23 03:09:00,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2022-11-23 03:09:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 03:09:00,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:00,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:09:00,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:01,076 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1605856062, now seen corresponding path program 1 times [2022-11-23 03:09:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:01,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002562260] [2022-11-23 03:09:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:01,077 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 03:09:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:09:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:01,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:09:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:01,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:09:01,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:01,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002562260] [2022-11-23 03:09:01,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002562260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:09:01,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:09:01,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:09:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329736643] [2022-11-23 03:09:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:09:01,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:09:01,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:09:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:09:01,325 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:01,734 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-11-23 03:09:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:09:01,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 03:09:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:01,740 INFO L225 Difference]: With dead ends: 112 [2022-11-23 03:09:01,740 INFO L226 Difference]: Without dead ends: 112 [2022-11-23 03:09:01,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:09:01,741 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 36 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:01,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 246 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:09:01,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-23 03:09:01,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-11-23 03:09:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 95 states have internal predecessors, (106), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 03:09:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2022-11-23 03:09:01,746 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 17 [2022-11-23 03:09:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:01,747 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2022-11-23 03:09:01,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2022-11-23 03:09:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 03:09:01,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:01,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:09:01,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:01,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:01,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:01,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:01,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414076, now seen corresponding path program 1 times [2022-11-23 03:09:01,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:01,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614501333] [2022-11-23 03:09:01,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:01,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:01,965 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:01,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 03:09:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 03:09:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:02,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:02,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:02,284 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 21 treesize of output 20 [2022-11-23 03:09:02,313 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:09:02,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:09:02,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:09:02,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 03:09:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:02,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:09:02,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614501333] [2022-11-23 03:09:02,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614501333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:09:02,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:09:02,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 03:09:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594533998] [2022-11-23 03:09:02,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:09:02,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:09:02,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:09:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:09:02,504 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:03,611 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2022-11-23 03:09:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:09:03,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 03:09:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:03,618 INFO L225 Difference]: With dead ends: 162 [2022-11-23 03:09:03,618 INFO L226 Difference]: Without dead ends: 162 [2022-11-23 03:09:03,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:09:03,620 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:03,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 356 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 03:09:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-23 03:09:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2022-11-23 03:09:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.4285714285714286) internal successors, (130), 115 states have internal predecessors, (130), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 03:09:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2022-11-23 03:09:03,628 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 19 [2022-11-23 03:09:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:03,628 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2022-11-23 03:09:03,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2022-11-23 03:09:03,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 03:09:03,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:03,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:09:03,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-23 03:09:03,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:03,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:03,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1334414075, now seen corresponding path program 1 times [2022-11-23 03:09:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157871479] [2022-11-23 03:09:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:03,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:03,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:03,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:03,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 03:09:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 03:09:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:04,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:04,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:09:04,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:04,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:04,256 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 21 treesize of output 20 [2022-11-23 03:09:04,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:04,274 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 21 treesize of output 20 [2022-11-23 03:09:04,308 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:09:04,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:09:04,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:09:04,395 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 [2022-11-23 03:09:04,416 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 [2022-11-23 03:09:04,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:09:04,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:09:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:04,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:09:04,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:04,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157871479] [2022-11-23 03:09:04,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157871479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:09:04,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:09:04,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 03:09:04,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290150787] [2022-11-23 03:09:04,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:09:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:09:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:04,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:09:04,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:09:04,664 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:05,965 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2022-11-23 03:09:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:09:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 03:09:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:05,967 INFO L225 Difference]: With dead ends: 131 [2022-11-23 03:09:05,968 INFO L226 Difference]: Without dead ends: 131 [2022-11-23 03:09:05,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:09:05,969 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 36 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:05,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 426 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 03:09:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-23 03:09:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-23 03:09:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 118 states have internal predecessors, (131), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 03:09:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-11-23 03:09:05,975 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 19 [2022-11-23 03:09:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:05,975 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-11-23 03:09:05,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:09:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-11-23 03:09:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 03:09:05,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:05,976 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 03:09:05,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:06,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:06,189 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1965497160, now seen corresponding path program 1 times [2022-11-23 03:09:06,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:06,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11029617] [2022-11-23 03:09:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:06,192 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:06,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 03:09:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:06,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:09:06,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:06,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:06,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:09:06,523 WARN L859 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_448 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_448))) (= (_ bv0 1) (select |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base|)))) is different from true [2022-11-23 03:09:06,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:09:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:06,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:09:06,637 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:09:06,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:09:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:06,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:09:07,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:07,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11029617] [2022-11-23 03:09:07,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11029617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:09:07,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [4374373] [2022-11-23 03:09:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:07,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:09:07,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:09:07,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:09:07,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-23 03:09:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 03:09:07,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:07,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:07,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:09:08,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:09:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:08,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:09:08,517 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:09:08,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:09:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:08,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:09:09,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [4374373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:09:09,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:09:09,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2022-11-23 03:09:09,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265265457] [2022-11-23 03:09:09,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:09:09,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:09:09,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:09:09,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=263, Unknown=3, NotChecked=32, Total=342 [2022-11-23 03:09:09,371 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 03:09:12,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:09:16,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:09:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:19,280 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2022-11-23 03:09:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:09:19,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-11-23 03:09:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:19,283 INFO L225 Difference]: With dead ends: 146 [2022-11-23 03:09:19,283 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 03:09:19,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=80, Invalid=471, Unknown=5, NotChecked=44, Total=600 [2022-11-23 03:09:19,284 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 66 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:19,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 394 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 412 Invalid, 2 Unknown, 90 Unchecked, 5.4s Time] [2022-11-23 03:09:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 03:09:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2022-11-23 03:09:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.393939393939394) internal successors, (138), 123 states have internal predecessors, (138), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-23 03:09:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2022-11-23 03:09:19,291 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 29 [2022-11-23 03:09:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:19,291 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2022-11-23 03:09:19,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 03:09:19,292 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2022-11-23 03:09:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 03:09:19,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:19,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-11-23 03:09:19,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:19,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:19,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt [2022-11-23 03:09:19,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1572542800, now seen corresponding path program 1 times [2022-11-23 03:09:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:19,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656542062] [2022-11-23 03:09:19,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:19,714 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:19,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 03:09:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:20,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 03:09:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:20,805 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 14 treesize of output 16 [2022-11-23 03:09:20,827 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:09:20,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:09:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:21,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:09:23,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2022-11-23 03:09:23,543 INFO L321 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2022-11-23 03:09:23,543 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 50 treesize of output 67 [2022-11-23 03:09:24,535 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 03:09:24,535 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 38 treesize of output 32 [2022-11-23 03:09:24,561 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:09:24,561 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 15 treesize of output 14 [2022-11-23 03:09:25,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:09:25,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 03:09:25,436 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:09:25,436 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 15 treesize of output 14 [2022-11-23 03:09:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:25,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656542062] [2022-11-23 03:09:25,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656542062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:09:25,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:09:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2022-11-23 03:09:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700077488] [2022-11-23 03:09:25,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:09:25,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 03:09:25,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:25,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 03:09:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-11-23 03:09:25,789 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:09:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:09:33,353 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2022-11-23 03:09:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:09:33,354 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-23 03:09:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:09:33,356 INFO L225 Difference]: With dead ends: 168 [2022-11-23 03:09:33,356 INFO L226 Difference]: Without dead ends: 168 [2022-11-23 03:09:33,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 03:09:33,360 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 313 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:09:33,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 597 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-23 03:09:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-23 03:09:33,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2022-11-23 03:09:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.336734693877551) internal successors, (131), 120 states have internal predecessors, (131), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-23 03:09:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-11-23 03:09:33,371 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 36 [2022-11-23 03:09:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:09:33,372 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-11-23 03:09:33,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 03:09:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-11-23 03:09:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 03:09:33,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:09:33,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:09:33,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:09:33,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:33,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:09:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:09:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1746009876, now seen corresponding path program 1 times [2022-11-23 03:09:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:09:33,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563232839] [2022-11-23 03:09:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:33,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:09:33,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:09:33,580 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:09:33,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 03:09:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-23 03:09:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:34,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:34,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:34,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:34,313 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 21 treesize of output 20 [2022-11-23 03:09:34,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:34,332 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 21 treesize of output 20 [2022-11-23 03:09:34,398 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:09:34,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:09:34,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:09:34,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:09:34,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:09:34,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:09:36,074 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2022-11-23 03:09:36,153 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2022-11-23 03:09:36,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 128 [2022-11-23 03:09:36,168 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 132 treesize of output 96 [2022-11-23 03:09:36,186 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 42 treesize of output 24 [2022-11-23 03:09:36,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 30 [2022-11-23 03:09:36,517 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 03:09:36,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 03:09:36,734 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 34 treesize of output 32 [2022-11-23 03:09:37,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 19 [2022-11-23 03:09:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:09:42,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:09:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563232839] [2022-11-23 03:09:42,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563232839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:09:42,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [233336447] [2022-11-23 03:09:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:09:42,634 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:09:42,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:09:42,635 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:09:42,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 03:09:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:09:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-23 03:09:43,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:09:43,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:09:43,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:43,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:09:43,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:43,607 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 21 treesize of output 20 [2022-11-23 03:09:43,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:43,624 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 21 treesize of output 20 [2022-11-23 03:09:43,684 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:09:43,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:09:43,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:09:43,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:09:43,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:09:43,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:09:44,901 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2022-11-23 03:09:44,977 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2022-11-23 03:09:44,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 128 [2022-11-23 03:09:44,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 44 treesize of output 26 [2022-11-23 03:09:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:09:45,004 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 120 treesize of output 84 [2022-11-23 03:09:45,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-11-23 03:09:45,190 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 03:09:45,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 03:09:45,452 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 34 treesize of output 32 [2022-11-23 03:09:45,989 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 27 treesize of output 15 [2022-11-23 03:09:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:09:46,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:09:49,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [233336447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:09:49,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:09:49,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 27 [2022-11-23 03:09:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116727412] [2022-11-23 03:09:49,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:09:49,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 03:09:49,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:09:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 03:09:49,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1253, Unknown=40, NotChecked=0, Total=1406 [2022-11-23 03:09:49,962 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 03:10:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:10:01,206 INFO L93 Difference]: Finished difference Result 156 states and 169 transitions. [2022-11-23 03:10:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 03:10:01,207 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-11-23 03:10:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:10:01,208 INFO L225 Difference]: With dead ends: 156 [2022-11-23 03:10:01,208 INFO L226 Difference]: Without dead ends: 156 [2022-11-23 03:10:01,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=307, Invalid=2813, Unknown=72, NotChecked=0, Total=3192 [2022-11-23 03:10:01,211 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 84 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 29 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:10:01,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1048 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1184 Invalid, 8 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 03:10:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-23 03:10:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2022-11-23 03:10:01,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.309090909090909) internal successors, (144), 133 states have internal predecessors, (144), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-23 03:10:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2022-11-23 03:10:01,218 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 35 [2022-11-23 03:10:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:10:01,218 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2022-11-23 03:10:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 03:10:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2022-11-23 03:10:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 03:10:01,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:10:01,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:10:01,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 03:10:01,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:10:01,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:10:01,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:10:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:10:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1746009877, now seen corresponding path program 1 times [2022-11-23 03:10:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:10:01,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979673838] [2022-11-23 03:10:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:10:01,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:10:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:10:01,634 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:10:01,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-23 03:10:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:10:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 03:10:02,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:10:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:10:02,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:10:02,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:10:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:02,397 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 21 treesize of output 20 [2022-11-23 03:10:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:02,413 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 21 treesize of output 20 [2022-11-23 03:10:02,509 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:10:02,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:10:02,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:10:02,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:10:02,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:10:02,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:10:02,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:10:05,045 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 79 [2022-11-23 03:10:05,242 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2022-11-23 03:10:05,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 162 treesize of output 188 [2022-11-23 03:10:05,254 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 60 [2022-11-23 03:10:05,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:05,265 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 154 treesize of output 106 [2022-11-23 03:10:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:05,282 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 30 treesize of output 27 [2022-11-23 03:10:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:05,297 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 20 [2022-11-23 03:10:05,800 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-23 03:10:05,801 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 24 treesize of output 26 [2022-11-23 03:10:05,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:10:06,084 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 [2022-11-23 03:10:06,141 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 03:10:06,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2022-11-23 03:10:06,687 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 13 [2022-11-23 03:10:06,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-23 03:10:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:10:06,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:10:08,493 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_965 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_965) |c_create_sub_list_insert_sub_~head#1.base|) .cse1))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_964 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_965 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_965) |c_create_sub_list_insert_sub_~head#1.base|) .cse1) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_964) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2022-11-23 03:10:20,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:10:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979673838] [2022-11-23 03:10:20,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979673838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:10:20,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1596419223] [2022-11-23 03:10:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:10:20,016 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:10:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:10:20,017 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:10:20,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-23 03:10:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:10:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-23 03:10:21,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:10:21,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:10:21,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:10:21,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:10:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:21,699 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 21 treesize of output 20 [2022-11-23 03:10:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:21,721 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 21 treesize of output 20 [2022-11-23 03:10:21,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:10:21,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:10:21,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:10:21,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:10:21,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:10:21,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:10:21,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:10:28,066 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 86 [2022-11-23 03:10:28,075 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 71 [2022-11-23 03:10:28,176 INFO L321 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2022-11-23 03:10:28,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 150 [2022-11-23 03:10:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:28,188 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 154 treesize of output 106 [2022-11-23 03:10:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:28,206 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 30 treesize of output 27 [2022-11-23 03:10:28,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:10:28,216 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 20 [2022-11-23 03:10:28,971 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-23 03:10:28,971 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 24 treesize of output 26 [2022-11-23 03:10:29,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:10:29,541 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 [2022-11-23 03:10:29,575 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 03:10:29,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 64 [2022-11-23 03:10:29,634 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 13 [2022-11-23 03:10:29,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-23 03:10:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:10:29,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:10:30,125 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1104 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1105 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1104) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1105) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)))) (forall ((v_ArrVal_1104 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1104) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) is different from false [2022-11-23 03:10:44,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1596419223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:10:44,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:10:44,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-11-23 03:10:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855735250] [2022-11-23 03:10:44,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:10:44,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 03:10:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:10:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 03:10:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1415, Unknown=35, NotChecked=154, Total=1722 [2022-11-23 03:10:44,690 INFO L87 Difference]: Start difference. First operand 150 states and 163 transitions. Second operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 03:11:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:11:00,848 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2022-11-23 03:11:00,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 03:11:00,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-23 03:11:00,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:11:00,851 INFO L225 Difference]: With dead ends: 150 [2022-11-23 03:11:00,851 INFO L226 Difference]: Without dead ends: 150 [2022-11-23 03:11:00,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=216, Invalid=2402, Unknown=42, NotChecked=202, Total=2862 [2022-11-23 03:11:00,853 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 58 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 18 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-23 03:11:00,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 855 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1056 Invalid, 20 Unknown, 0 Unchecked, 6.9s Time] [2022-11-23 03:11:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-23 03:11:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-23 03:11:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.3) internal successors, (143), 133 states have internal predecessors, (143), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-23 03:11:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 162 transitions. [2022-11-23 03:11:00,862 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 162 transitions. Word has length 35 [2022-11-23 03:11:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:11:00,862 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 162 transitions. [2022-11-23 03:11:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 03:11:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 162 transitions. [2022-11-23 03:11:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 03:11:00,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:11:00,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:00,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:01,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:01,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:11:01,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:11:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 879107445, now seen corresponding path program 1 times [2022-11-23 03:11:01,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:11:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059641764] [2022-11-23 03:11:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:01,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:11:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:11:01,273 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:11:01,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 03:11:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 03:11:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:01,959 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:11:01,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:11:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:11:02,036 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 21 treesize of output 20 [2022-11-23 03:11:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:11:02,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 03:11:02,082 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:11:02,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:11:02,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:11:02,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:11:02,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:11:02,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:11:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:11:02,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:11:03,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:11:03,072 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 46 treesize of output 50 [2022-11-23 03:11:03,766 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1240 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1240) |c_create_sub_list_insert_sub_~head#1.base|) .cse0) |c_create_sub_list_insert_sub_~head#1.base|)) (forall ((v_ArrVal_1241 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1241) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (bvadd (_ bv8 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (forall ((v_ArrVal_1241 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1241) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) is different from false [2022-11-23 03:11:08,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:11:08,962 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 2 case distinctions, treesize of input 49 treesize of output 42 [2022-11-23 03:11:08,969 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 50 treesize of output 32 [2022-11-23 03:11:08,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-23 03:11:09,023 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-23 03:11:09,023 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 2 case distinctions, treesize of input 25 treesize of output 1 [2022-11-23 03:11:09,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:11:09,049 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 2 case distinctions, treesize of input 29 treesize of output 35 [2022-11-23 03:11:09,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:11:09,068 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 24 treesize of output 12 [2022-11-23 03:11:10,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:11:10,348 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 38 treesize of output 62 [2022-11-23 03:11:10,733 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:11:10,733 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 16 treesize of output 15 [2022-11-23 03:11:10,784 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:11:10,784 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 16 treesize of output 15 [2022-11-23 03:11:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 03:11:10,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:11:10,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059641764] [2022-11-23 03:11:10,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059641764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:11:10,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:11:10,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2022-11-23 03:11:10,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089453648] [2022-11-23 03:11:10,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:11:10,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 03:11:10,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:11:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 03:11:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=733, Unknown=7, NotChecked=54, Total=870 [2022-11-23 03:11:10,821 INFO L87 Difference]: Start difference. First operand 150 states and 162 transitions. Second operand has 30 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 03:11:13,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:11:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:11:27,981 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2022-11-23 03:11:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 03:11:27,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-11-23 03:11:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:11:27,984 INFO L225 Difference]: With dead ends: 210 [2022-11-23 03:11:27,984 INFO L226 Difference]: Without dead ends: 210 [2022-11-23 03:11:27,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=292, Invalid=2357, Unknown=7, NotChecked=100, Total=2756 [2022-11-23 03:11:27,986 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 231 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 31 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:11:27,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 704 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1048 Invalid, 10 Unknown, 144 Unchecked, 8.0s Time] [2022-11-23 03:11:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-23 03:11:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2022-11-23 03:11:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.2682926829268293) internal successors, (156), 147 states have internal predecessors, (156), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (11), 7 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-23 03:11:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2022-11-23 03:11:27,996 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 41 [2022-11-23 03:11:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:11:27,997 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2022-11-23 03:11:27,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 03:11:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2022-11-23 03:11:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 03:11:27,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:11:27,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:28,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:11:28,211 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:11:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1398479560, now seen corresponding path program 1 times [2022-11-23 03:11:28,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:11:28,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480365479] [2022-11-23 03:11:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:28,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:11:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:11:28,214 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:11:28,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-23 03:11:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 03:11:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:28,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:11:28,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:11:28,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:11:29,012 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:11:29,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:11:29,032 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_create_sub_list_insert_sub_~sub~0#1.base_38| (_ BitVec 32)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32)) (v_ArrVal_1343 (_ BitVec 32)) (v_ArrVal_1342 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |v_create_sub_list_insert_sub_~sub~0#1.base_38|)) (= (store (store |c_old(#length)| |v_create_sub_list_insert_sub_~sub~0#1.base_38| v_ArrVal_1342) |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1343) |c_#length|) (not (= |c_create_sub_list_#in~sub#1.base| |create_sub_list_insert_sub_~sub~0#1.base|)))) is different from true [2022-11-23 03:11:29,101 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:11:29,101 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 03:11:29,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:11:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:11:29,232 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:11:29,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-23 03:11:29,259 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:11:29,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:11:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2022-11-23 03:11:29,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:11:30,025 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:11:30,026 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 15 treesize of output 14 [2022-11-23 03:11:36,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:11:36,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480365479] [2022-11-23 03:11:36,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480365479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:11:36,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52199009] [2022-11-23 03:11:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:36,382 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:11:36,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:11:36,383 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:11:36,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-23 03:11:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:37,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 03:11:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:37,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:11:37,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:11:37,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:11:37,731 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:11:37,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:11:37,954 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:11:37,954 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 03:11:37,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:11:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:11:38,550 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:11:38,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-23 03:11:38,574 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:11:38,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:11:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:11:38,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:11:39,441 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:11:39,442 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 15 treesize of output 14 [2022-11-23 03:11:42,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52199009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:11:42,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:11:42,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 21 [2022-11-23 03:11:42,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886361927] [2022-11-23 03:11:42,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:11:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 03:11:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:11:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 03:11:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=581, Unknown=6, NotChecked=48, Total=702 [2022-11-23 03:11:42,160 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 03:11:44,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:11:50,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:11:54,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:11:56,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:11:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:11:58,367 INFO L93 Difference]: Finished difference Result 264 states and 292 transitions. [2022-11-23 03:11:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 03:11:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-11-23 03:11:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:11:58,370 INFO L225 Difference]: With dead ends: 264 [2022-11-23 03:11:58,370 INFO L226 Difference]: Without dead ends: 264 [2022-11-23 03:11:58,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=117, Invalid=935, Unknown=8, NotChecked=62, Total=1122 [2022-11-23 03:11:58,371 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 195 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:11:58,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 539 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1002 Invalid, 3 Unknown, 136 Unchecked, 11.2s Time] [2022-11-23 03:11:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-23 03:11:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 172. [2022-11-23 03:11:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 128 states have (on average 1.265625) internal successors, (162), 151 states have internal predecessors, (162), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (13), 9 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-23 03:11:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2022-11-23 03:11:58,381 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 45 [2022-11-23 03:11:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:11:58,382 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2022-11-23 03:11:58,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 03:11:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2022-11-23 03:11:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 03:11:58,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:11:58,384 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:58,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:58,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt [2022-11-23 03:11:58,801 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:11:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1768276039, now seen corresponding path program 1 times [2022-11-23 03:11:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:11:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553182882] [2022-11-23 03:11:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:58,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:11:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:11:58,803 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:11:58,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 03:11:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 03:11:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:59,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:11:59,302 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:11:59,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:11:59,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 03:11:59,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:11:59,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:11:59,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:11:59,750 WARN L859 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv1 1)))) is different from true [2022-11-23 03:11:59,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:11:59,929 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:11:59,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:12:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-23 03:12:00,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:00,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:12:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553182882] [2022-11-23 03:12:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553182882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232064442] [2022-11-23 03:12:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:00,462 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:12:00,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:12:00,463 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:12:00,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-23 03:12:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 03:12:02,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:02,387 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:12:02,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:12:02,403 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 [2022-11-23 03:12:02,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:02,512 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-23 03:12:02,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-23 03:12:02,646 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 03:12:02,646 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 24 treesize of output 20 [2022-11-23 03:12:02,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:12:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:03,032 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-23 03:12:03,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 45 [2022-11-23 03:12:03,090 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 03:12:03,090 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 24 treesize of output 20 [2022-11-23 03:12:03,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:12:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:03,395 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-23 03:12:03,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 45 [2022-11-23 03:12:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:12:03,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:04,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232064442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:04,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:12:04,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-11-23 03:12:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478016141] [2022-11-23 03:12:04,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:12:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 03:12:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:12:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 03:12:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=499, Unknown=12, NotChecked=46, Total=650 [2022-11-23 03:12:04,128 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 03:12:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:12:07,341 INFO L93 Difference]: Finished difference Result 273 states and 301 transitions. [2022-11-23 03:12:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:12:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-11-23 03:12:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:12:07,344 INFO L225 Difference]: With dead ends: 273 [2022-11-23 03:12:07,344 INFO L226 Difference]: Without dead ends: 273 [2022-11-23 03:12:07,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=183, Invalid=798, Unknown=15, NotChecked=60, Total=1056 [2022-11-23 03:12:07,345 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 445 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 76 mSolverCounterUnsat, 142 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 142 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:12:07,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 395 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 575 Invalid, 142 Unknown, 130 Unchecked, 2.5s Time] [2022-11-23 03:12:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-23 03:12:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 193. [2022-11-23 03:12:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 167 states have internal predecessors, (186), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (22), 13 states have call predecessors, (22), 14 states have call successors, (22) [2022-11-23 03:12:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2022-11-23 03:12:07,355 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 51 [2022-11-23 03:12:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:12:07,356 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2022-11-23 03:12:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 03:12:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2022-11-23 03:12:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 03:12:07,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:12:07,357 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:12:07,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:07,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:07,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:12:07,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:12:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1768276040, now seen corresponding path program 1 times [2022-11-23 03:12:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:12:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207669192] [2022-11-23 03:12:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:07,769 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:12:07,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:12:07,770 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:12:07,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-23 03:12:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:08,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 03:12:08,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:08,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:08,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:12:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:08,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:12:08,320 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:12:08,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:12:08,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:12:08,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:08,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:08,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:12:08,874 WARN L859 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv12 32)))) is different from true [2022-11-23 03:12:08,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:09,088 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:12:09,089 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 18 [2022-11-23 03:12:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-23 03:12:09,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:10,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:12:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207669192] [2022-11-23 03:12:10,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207669192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:10,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707228635] [2022-11-23 03:12:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:12:10,137 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:12:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:12:10,143 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:12:10,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-23 03:12:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:12:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 03:12:12,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:12,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:12,150 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 [2022-11-23 03:12:12,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:12,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:12:12,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:12:12,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:12,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:12:12,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:12:12,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:13,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:13,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:12:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:12:13,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:18,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707228635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:18,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:12:18,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2022-11-23 03:12:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277143104] [2022-11-23 03:12:18,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:12:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 03:12:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:12:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 03:12:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=473, Unknown=7, NotChecked=44, Total=600 [2022-11-23 03:12:18,277 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 20 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 03:12:18,606 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1803 (_ BitVec 32)) (|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1803) |c_#length|) (bvult |create_sub_list_insert_sub_~sub~0#1.base| |c_#StackHeapBarrier|))) (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv12 32)))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-11-23 03:12:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:12:25,048 INFO L93 Difference]: Finished difference Result 437 states and 487 transitions. [2022-11-23 03:12:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 03:12:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-11-23 03:12:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:12:25,051 INFO L225 Difference]: With dead ends: 437 [2022-11-23 03:12:25,051 INFO L226 Difference]: Without dead ends: 437 [2022-11-23 03:12:25,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=138, Invalid=788, Unknown=12, NotChecked=118, Total=1056 [2022-11-23 03:12:25,053 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 431 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 48 mSolverCounterUnsat, 192 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 192 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:12:25,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 812 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 950 Invalid, 192 Unknown, 235 Unchecked, 4.1s Time] [2022-11-23 03:12:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-23 03:12:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 287. [2022-11-23 03:12:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 221 states have (on average 1.2669683257918551) internal successors, (280), 244 states have internal predecessors, (280), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (39), 21 states have call predecessors, (39), 24 states have call successors, (39) [2022-11-23 03:12:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 343 transitions. [2022-11-23 03:12:25,066 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 343 transitions. Word has length 51 [2022-11-23 03:12:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:12:25,067 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 343 transitions. [2022-11-23 03:12:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 03:12:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 343 transitions. [2022-11-23 03:12:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 03:12:25,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:12:25,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:12:25,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:25,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-23 03:12:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt [2022-11-23 03:12:25,485 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:12:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:12:25,486 INFO L85 PathProgramCache]: Analyzing trace with hash 636971300, now seen corresponding path program 2 times [2022-11-23 03:12:25,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:12:25,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297883837] [2022-11-23 03:12:25,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:12:25,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:12:25,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:12:25,487 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:12:25,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-23 03:12:26,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:12:26,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:12:26,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-23 03:12:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:26,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:12:26,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:12:26,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:26,347 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 21 treesize of output 20 [2022-11-23 03:12:26,384 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:12:26,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:12:26,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:12:26,780 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 13 treesize of output 9 [2022-11-23 03:12:26,930 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:12:26,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 03:12:26,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:12:27,067 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:12:27,068 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 20 treesize of output 26 [2022-11-23 03:12:28,092 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-23 03:12:28,092 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 31 treesize of output 46 [2022-11-23 03:12:28,287 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 [2022-11-23 03:12:28,438 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:12:28,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:12:28,646 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 17 treesize of output 19 [2022-11-23 03:12:28,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 treesize of output 4 [2022-11-23 03:12:30,116 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-23 03:12:30,180 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 03:12:30,180 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2022-11-23 03:12:30,460 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 03:12:30,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 03:12:30,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:30,668 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 34 treesize of output 32 [2022-11-23 03:12:31,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 19 [2022-11-23 03:12:31,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 03:12:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:31,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:32,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-23 03:12:34,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:12:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297883837] [2022-11-23 03:12:34,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297883837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:34,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1213235549] [2022-11-23 03:12:34,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:12:34,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:12:34,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:12:34,798 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:12:34,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-23 03:12:35,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:12:35,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134750197] [2022-11-23 03:12:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:12:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:12:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:12:35,578 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:12:35,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 03:12:35,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 1 [2022-11-23 03:12:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:12:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:12:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-23 03:12:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:37,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:12:37,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:12:37,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:12:38,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:12:38,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:12:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:38,226 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 21 treesize of output 20 [2022-11-23 03:12:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:12:38,236 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 21 treesize of output 20 [2022-11-23 03:12:38,442 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:12:38,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:12:38,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:12:38,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:12:41,216 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2022-11-23 03:12:41,297 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2022-11-23 03:12:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 117 [2022-11-23 03:12:41,305 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 121 treesize of output 89 [2022-11-23 03:12:41,314 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 42 treesize of output 24 [2022-11-23 03:12:41,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 30 [2022-11-23 03:12:41,431 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:12:41,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:12:41,512 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 17 treesize of output 19 [2022-11-23 03:12:41,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 treesize of output 4 [2022-11-23 03:12:44,145 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-23 03:12:44,207 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 03:12:44,207 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 46 [2022-11-23 03:12:44,387 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 03:12:44,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 03:12:44,695 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 34 treesize of output 32 [2022-11-23 03:12:45,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 19 [2022-11-23 03:12:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:12:45,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:48,722 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_67| (_ BitVec 32)) (v_ArrVal_2379 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2378 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_67| v_ArrVal_2378) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_67| v_ArrVal_2379) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_67|))))) is different from false [2022-11-23 03:12:49,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134750197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:12:49,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:12:49,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2022-11-23 03:12:49,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049459375] [2022-11-23 03:12:49,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:12:49,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-23 03:12:49,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:12:49,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-23 03:12:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4372, Unknown=93, NotChecked=134, Total=4830 [2022-11-23 03:12:49,763 INFO L87 Difference]: Start difference. First operand 287 states and 343 transitions. Second operand has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 49 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 03:13:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:13:18,183 INFO L93 Difference]: Finished difference Result 288 states and 342 transitions. [2022-11-23 03:13:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 03:13:18,191 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 49 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2022-11-23 03:13:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:13:18,193 INFO L225 Difference]: With dead ends: 288 [2022-11-23 03:13:18,193 INFO L226 Difference]: Without dead ends: 288 [2022-11-23 03:13:18,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2883 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=687, Invalid=9241, Unknown=176, NotChecked=198, Total=10302 [2022-11-23 03:13:18,196 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 134 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 45 mSolverCounterUnsat, 76 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 76 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-23 03:13:18,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1321 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1870 Invalid, 76 Unknown, 0 Unchecked, 10.6s Time] [2022-11-23 03:13:18,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-23 03:13:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-11-23 03:13:18,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 221 states have (on average 1.262443438914027) internal successors, (279), 244 states have internal predecessors, (279), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (39), 21 states have call predecessors, (39), 24 states have call successors, (39) [2022-11-23 03:13:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 342 transitions. [2022-11-23 03:13:18,207 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 342 transitions. Word has length 51 [2022-11-23 03:13:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:13:18,207 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 342 transitions. [2022-11-23 03:13:18,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 49 states have internal predecessors, (76), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 03:13:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 342 transitions. [2022-11-23 03:13:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 03:13:18,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:13:18,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:13:18,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:18,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-23 03:13:18,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:13:18,619 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:13:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:13:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 636971301, now seen corresponding path program 2 times [2022-11-23 03:13:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:13:18,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429147852] [2022-11-23 03:13:18,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:13:18,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:13:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:13:18,621 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:13:18,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-23 03:13:19,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:13:19,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:13:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-23 03:13:19,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:13:19,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:13:19,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:13:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:13:19,643 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 21 treesize of output 20 [2022-11-23 03:13:19,670 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:13:19,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:13:19,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:13:20,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:13:20,206 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:13:20,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 03:13:20,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:13:20,384 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:13:20,384 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 20 treesize of output 26 [2022-11-23 03:13:21,533 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-23 03:13:21,533 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 31 treesize of output 46 [2022-11-23 03:13:21,766 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 [2022-11-23 03:13:21,919 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:13:21,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:13:21,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:13:22,156 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 17 treesize of output 19 [2022-11-23 03:13:22,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 treesize of output 4 [2022-11-23 03:13:22,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:13:23,209 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:13:23,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 03:13:23,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:13:23,528 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:13:23,529 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 20 treesize of output 26 [2022-11-23 03:13:23,791 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 03:13:23,791 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 26 treesize of output 38 [2022-11-23 03:13:23,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:13:24,157 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-23 03:13:24,226 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 03:13:24,227 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 55 [2022-11-23 03:13:24,611 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-23 03:13:24,612 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 24 treesize of output 26 [2022-11-23 03:13:24,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:13:24,862 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 32 treesize of output 30 [2022-11-23 03:13:24,873 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 [2022-11-23 03:13:25,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 33 treesize of output 17 [2022-11-23 03:13:25,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:13:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:13:26,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:13:30,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:13:30,337 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 71 treesize of output 60 [2022-11-23 03:13:30,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:13:30,394 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 414 treesize of output 395 [2022-11-23 03:13:30,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 378 treesize of output 314 [2022-11-23 03:13:30,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 282 [2022-11-23 03:13:30,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2022-11-23 03:13:31,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:13:31,188 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 74 treesize of output 75 [2022-11-23 03:13:31,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:13:31,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:13:31,283 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 482 treesize of output 475 [2022-11-23 03:13:31,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 221 [2022-11-23 03:13:31,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 450 treesize of output 434 [2022-11-23 03:14:43,519 WARN L233 SmtUtils]: Spent 57.67s on a formula simplification. DAG size of input: 114 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:14:43,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:14:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429147852] [2022-11-23 03:14:43,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429147852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:14:43,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1953028164] [2022-11-23 03:14:43,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:14:43,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:14:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:14:43,525 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:14:43,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-23 03:14:46,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:14:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:14:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-23 03:14:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:14:46,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:14:46,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:14:46,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:14:46,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:14:46,896 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 21 treesize of output 20 [2022-11-23 03:14:46,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:14:46,927 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 21 treesize of output 20 [2022-11-23 03:14:47,033 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:14:47,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:14:47,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:14:47,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:14:53,069 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 43 [2022-11-23 03:14:53,216 INFO L321 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2022-11-23 03:14:53,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 117 [2022-11-23 03:14:53,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 44 treesize of output 26 [2022-11-23 03:14:53,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:14:53,248 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 109 treesize of output 77 [2022-11-23 03:14:53,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-11-23 03:14:53,501 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:14:53,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:14:53,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:14:53,829 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 17 treesize of output 19 [2022-11-23 03:14:53,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 8 treesize of output 4 [2022-11-23 03:14:54,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 03:14:54,812 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:14:54,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 03:14:54,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:14:55,248 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:14:55,248 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 20 treesize of output 26 [2022-11-23 03:14:55,810 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 03:14:55,810 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 26 treesize of output 38 [2022-11-23 03:14:55,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:14:56,528 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-23 03:14:56,691 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-23 03:14:56,692 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 55 [2022-11-23 03:14:57,005 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-23 03:14:57,005 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 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:14:57,167 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-23 03:14:57,167 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 24 treesize of output 26 [2022-11-23 03:14:57,920 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 32 treesize of output 30 [2022-11-23 03:14:57,975 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 [2022-11-23 03:14:59,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:14:59,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 03:14:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:14:59,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 03:15:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:15:01,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:15:08,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:15:08,892 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 74 treesize of output 75 [2022-11-23 03:15:09,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:15:09,010 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 468 treesize of output 467 [2022-11-23 03:15:09,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 450 treesize of output 434 [2022-11-23 03:15:09,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 434 treesize of output 426 [2022-11-23 03:15:09,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 210 [2022-11-23 03:15:19,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:20,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:20,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:20,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:20,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:20,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:21,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:21,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:21,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:21,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:21,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:21,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-23 03:15:21,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:21,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:22,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:22,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:22,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:22,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:22,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:22,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:23,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:23,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:23,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:23,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:23,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-23 03:15:23,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:24,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:24,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:25,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:25,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:25,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:25,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:26,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:26,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:26,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:26,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-23 03:15:26,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:26,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-23 03:15:26,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-23 03:15:26,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:15:26,882 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 71 treesize of output 60 [2022-11-23 03:15:27,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:15:27,001 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 474 treesize of output 455 [2022-11-23 03:15:27,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 374 [2022-11-23 03:15:27,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 374 treesize of output 342 [2022-11-23 03:15:27,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 162 [2022-11-23 03:17:37,334 WARN L233 SmtUtils]: Spent 43.93s on a formula simplification. DAG size of input: 449 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:17:37,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1953028164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:17:37,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:17:37,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2022-11-23 03:17:37,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653732263] [2022-11-23 03:17:37,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:17:37,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-23 03:17:37,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:17:37,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-23 03:17:37,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3304, Unknown=46, NotChecked=0, Total=3540 [2022-11-23 03:17:37,338 INFO L87 Difference]: Start difference. First operand 287 states and 342 transitions. Second operand has 47 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 03:18:30,922 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 141 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:18:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:18:37,665 INFO L93 Difference]: Finished difference Result 288 states and 342 transitions. [2022-11-23 03:18:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 03:18:37,666 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2022-11-23 03:18:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:18:37,668 INFO L225 Difference]: With dead ends: 288 [2022-11-23 03:18:37,668 INFO L226 Difference]: Without dead ends: 288 [2022-11-23 03:18:37,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 260.2s TimeCoverageRelationStatistics Valid=653, Invalid=7830, Unknown=73, NotChecked=0, Total=8556 [2022-11-23 03:18:37,671 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 120 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 46 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:18:37,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1665 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2145 Invalid, 35 Unknown, 0 Unchecked, 20.4s Time] [2022-11-23 03:18:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-23 03:18:37,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-11-23 03:18:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 221 states have (on average 1.257918552036199) internal successors, (278), 244 states have internal predecessors, (278), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (39), 21 states have call predecessors, (39), 24 states have call successors, (39) [2022-11-23 03:18:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 341 transitions. [2022-11-23 03:18:37,681 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 341 transitions. Word has length 51 [2022-11-23 03:18:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:18:37,681 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 341 transitions. [2022-11-23 03:18:37,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 41 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 03:18:37,682 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 341 transitions. [2022-11-23 03:18:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 03:18:37,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:18:37,683 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:18:37,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-23 03:18:37,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-23 03:18:38,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:18:38,093 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting list_add_tailErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:18:38,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:18:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 937684793, now seen corresponding path program 1 times [2022-11-23 03:18:38,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:18:38,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802701605] [2022-11-23 03:18:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:38,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:18:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:18:38,095 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:18:38,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-23 03:18:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:38,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 03:18:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:18:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:18:39,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:18:40,037 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:18:40,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-23 03:18:40,183 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 03:18:40,183 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 16 treesize of output 15 [2022-11-23 03:18:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:18:40,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:18:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802701605] [2022-11-23 03:18:40,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802701605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:18:40,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:18:40,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-11-23 03:18:40,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254706696] [2022-11-23 03:18:40,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:18:40,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:18:40,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:18:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:18:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:18:40,266 INFO L87 Difference]: Start difference. First operand 287 states and 341 transitions. Second operand has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:18:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:18:43,617 INFO L93 Difference]: Finished difference Result 316 states and 367 transitions. [2022-11-23 03:18:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:18:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-11-23 03:18:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:18:43,620 INFO L225 Difference]: With dead ends: 316 [2022-11-23 03:18:43,620 INFO L226 Difference]: Without dead ends: 316 [2022-11-23 03:18:43,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:18:43,621 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 117 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:18:43,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 330 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 03:18:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-23 03:18:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 286. [2022-11-23 03:18:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 221 states have (on average 1.239819004524887) internal successors, (274), 243 states have internal predecessors, (274), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (39), 21 states have call predecessors, (39), 24 states have call successors, (39) [2022-11-23 03:18:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 337 transitions. [2022-11-23 03:18:43,634 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 337 transitions. Word has length 54 [2022-11-23 03:18:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:18:43,634 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 337 transitions. [2022-11-23 03:18:43,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:18:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 337 transitions. [2022-11-23 03:18:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 03:18:43,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:18:43,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:18:43,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-23 03:18:43,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:18:43,851 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting list_add_tailErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:18:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:18:43,851 INFO L85 PathProgramCache]: Analyzing trace with hash 937684794, now seen corresponding path program 1 times [2022-11-23 03:18:43,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:18:43,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963266160] [2022-11-23 03:18:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:43,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:18:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:18:43,853 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:18:43,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-23 03:18:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:44,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 03:18:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:18:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:18:45,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:18:47,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-23 03:18:48,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:18:48,684 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 16 treesize of output 20 [2022-11-23 03:18:50,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:18:50,366 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 16 treesize of output 20 [2022-11-23 03:18:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:18:52,003 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:18:52,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963266160] [2022-11-23 03:18:52,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963266160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:18:52,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:18:52,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-23 03:18:52,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706216619] [2022-11-23 03:18:52,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:18:52,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 03:18:52,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:18:52,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 03:18:52,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-23 03:18:52,005 INFO L87 Difference]: Start difference. First operand 286 states and 337 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 03:19:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:19:00,197 INFO L93 Difference]: Finished difference Result 286 states and 329 transitions. [2022-11-23 03:19:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 03:19:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2022-11-23 03:19:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:19:00,203 INFO L225 Difference]: With dead ends: 286 [2022-11-23 03:19:00,203 INFO L226 Difference]: Without dead ends: 286 [2022-11-23 03:19:00,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 03:19:00,204 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 269 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:19:00,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 542 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 03:19:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-23 03:19:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2022-11-23 03:19:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 221 states have (on average 1.2036199095022624) internal successors, (266), 241 states have internal predecessors, (266), 24 states have call successors, (24), 21 states have call predecessors, (24), 19 states have return successors, (39), 21 states have call predecessors, (39), 24 states have call successors, (39) [2022-11-23 03:19:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 329 transitions. [2022-11-23 03:19:00,216 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 329 transitions. Word has length 54 [2022-11-23 03:19:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:19:00,216 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 329 transitions. [2022-11-23 03:19:00,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 03:19:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 329 transitions. [2022-11-23 03:19:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 03:19:00,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:19:00,218 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:19:00,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-23 03:19:00,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:19:00,441 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:19:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:19:00,441 INFO L85 PathProgramCache]: Analyzing trace with hash -828042884, now seen corresponding path program 1 times [2022-11-23 03:19:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:19:00,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639862799] [2022-11-23 03:19:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:19:00,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:19:00,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:19:00,443 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:19:00,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-23 03:19:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-23 03:19:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:19:01,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:01,248 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 18 [2022-11-23 03:19:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:01,605 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 03:19:01,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 41 [2022-11-23 03:19:02,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 03:19:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:02,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:19:02,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-11-23 03:19:03,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:19:06,891 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 53 [2022-11-23 03:19:06,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:06,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:07,066 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:19:07,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2022-11-23 03:19:07,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:07,297 INFO L321 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2022-11-23 03:19:07,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 35 [2022-11-23 03:19:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:19:07,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-23 03:19:07,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2022-11-23 03:19:09,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:19:13,813 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 53 [2022-11-23 03:19:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:13,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:14,021 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:19:14,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2022-11-23 03:19:14,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 03:19:14,145 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:19:14,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:19:15,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 03:19:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:19:16,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:19:17,161 INFO L321 Elim1Store]: treesize reduction 7, result has 56.3 percent of original size [2022-11-23 03:19:17,161 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 22 treesize of output 21 [2022-11-23 03:19:20,878 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:19:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639862799] [2022-11-23 03:19:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639862799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:19:20,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977830159] [2022-11-23 03:19:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:19:20,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:19:20,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:19:20,880 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:19:20,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-23 03:19:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:19:23,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-23 03:19:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:19:23,856 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 03:19:23,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 03:19:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:24,593 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-23 03:19:24,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-23 03:19:25,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:19:25,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:25,465 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-23 03:19:25,465 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 22 treesize of output 16 [2022-11-23 03:19:29,407 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-23 03:19:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-11-23 03:19:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,526 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:19:32,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 40 [2022-11-23 03:19:32,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:19:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:32,840 INFO L321 Elim1Store]: treesize reduction 71, result has 18.4 percent of original size [2022-11-23 03:19:32,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 48 [2022-11-23 03:19:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:33,869 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-23 03:19:33,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2022-11-23 03:19:33,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:19:39,880 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-23 03:19:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 57 [2022-11-23 03:19:50,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,417 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:19:50,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 36 [2022-11-23 03:19:50,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:19:50,733 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-23 03:19:50,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2022-11-23 03:19:51,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:19:54,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-23 03:19:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:19:57,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:20:02,185 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3339 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3341 (_ BitVec 32)) (|v_create_sub_list_insert_sub_~sub~0#1.base_102| (_ BitVec 32)) (v_ArrVal_3338 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3337 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_102|) (_ bv0 1))) (not (bvult |v_create_sub_list_insert_sub_~sub~0#1.base_102| |c_#StackHeapBarrier|)) (= (bvadd (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_102| (_ bv1 1)) (select (select (let ((.cse1 (bvadd |c_ULTIMATE.start_insert_top_~top~0#1.offset| (_ bv20 32)))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_insert_top_~top~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_insert_top_~top~0#1.base|) .cse1 |c_ULTIMATE.start_insert_top_~top~0#1.base|) (bvadd (_ bv16 32) |c_ULTIMATE.start_insert_top_~top~0#1.offset|) v_ArrVal_3341)) |v_create_sub_list_insert_sub_~sub~0#1.base_102| v_ArrVal_3339))) (store (store (store .cse0 |c_ULTIMATE.start_insert_top_~top~0#1.base| v_ArrVal_3338) |v_create_sub_list_insert_sub_~sub~0#1.base_102| v_ArrVal_3337) (select (select .cse0 |c_ULTIMATE.start_insert_top_~top~0#1.base|) .cse1) v_ArrVal_3340))) |c_ULTIMATE.start_insert_top_~head#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_insert_top_~head#1.offset|))) (_ bv1 1)) (_ bv0 1)))) is different from false [2022-11-23 03:20:02,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977830159] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:20:02,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:20:02,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39] total 65 [2022-11-23 03:20:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951337683] [2022-11-23 03:20:02,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:20:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-23 03:20:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:20:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-23 03:20:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=5298, Unknown=131, NotChecked=148, Total=5852 [2022-11-23 03:20:02,200 INFO L87 Difference]: Start difference. First operand 284 states and 329 transitions. Second operand has 67 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 55 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-23 03:20:09,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:20:35,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:20:56,420 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 110 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:21:12,867 WARN L233 SmtUtils]: Spent 11.04s on a formula simplification. DAG size of input: 135 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:21:15,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:21:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:21:32,001 INFO L93 Difference]: Finished difference Result 344 states and 389 transitions. [2022-11-23 03:21:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 03:21:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 55 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2022-11-23 03:21:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:21:32,005 INFO L225 Difference]: With dead ends: 344 [2022-11-23 03:21:32,006 INFO L226 Difference]: Without dead ends: 344 [2022-11-23 03:21:32,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 93.4s TimeCoverageRelationStatistics Valid=671, Invalid=9747, Unknown=298, NotChecked=204, Total=10920 [2022-11-23 03:21:32,010 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 239 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 73 mSolverCounterUnsat, 114 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 114 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:21:32,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1163 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1872 Invalid, 114 Unknown, 0 Unchecked, 36.4s Time] [2022-11-23 03:21:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-23 03:21:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 309. [2022-11-23 03:21:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.1900826446280992) internal successors, (288), 262 states have internal predecessors, (288), 25 states have call successors, (25), 23 states have call predecessors, (25), 22 states have return successors, (40), 23 states have call predecessors, (40), 25 states have call successors, (40) [2022-11-23 03:21:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 353 transitions. [2022-11-23 03:21:32,022 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 353 transitions. Word has length 56 [2022-11-23 03:21:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:21:32,022 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 353 transitions. [2022-11-23 03:21:32,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 55 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-23 03:21:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 353 transitions. [2022-11-23 03:21:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 03:21:32,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:21:32,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:32,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:32,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:32,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:21:32,436 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-23 03:21:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:32,436 INFO L85 PathProgramCache]: Analyzing trace with hash -828042883, now seen corresponding path program 1 times [2022-11-23 03:21:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 03:21:32,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652680857] [2022-11-23 03:21:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:32,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 03:21:32,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 03:21:32,438 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 03:21:32,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-23 03:21:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:33,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-23 03:21:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:33,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:21:33,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:21:33,581 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:21:33,581 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 18 [2022-11-23 03:21:33,750 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 03:21:33,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 03:21:34,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 03:21:34,142 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 [2022-11-23 03:21:34,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:21:34,172 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 [2022-11-23 03:21:35,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:21:35,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:21:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:39,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:21:39,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2022-11-23 03:21:39,876 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-23 03:21:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:39,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:40,092 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:21:40,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 35 [2022-11-23 03:21:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:40,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:21:40,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:40,236 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:21:40,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2022-11-23 03:21:40,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:21:40,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-23 03:21:40,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2022-11-23 03:21:40,773 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 [2022-11-23 03:21:40,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:21:43,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:21:43,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:21:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:47,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:21:47,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2022-11-23 03:21:47,999 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-11-23 03:21:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:48,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:48,235 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:21:48,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 35 [2022-11-23 03:21:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:48,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:21:48,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 03:21:48,426 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:21:48,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:21:49,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:21:49,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:21:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 03:21:51,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:58,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 03:21:58,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652680857] [2022-11-23 03:21:58,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652680857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:58,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1398611734] [2022-11-23 03:21:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:58,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 03:21:58,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 [2022-11-23 03:21:58,208 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 03:21:58,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb616757-8621-4587-9211-218b104d700d/bin/uautomizer-QkZJyEgLgS/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-23 03:22:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:22:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 151 conjunts are in the unsatisfiable core [2022-11-23 03:22:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:22:01,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:22:02,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 03:22:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:02,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:22:03,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:22:03,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:22:03,363 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 [2022-11-23 03:22:03,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 03:22:07,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:22:07,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:22:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:22:11,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2022-11-23 03:22:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 63 [2022-11-23 03:22:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,800 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:22:11,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 40 [2022-11-23 03:22:11,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:11,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:22:11,907 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:22:11,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:22:11,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 03:22:12,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:22:12,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:22:12,864 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 [2022-11-23 03:22:12,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2022-11-23 03:22:19,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:22:19,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:22:30,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:22:30,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2022-11-23 03:22:30,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 57 [2022-11-23 03:22:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:30,934 INFO L321 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2022-11-23 03:22:30,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 36 [2022-11-23 03:22:30,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 03:22:30,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:22:31,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:22:31,081 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 03:22:31,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 03:22:34,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 03:22:34,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-23 03:22:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:37,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:22:46,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1398611734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:22:46,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:22:46,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39] total 64 [2022-11-23 03:22:46,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960462829] [2022-11-23 03:22:46,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:22:46,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-23 03:22:46,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 03:22:46,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-23 03:22:46,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4692, Unknown=164, NotChecked=0, Total=5112 [2022-11-23 03:22:46,585 INFO L87 Difference]: Start difference. First operand 309 states and 353 transitions. Second operand has 65 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-23 03:22:51,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:23:19,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]