./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- 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-2329fc7 [2022-12-14 13:55:36,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:55:36,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:55:36,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:55:36,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:55:36,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:55:36,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:55:36,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:55:36,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:55:36,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:55:36,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:55:36,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:55:36,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:55:36,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:55:36,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:55:36,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:55:36,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:55:36,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:55:36,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:55:36,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:55:36,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:55:36,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:55:36,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:55:36,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:55:36,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:55:36,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:55:36,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:55:36,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:55:36,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:55:36,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:55:36,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:55:36,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:55:36,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:55:36,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:55:36,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:55:36,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:55:36,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:55:36,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:55:36,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:55:36,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:55:36,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:55:36,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 13:55:36,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:55:36,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:55:36,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:55:36,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:55:36,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:55:36,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:55:36,481 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:55:36,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:55:36,481 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:55:36,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:55:36,481 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:55:36,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:55:36,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:55:36,482 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:55:36,482 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:55:36,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:55:36,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:55:36,483 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:55:36,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:55:36,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:55:36,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:55:36,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:55:36,484 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:55:36,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:55:36,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:55:36,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:55:36,485 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:55:36,485 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:55:36,485 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:55:36,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:55:36,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:55:36,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:55:36,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:55:36,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:55:36,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:55:36,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:55:36,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:55:36,487 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:55:36,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:55:36,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:55:36,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:55:36,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:55:36,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2022-12-14 13:55:36,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:55:36,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:55:36,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:55:36,686 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:55:36,686 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:55:36,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-12-14 13:55:39,288 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:55:39,456 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:55:39,456 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-12-14 13:55:39,463 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data/4b7fa47e2/653ae484c25d4b9cacb2c53f9cf321f9/FLAG5d38afddb [2022-12-14 13:55:39,473 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data/4b7fa47e2/653ae484c25d4b9cacb2c53f9cf321f9 [2022-12-14 13:55:39,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:55:39,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:55:39,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:55:39,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:55:39,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:55:39,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:55:39" (1/1) ... [2022-12-14 13:55:39,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2583c43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:39, skipping insertion in model container [2022-12-14 13:55:39,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:55:39" (1/1) ... [2022-12-14 13:55:39,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:55:39,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:55:39,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:55:39,688 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) [2022-12-14 13:55:39,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@511c9728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:39, skipping insertion in model container [2022-12-14 13:55:39,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:55:39,689 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 13:55:39,690 INFO L158 Benchmark]: Toolchain (without parser) took 213.38ms. Allocated memory is still 134.2MB. Free memory was 97.0MB in the beginning and 85.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 13:55:39,691 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 77.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:55:39,691 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.82ms. Allocated memory is still 134.2MB. Free memory was 97.0MB in the beginning and 85.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 13:55:39,692 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 134.2MB. Free memory is still 77.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.82ms. Allocated memory is still 134.2MB. Free memory was 97.0MB in the beginning and 85.5MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- 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-2329fc7 [2022-12-14 13:55:41,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:55:41,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:55:41,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:55:41,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:55:41,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:55:41,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:55:41,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:55:41,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:55:41,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:55:41,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:55:41,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:55:41,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:55:41,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:55:41,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:55:41,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:55:41,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:55:41,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:55:41,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:55:41,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:55:41,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:55:41,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:55:41,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:55:41,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:55:41,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:55:41,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:55:41,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:55:41,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:55:41,197 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:55:41,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:55:41,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:55:41,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:55:41,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:55:41,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:55:41,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:55:41,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:55:41,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:55:41,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:55:41,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:55:41,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:55:41,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:55:41,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 13:55:41,216 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:55:41,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:55:41,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:55:41,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:55:41,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:55:41,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:55:41,217 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:55:41,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:55:41,218 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:55:41,218 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:55:41,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:55:41,218 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:55:41,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 13:55:41,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 13:55:41,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:55:41,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 13:55:41,220 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 13:55:41,220 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 13:55:41,220 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:55:41,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:55:41,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:55:41,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 13:55:41,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:55:41,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:55:41,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:55:41,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:55:41,224 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 13:55:41,224 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 13:55:41,224 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:55:41,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 13:55:41,225 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2022-12-14 13:55:41,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:55:41,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:55:41,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:55:41,446 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:55:41,446 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:55:41,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-12-14 13:55:43,907 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:55:44,104 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:55:44,104 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2022-12-14 13:55:44,113 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data/02c2e70e2/b8bd018bbfe8480693b47abaceb52f44/FLAGf20634115 [2022-12-14 13:55:44,485 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/data/02c2e70e2/b8bd018bbfe8480693b47abaceb52f44 [2022-12-14 13:55:44,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:55:44,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:55:44,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:55:44,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:55:44,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:55:44,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fab8a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44, skipping insertion in model container [2022-12-14 13:55:44,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:55:44,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:55:44,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:55:44,705 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 13:55:44,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:55:44,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:55:44,732 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:55:44,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:55:44,797 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:55:44,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44 WrapperNode [2022-12-14 13:55:44,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:55:44,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:55:44,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:55:44,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:55:44,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,834 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-12-14 13:55:44,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:55:44,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:55:44,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:55:44,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:55:44,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,857 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,861 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:55:44,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:55:44,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:55:44,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:55:44,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (1/1) ... [2022-12-14 13:55:44,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:55:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:44,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:55:44,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:55:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 13:55:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:55:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:55:44,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 13:55:44,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:55:44,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:55:45,012 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:55:45,014 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:55:45,269 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:55:45,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:55:45,273 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 13:55:45,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:55:45 BoogieIcfgContainer [2022-12-14 13:55:45,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:55:45,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:55:45,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:55:45,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:55:45,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:55:44" (1/3) ... [2022-12-14 13:55:45,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afe2a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:55:45, skipping insertion in model container [2022-12-14 13:55:45,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:55:44" (2/3) ... [2022-12-14 13:55:45,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afe2a9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:55:45, skipping insertion in model container [2022-12-14 13:55:45,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:55:45" (3/3) ... [2022-12-14 13:55:45,281 INFO L112 eAbstractionObserver]: Analyzing ICFG selectionsort-alloca-1.i [2022-12-14 13:55:45,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:55:45,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-14 13:55:45,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:55:45,330 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7e946d6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:55:45,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-12-14 13:55:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 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) [2022-12-14 13:55:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:55:45,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:45,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:55:45,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-12-14 13:55:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:45,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442303150] [2022-12-14 13:55:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:45,351 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 [2022-12-14 13:55:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:45,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:45,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:45,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:55:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:45,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 13:55:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:45,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:45,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:45,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442303150] [2022-12-14 13:55:45,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442303150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:45,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:45,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:55:45,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251329851] [2022-12-14 13:55:45,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:55:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:55:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:55:45,500 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 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) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 13:55:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:45,572 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-12-14 13:55:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:55:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-14 13:55:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:45,579 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:55:45,579 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 13:55:45,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:55:45,583 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:45,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:55:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 13:55:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 13:55:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 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) [2022-12-14 13:55:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-12-14 13:55:45,605 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2022-12-14 13:55:45,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:45,605 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-12-14 13:55:45,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 13:55:45,605 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-12-14 13:55:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:55:45,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:45,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:55:45,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:45,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-12-14 13:55:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:45,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482287404] [2022-12-14 13:55:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:45,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:45,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:45,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:45,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:45,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:55:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:45,997 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 [2022-12-14 13:55:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:46,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:46,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:46,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482287404] [2022-12-14 13:55:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482287404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:46,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:46,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:55:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119963244] [2022-12-14 13:55:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:55:46,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:55:46,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:55:46,027 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-12-14 13:55:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:46,242 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-12-14 13:55:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:55:46,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-12-14 13:55:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:46,244 INFO L225 Difference]: With dead ends: 77 [2022-12-14 13:55:46,244 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 13:55:46,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:55:46,246 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:46,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 145 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:55:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 13:55:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-12-14 13:55:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 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) [2022-12-14 13:55:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-14 13:55:46,252 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2022-12-14 13:55:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:46,252 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-14 13:55:46,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-12-14 13:55:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-14 13:55:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:55:46,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:46,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:55:46,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:46,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:46,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:46,457 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-12-14 13:55:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:46,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556735458] [2022-12-14 13:55:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:46,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:46,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:46,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:46,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:55:46,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:46,605 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 8 treesize of output 7 [2022-12-14 13:55:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:46,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:46,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556735458] [2022-12-14 13:55:46,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556735458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:46,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:46,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:55:46,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509541928] [2022-12-14 13:55:46,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:46,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:55:46,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:55:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:55:46,656 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-12-14 13:55:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:46,796 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-12-14 13:55:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:55:46,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2022-12-14 13:55:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:46,798 INFO L225 Difference]: With dead ends: 45 [2022-12-14 13:55:46,798 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 13:55:46,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:55:46,799 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:46,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 59 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:55:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 13:55:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-12-14 13:55:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 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) [2022-12-14 13:55:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-12-14 13:55:46,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 6 [2022-12-14 13:55:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:46,802 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-12-14 13:55:46,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-12-14 13:55:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-12-14 13:55:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:55:46,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:46,802 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:46,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 13:55:47,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:47,004 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-12-14 13:55:47,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:47,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355346321] [2022-12-14 13:55:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:47,008 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 [2022-12-14 13:55:47,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:47,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:47,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:47,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:55:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:47,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:47,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355346321] [2022-12-14 13:55:47,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355346321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1024040066] [2022-12-14 13:55:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:47,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:55:47,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:55:47,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:55:47,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 13:55:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:47,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:55:47,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:47,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:47,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1024040066] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:47,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4971651] [2022-12-14 13:55:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:47,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:47,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:55:47,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:55:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:47,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:55:47,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:47,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:47,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4971651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:47,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:55:47,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 13:55:47,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778947995] [2022-12-14 13:55:47,427 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:55:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:55:47,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:55:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:55:47,429 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2022-12-14 13:55:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:47,495 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-12-14 13:55:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:55:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 10 [2022-12-14 13:55:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:47,497 INFO L225 Difference]: With dead ends: 75 [2022-12-14 13:55:47,497 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 13:55:47,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:55:47,497 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 191 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:47,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 135 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:55:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 13:55:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-12-14 13:55:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 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) [2022-12-14 13:55:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-12-14 13:55:47,501 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2022-12-14 13:55:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:47,501 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-12-14 13:55:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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) [2022-12-14 13:55:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-12-14 13:55:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:55:47,501 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:47,502 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:47,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:47,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:55:47,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 13:55:48,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:55:48,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:48,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-12-14 13:55:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:48,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013055627] [2022-12-14 13:55:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:48,108 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 [2022-12-14 13:55:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:48,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:48,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:48,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:55:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:48,178 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 8 treesize of output 7 [2022-12-14 13:55:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:48,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:48,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013055627] [2022-12-14 13:55:48,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013055627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [16751161] [2022-12-14 13:55:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:48,661 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:55:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:55:48,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:55:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 13:55:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:48,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:55:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:48,761 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 8 treesize of output 7 [2022-12-14 13:55:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:48,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:48,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [16751161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:48,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121793424] [2022-12-14 13:55:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:48,986 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:55:48,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:55:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:55:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:49,046 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 8 treesize of output 7 [2022-12-14 13:55:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:49,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:49,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121793424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:49,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:55:49,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-12-14 13:55:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41455144] [2022-12-14 13:55:49,237 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:55:49,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:55:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:55:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:55:49,238 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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) [2022-12-14 13:55:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:50,229 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-12-14 13:55:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 13:55:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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 10 [2022-12-14 13:55:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:50,231 INFO L225 Difference]: With dead ends: 116 [2022-12-14 13:55:50,231 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 13:55:50,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:55:50,232 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 396 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 149 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:55:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 13:55:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 58. [2022-12-14 13:55:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 57 states have internal predecessors, (65), 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) [2022-12-14 13:55:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-12-14 13:55:50,238 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 10 [2022-12-14 13:55:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:50,238 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-12-14 13:55:50,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 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) [2022-12-14 13:55:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-12-14 13:55:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:55:50,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:50,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:50,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:50,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:55:50,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:55:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:50,843 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash 363893229, now seen corresponding path program 1 times [2022-12-14 13:55:50,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:50,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905612459] [2022-12-14 13:55:50,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:50,846 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 [2022-12-14 13:55:50,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:50,848 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:50,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:55:50,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:50,983 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc9#1.base_11| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_11|)) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_11| (_ bv0 1)) |c_#valid|))) is different from true [2022-12-14 13:55:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:55:50,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:50,983 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:50,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905612459] [2022-12-14 13:55:50,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905612459] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:50,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:50,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:55:50,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207374870] [2022-12-14 13:55:50,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:50,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:55:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:50,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:55:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-12-14 13:55:50,985 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 13:55:51,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:51,055 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-12-14 13:55:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:55:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-12-14 13:55:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:51,058 INFO L225 Difference]: With dead ends: 57 [2022-12-14 13:55:51,058 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 13:55:51,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-12-14 13:55:51,059 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:51,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 50 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-12-14 13:55:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 13:55:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 13:55:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 54 states have internal predecessors, (62), 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) [2022-12-14 13:55:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-12-14 13:55:51,064 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 13 [2022-12-14 13:55:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:51,064 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-12-14 13:55:51,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 13:55:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-12-14 13:55:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:55:51,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:51,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:51,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:51,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:51,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash 363893953, now seen corresponding path program 1 times [2022-12-14 13:55:51,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:51,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399562269] [2022-12-14 13:55:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:51,267 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 [2022-12-14 13:55:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:51,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:51,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:51,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:55:51,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:55:51,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:51,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399562269] [2022-12-14 13:55:51,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399562269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:51,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:51,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:55:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670800467] [2022-12-14 13:55:51,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:51,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:55:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:51,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:55:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:55:51,359 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 13:55:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:51,400 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-12-14 13:55:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:55:51,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-12-14 13:55:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:51,401 INFO L225 Difference]: With dead ends: 57 [2022-12-14 13:55:51,401 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 13:55:51,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:55:51,402 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:51,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:55:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 13:55:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 13:55:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 48 states have internal predecessors, (55), 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) [2022-12-14 13:55:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-12-14 13:55:51,409 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 13 [2022-12-14 13:55:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:51,409 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-12-14 13:55:51,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 13:55:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-12-14 13:55:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:55:51,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:51,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:51,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:51,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:51,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958531, now seen corresponding path program 1 times [2022-12-14 13:55:51,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:51,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238905992] [2022-12-14 13:55:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:51,615 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 [2022-12-14 13:55:51,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:51,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:51,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:55:51,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:51,738 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 [2022-12-14 13:55:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:55:51,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:51,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:51,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238905992] [2022-12-14 13:55:51,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238905992] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:51,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:51,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:55:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551404704] [2022-12-14 13:55:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:55:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:55:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:55:51,757 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 13:55:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:51,835 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-12-14 13:55:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:55:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-12-14 13:55:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:51,836 INFO L225 Difference]: With dead ends: 43 [2022-12-14 13:55:51,836 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 13:55:51,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:55:51,837 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:51,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 23 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:55:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 13:55:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 13:55:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 states have internal predecessors, (49), 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) [2022-12-14 13:55:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-14 13:55:51,840 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 13 [2022-12-14 13:55:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:51,840 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-14 13:55:51,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-12-14 13:55:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-14 13:55:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:55:51,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:51,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:51,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-12-14 13:55:52,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:52,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958532, now seen corresponding path program 1 times [2022-12-14 13:55:52,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068306306] [2022-12-14 13:55:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:52,045 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 [2022-12-14 13:55:52,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:52,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:52,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:55:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:52,124 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 8 treesize of output 7 [2022-12-14 13:55:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:52,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:52,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068306306] [2022-12-14 13:55:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068306306] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 13:55:52,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:55:52,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-14 13:55:52,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289921842] [2022-12-14 13:55:52,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:55:52,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:55:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:55:52,566 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 13:55:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:52,817 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-12-14 13:55:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:55:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-12-14 13:55:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:52,818 INFO L225 Difference]: With dead ends: 51 [2022-12-14 13:55:52,818 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 13:55:52,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:55:52,819 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:52,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:55:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 13:55:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-12-14 13:55:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 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) [2022-12-14 13:55:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-12-14 13:55:52,823 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 13 [2022-12-14 13:55:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:52,823 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-12-14 13:55:52,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-12-14 13:55:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-12-14 13:55:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:55:52,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:52,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:52,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:53,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:53,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2022-12-14 13:55:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084184636] [2022-12-14 13:55:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:53,029 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 [2022-12-14 13:55:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:53,032 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:53,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:53,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:55:53,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:53,096 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 8 treesize of output 7 [2022-12-14 13:55:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:55:53,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:53,269 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084184636] [2022-12-14 13:55:53,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084184636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:53,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:53,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:55:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191393132] [2022-12-14 13:55:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:53,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:55:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:55:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:55:53,271 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-12-14 13:55:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:53,614 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-12-14 13:55:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:55:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2022-12-14 13:55:53,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:53,616 INFO L225 Difference]: With dead ends: 65 [2022-12-14 13:55:53,616 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 13:55:53,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:55:53,616 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:53,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 35 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:55:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 13:55:53,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-12-14 13:55:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 50 states have internal predecessors, (61), 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) [2022-12-14 13:55:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-12-14 13:55:53,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 13 [2022-12-14 13:55:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:53,620 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-12-14 13:55:53,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-12-14 13:55:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-12-14 13:55:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:55:53,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:53,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:53,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:53,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:53,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2022-12-14 13:55:53,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:53,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027496083] [2022-12-14 13:55:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:53,826 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 [2022-12-14 13:55:53,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:53,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:53,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 13:55:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:53,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:55:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:53,923 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 8 treesize of output 7 [2022-12-14 13:55:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:55:54,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:55:54,353 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027496083] [2022-12-14 13:55:54,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027496083] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:55:54,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:55:54,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:55:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430351090] [2022-12-14 13:55:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:55:54,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:55:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:55:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:55:54,355 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-12-14 13:55:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:55,194 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2022-12-14 13:55:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:55:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2022-12-14 13:55:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:55,196 INFO L225 Difference]: With dead ends: 78 [2022-12-14 13:55:55,196 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 13:55:55,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:55:55,196 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:55,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 51 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:55:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 13:55:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-12-14 13:55:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 61 states have internal predecessors, (75), 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) [2022-12-14 13:55:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-12-14 13:55:55,199 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 14 [2022-12-14 13:55:55,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:55,199 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-12-14 13:55:55,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-12-14 13:55:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-12-14 13:55:55,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 13:55:55,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:55,200 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:55:55,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 13:55:55,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:55:55,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash -511715546, now seen corresponding path program 1 times [2022-12-14 13:55:55,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:55,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812903132] [2022-12-14 13:55:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:55,402 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 [2022-12-14 13:55:55,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:55,404 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:55,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:55:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:55,528 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 8 treesize of output 7 [2022-12-14 13:55:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:55,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:56,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:55:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812903132] [2022-12-14 13:55:56,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812903132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:56,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511351896] [2022-12-14 13:55:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:56,774 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:55:56,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:55:56,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:55:56,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 13:55:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:55:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:55:57,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:57,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:55:57,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [511351896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901158984] [2022-12-14 13:55:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:55:57,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:55:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:55:57,550 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:55:57,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:55:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:55:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:55:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:57,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:55:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:57,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:55:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:55:57,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901158984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:55:57,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:55:57,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 7, 8, 9] total 26 [2022-12-14 13:55:57,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108347701] [2022-12-14 13:55:57,930 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:55:57,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:55:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:55:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:55:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:55:57,931 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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) [2022-12-14 13:55:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:55:59,258 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-12-14 13:55:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:55:59,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 18 [2022-12-14 13:55:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:55:59,260 INFO L225 Difference]: With dead ends: 64 [2022-12-14 13:55:59,260 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 13:55:59,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:55:59,261 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 114 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:55:59,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 159 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 13:55:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 13:55:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-14 13:55:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 61 states have internal predecessors, (74), 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) [2022-12-14 13:55:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-12-14 13:55:59,263 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2022-12-14 13:55:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:55:59,265 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-12-14 13:55:59,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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) [2022-12-14 13:55:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-12-14 13:55:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:55:59,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:55:59,266 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 13:55:59,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:55:59,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 13:55:59,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 13:55:59,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:55:59,869 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:55:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:55:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2022-12-14 13:55:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:55:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384890884] [2022-12-14 13:55:59,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:55:59,871 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 [2022-12-14 13:55:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:55:59,872 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:55:59,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:55:59,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:55:59,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:55:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:55:59,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:55:59,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:56:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:01,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:56:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384890884] [2022-12-14 13:56:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384890884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1983230506] [2022-12-14 13:56:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:56:01,296 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:56:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:56:01,297 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:56:01,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 13:56:01,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:56:01,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:01,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:56:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:01,392 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 8 treesize of output 7 [2022-12-14 13:56:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:01,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:01,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1983230506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191981507] [2022-12-14 13:56:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:56:01,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:56:01,987 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:56:01,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:56:02,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:56:02,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:56:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:02,059 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 8 treesize of output 7 [2022-12-14 13:56:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:02,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:04,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191981507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:04,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:56:04,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 25 [2022-12-14 13:56:04,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958011831] [2022-12-14 13:56:04,019 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:04,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:56:04,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:56:04,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:56:04,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:56:04,020 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 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) [2022-12-14 13:56:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:56:09,183 INFO L93 Difference]: Finished difference Result 359 states and 440 transitions. [2022-12-14 13:56:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:56:09,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 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 22 [2022-12-14 13:56:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:56:09,186 INFO L225 Difference]: With dead ends: 359 [2022-12-14 13:56:09,186 INFO L226 Difference]: Without dead ends: 359 [2022-12-14 13:56:09,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:56:09,186 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1091 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:56:09,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 298 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 13:56:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-12-14 13:56:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 86. [2022-12-14 13:56:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.3) internal successors, (104), 85 states have internal predecessors, (104), 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) [2022-12-14 13:56:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-12-14 13:56:09,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 22 [2022-12-14 13:56:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:56:09,190 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-12-14 13:56:09,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 26 states have internal predecessors, (66), 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) [2022-12-14 13:56:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-12-14 13:56:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:56:09,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:56:09,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:56:09,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:56:09,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 13:56:09,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 13:56:09,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:56:09,793 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:56:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:56:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1609243625, now seen corresponding path program 2 times [2022-12-14 13:56:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:56:09,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881659999] [2022-12-14 13:56:09,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:56:09,796 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 [2022-12-14 13:56:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:56:09,797 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:56:09,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:56:09,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:56:09,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:09,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:56:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:09,870 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 8 treesize of output 7 [2022-12-14 13:56:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:10,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:11,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:56:11,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881659999] [2022-12-14 13:56:11,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881659999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:11,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028434494] [2022-12-14 13:56:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:56:11,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:56:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:56:11,016 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:56:11,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 13:56:11,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:56:11,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:11,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:56:11,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:11,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:12,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028434494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:12,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390484284] [2022-12-14 13:56:12,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 13:56:12,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:56:12,231 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:56:12,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 13:56:12,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 13:56:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:56:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:56:12,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:12,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:56:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:12,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:12,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390484284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:12,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:56:12,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 8, 8] total 32 [2022-12-14 13:56:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208769761] [2022-12-14 13:56:12,823 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:56:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:56:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:56:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:56:12,825 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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) [2022-12-14 13:56:22,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:56:22,150 INFO L93 Difference]: Finished difference Result 224 states and 259 transitions. [2022-12-14 13:56:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 13:56:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 22 [2022-12-14 13:56:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:56:22,152 INFO L225 Difference]: With dead ends: 224 [2022-12-14 13:56:22,152 INFO L226 Difference]: Without dead ends: 224 [2022-12-14 13:56:22,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=838, Invalid=3718, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 13:56:22,153 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 926 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:56:22,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 127 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 13:56:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-14 13:56:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 156. [2022-12-14 13:56:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 155 states have internal predecessors, (199), 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) [2022-12-14 13:56:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2022-12-14 13:56:22,156 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 22 [2022-12-14 13:56:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:56:22,156 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2022-12-14 13:56:22,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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) [2022-12-14 13:56:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2022-12-14 13:56:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:56:22,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:56:22,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:56:22,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 13:56:22,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:56:22,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 13:56:22,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:22,759 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:56:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:56:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 294852956, now seen corresponding path program 1 times [2022-12-14 13:56:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:56:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144618459] [2022-12-14 13:56:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:22,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:56:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:56:22,765 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:56:22,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 13:56:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:56:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:22,867 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 8 treesize of output 7 [2022-12-14 13:56:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:23,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:24,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:56:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144618459] [2022-12-14 13:56:24,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144618459] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1393005692] [2022-12-14 13:56:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:24,185 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:56:24,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:56:24,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:56:24,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 13:56:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 13:56:24,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:24,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:56:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:24,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:56:25,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1393005692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:25,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554352429] [2022-12-14 13:56:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:25,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:25,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:56:25,939 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:56:25,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 13:56:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:56:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:26,009 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 8 treesize of output 7 [2022-12-14 13:56:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:26,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:26,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554352429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:26,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:56:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 6] total 26 [2022-12-14 13:56:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133894228] [2022-12-14 13:56:26,446 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:26,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:56:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:56:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:56:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:56:26,448 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-12-14 13:56:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:56:37,346 INFO L93 Difference]: Finished difference Result 282 states and 327 transitions. [2022-12-14 13:56:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 13:56:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 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 24 [2022-12-14 13:56:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:56:37,347 INFO L225 Difference]: With dead ends: 282 [2022-12-14 13:56:37,347 INFO L226 Difference]: Without dead ends: 282 [2022-12-14 13:56:37,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=883, Invalid=2777, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 13:56:37,348 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1059 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:56:37,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 152 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 13:56:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-14 13:56:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 128. [2022-12-14 13:56:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.2845528455284554) internal successors, (158), 127 states have internal predecessors, (158), 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) [2022-12-14 13:56:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2022-12-14 13:56:37,352 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 24 [2022-12-14 13:56:37,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:56:37,353 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2022-12-14 13:56:37,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 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) [2022-12-14 13:56:37,353 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2022-12-14 13:56:37,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 13:56:37,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:56:37,354 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 13:56:37,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 13:56:37,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-12-14 13:56:37,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 13:56:37,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 13:56:37,956 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:56:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:56:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1045063602, now seen corresponding path program 1 times [2022-12-14 13:56:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:56:37,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979489126] [2022-12-14 13:56:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:37,960 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 [2022-12-14 13:56:37,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:56:37,961 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:56:37,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:56:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:56:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:38,061 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 8 treesize of output 7 [2022-12-14 13:56:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:38,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:39,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:56:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979489126] [2022-12-14 13:56:39,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979489126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295420165] [2022-12-14 13:56:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:39,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:56:39,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:56:39,269 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:56:39,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 13:56:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:56:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:56:39,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:40,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:56:40,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295420165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:40,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594884451] [2022-12-14 13:56:40,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:56:40,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:56:40,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:56:40,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:56:40,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 13:56:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:56:40,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 13:56:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:56:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:40,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:56:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 13:56:41,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594884451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:56:41,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:56:41,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10, 9, 10, 8] total 40 [2022-12-14 13:56:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917499918] [2022-12-14 13:56:41,725 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:56:41,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 13:56:41,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:56:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 13:56:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:56:41,727 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 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) [2022-12-14 13:57:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:57:38,151 INFO L93 Difference]: Finished difference Result 390 states and 445 transitions. [2022-12-14 13:57:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-14 13:57:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 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 32 [2022-12-14 13:57:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:57:38,154 INFO L225 Difference]: With dead ends: 390 [2022-12-14 13:57:38,154 INFO L226 Difference]: Without dead ends: 348 [2022-12-14 13:57:38,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=3199, Invalid=16261, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 13:57:38,157 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1923 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1923 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:57:38,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1923 Valid, 396 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-14 13:57:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-12-14 13:57:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 175. [2022-12-14 13:57:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 174 states have internal predecessors, (220), 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) [2022-12-14 13:57:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 220 transitions. [2022-12-14 13:57:38,163 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 220 transitions. Word has length 32 [2022-12-14 13:57:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:57:38,163 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 220 transitions. [2022-12-14 13:57:38,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 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) [2022-12-14 13:57:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 220 transitions. [2022-12-14 13:57:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 13:57:38,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:57:38,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:57:38,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 13:57:38,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 13:57:38,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 13:57:38,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:57:38,766 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:57:38,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:57:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash 573737186, now seen corresponding path program 1 times [2022-12-14 13:57:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:57:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85647552] [2022-12-14 13:57:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:57:38,769 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 [2022-12-14 13:57:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:57:38,771 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:57:38,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:57:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:57:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:57:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:57:38,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:57:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:57:39,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:57:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:57:40,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:57:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85647552] [2022-12-14 13:57:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85647552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:57:40,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1459475639] [2022-12-14 13:57:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:57:40,880 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:57:40,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:57:40,881 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:57:40,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 13:57:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:57:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 13:57:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:57:41,090 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 8 treesize of output 7 [2022-12-14 13:57:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:57:42,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:57:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:57:44,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1459475639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:57:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76600533] [2022-12-14 13:57:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:57:44,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:57:44,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:57:44,239 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:57:44,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 13:57:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:57:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:57:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:57:44,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 13:57:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:57:44,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:57:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:57:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76600533] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:57:45,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:57:45,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 12, 11, 10, 9] total 35 [2022-12-14 13:57:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554349159] [2022-12-14 13:57:45,164 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:57:45,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 13:57:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:57:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 13:57:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 13:57:45,166 INFO L87 Difference]: Start difference. First operand 175 states and 220 transitions. Second operand has 36 states, 35 states have (on average 3.2) internal successors, (112), 36 states have internal predecessors, (112), 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) [2022-12-14 13:57:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:57:55,516 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2022-12-14 13:57:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 13:57:55,517 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 36 states have internal predecessors, (112), 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 40 [2022-12-14 13:57:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:57:55,518 INFO L225 Difference]: With dead ends: 320 [2022-12-14 13:57:55,518 INFO L226 Difference]: Without dead ends: 319 [2022-12-14 13:57:55,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1062, Invalid=3768, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:57:55,519 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 975 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 13:57:55,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 348 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 13:57:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-12-14 13:57:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 213. [2022-12-14 13:57:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.2740384615384615) internal successors, (265), 212 states have internal predecessors, (265), 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) [2022-12-14 13:57:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 265 transitions. [2022-12-14 13:57:55,524 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 265 transitions. Word has length 40 [2022-12-14 13:57:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:57:55,525 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 265 transitions. [2022-12-14 13:57:55,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2) internal successors, (112), 36 states have internal predecessors, (112), 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) [2022-12-14 13:57:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 265 transitions. [2022-12-14 13:57:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:57:55,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:57:55,526 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:57:55,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 13:57:55,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:57:55,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-12-14 13:57:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:57:56,129 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:57:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:57:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1927265964, now seen corresponding path program 3 times [2022-12-14 13:57:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:57:56,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528150844] [2022-12-14 13:57:56,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:57:56,133 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 [2022-12-14 13:57:56,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:57:56,134 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:57:56,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:57:56,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 13:57:56,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:57:56,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 13:57:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:57:56,358 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 8 treesize of output 7 [2022-12-14 13:57:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:57:56,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:58:01,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:58:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528150844] [2022-12-14 13:58:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528150844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:01,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [343924951] [2022-12-14 13:58:01,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:58:01,789 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:58:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:58:01,790 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:58:01,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 13:58:02,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 13:58:02,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 13:58:02,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:02,870 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 8 treesize of output 7 [2022-12-14 13:58:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:58:03,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:58:12,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [343924951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:12,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044543098] [2022-12-14 13:58:12,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:58:12,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:58:12,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:58:12,492 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:58:12,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 13:58:12,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 13:58:12,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:58:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:58:12,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:58:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:58:14,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:58:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:58:17,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044543098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:58:17,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 13:58:17,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 17, 19, 13, 12] total 70 [2022-12-14 13:58:17,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047036788] [2022-12-14 13:58:17,134 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 13:58:17,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 13:58:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 13:58:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 13:58:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4383, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 13:58:17,136 INFO L87 Difference]: Start difference. First operand 213 states and 265 transitions. Second operand has 70 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 70 states have internal predecessors, (180), 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) [2022-12-14 13:58:33,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:58:35,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 13:59:41,111 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 107 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:59:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:41,113 INFO L93 Difference]: Finished difference Result 401 states and 482 transitions. [2022-12-14 13:59:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 13:59:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 70 states have internal predecessors, (180), 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 41 [2022-12-14 13:59:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:41,114 INFO L225 Difference]: With dead ends: 401 [2022-12-14 13:59:41,114 INFO L226 Difference]: Without dead ends: 401 [2022-12-14 13:59:41,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=2652, Invalid=13604, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 13:59:41,116 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1716 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:41,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 472 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-12-14 13:59:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-12-14 13:59:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 215. [2022-12-14 13:59:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.2571428571428571) internal successors, (264), 214 states have internal predecessors, (264), 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) [2022-12-14 13:59:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 264 transitions. [2022-12-14 13:59:41,120 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 264 transitions. Word has length 41 [2022-12-14 13:59:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:41,120 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 264 transitions. [2022-12-14 13:59:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.5714285714285716) internal successors, (180), 70 states have internal predecessors, (180), 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) [2022-12-14 13:59:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 264 transitions. [2022-12-14 13:59:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 13:59:41,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:41,120 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 13:59:41,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-14 13:59:41,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 13:59:41,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-12-14 13:59:41,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 13:59:41,723 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 13:59:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2022-12-14 13:59:41,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 13:59:41,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208947300] [2022-12-14 13:59:41,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:59:41,725 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 [2022-12-14 13:59:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 13:59:41,727 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 13:59:41,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 13:59:41,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 13:59:41,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 13:59:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:42,006 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 8 treesize of output 7 [2022-12-14 13:59:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:59:42,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:59:45,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 13:59:45,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208947300] [2022-12-14 13:59:45,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208947300] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:45,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [440792380] [2022-12-14 13:59:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:59:45,736 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 13:59:45,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 13:59:45,737 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 13:59:45,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 13:59:46,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 13:59:46,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:46,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:59:46,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:46,388 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 8 treesize of output 7 [2022-12-14 13:59:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:59:47,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:59:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:59:56,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [440792380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:59:56,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267732063] [2022-12-14 13:59:56,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:59:56,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:56,266 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:56,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 13:59:59,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 13:59:59,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:59,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:59:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:59,345 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 8 treesize of output 7 [2022-12-14 14:00:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:00:00,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:00:06,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267732063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:06,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:00:06,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 67 [2022-12-14 14:00:06,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320276748] [2022-12-14 14:00:06,591 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:00:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 14:00:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:00:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 14:00:06,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=3331, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 14:00:06,594 INFO L87 Difference]: Start difference. First operand 215 states and 264 transitions. Second operand has 68 states, 67 states have (on average 3.014925373134328) internal successors, (202), 68 states have internal predecessors, (202), 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) [2022-12-14 14:00:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:37,622 INFO L93 Difference]: Finished difference Result 2464 states and 3106 transitions. [2022-12-14 14:00:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 14:00:37,624 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.014925373134328) internal successors, (202), 68 states have internal predecessors, (202), 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 46 [2022-12-14 14:00:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:37,637 INFO L225 Difference]: With dead ends: 2464 [2022-12-14 14:00:37,637 INFO L226 Difference]: Without dead ends: 2464 [2022-12-14 14:00:37,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 198 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3773 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=2618, Invalid=6502, Unknown=0, NotChecked=0, Total=9120 [2022-12-14 14:00:37,639 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 4077 mSDsluCounter, 1538 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:37,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4077 Valid, 1625 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-12-14 14:00:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-12-14 14:00:37,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 263. [2022-12-14 14:00:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.255813953488372) internal successors, (324), 262 states have internal predecessors, (324), 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) [2022-12-14 14:00:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 324 transitions. [2022-12-14 14:00:37,660 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 324 transitions. Word has length 46 [2022-12-14 14:00:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:37,661 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 324 transitions. [2022-12-14 14:00:37,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.014925373134328) internal successors, (202), 68 states have internal predecessors, (202), 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) [2022-12-14 14:00:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 324 transitions. [2022-12-14 14:00:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:00:37,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:37,662 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:00:37,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 14:00:37,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-12-14 14:00:38,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-14 14:00:38,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:38,263 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 14:00:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 387622886, now seen corresponding path program 4 times [2022-12-14 14:00:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:00:38,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495520634] [2022-12-14 14:00:38,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:00:38,266 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 [2022-12-14 14:00:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:00:38,269 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 14:00:38,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-14 14:00:38,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:00:38,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:00:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:00:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:38,409 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 8 treesize of output 7 [2022-12-14 14:00:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:00:39,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:00:42,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:00:42,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495520634] [2022-12-14 14:00:42,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495520634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:42,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929030260] [2022-12-14 14:00:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:00:42,493 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:00:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:00:42,494 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:00:42,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-14 14:00:42,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:00:42,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:00:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 14:00:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:00:44,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:00:46,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1929030260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:46,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411784241] [2022-12-14 14:00:46,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:00:46,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:46,154 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:46,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 14:00:46,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:00:46,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:00:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 14:00:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:46,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 14:00:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:00:47,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:00:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:00:52,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411784241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:00:52,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:00:52,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17, 16, 12, 12] total 74 [2022-12-14 14:00:52,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33090196] [2022-12-14 14:00:52,124 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:00:52,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-14 14:00:52,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:00:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-14 14:00:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=4854, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 14:00:52,126 INFO L87 Difference]: Start difference. First operand 263 states and 324 transitions. Second operand has 74 states, 74 states have (on average 3.22972972972973) internal successors, (239), 74 states have internal predecessors, (239), 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) [2022-12-14 14:01:03,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:05,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:16,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:17,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:38,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:40,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:53,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:01:55,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:02:36,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 14:03:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:03:15,961 INFO L93 Difference]: Finished difference Result 798 states and 948 transitions. [2022-12-14 14:03:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-12-14 14:03:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.22972972972973) internal successors, (239), 74 states have internal predecessors, (239), 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 49 [2022-12-14 14:03:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:03:15,964 INFO L225 Difference]: With dead ends: 798 [2022-12-14 14:03:15,964 INFO L226 Difference]: Without dead ends: 798 [2022-12-14 14:03:15,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13803 ImplicationChecksByTransitivity, 119.6s TimeCoverageRelationStatistics Valid=6502, Invalid=39938, Unknown=0, NotChecked=0, Total=46440 [2022-12-14 14:03:15,968 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5750 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 4533 mSolverCounterSat, 148 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5750 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 4533 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:03:15,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5750 Valid, 1047 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 4533 Invalid, 7 Unknown, 0 Unchecked, 33.5s Time] [2022-12-14 14:03:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-12-14 14:03:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 365. [2022-12-14 14:03:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.2694444444444444) internal successors, (457), 364 states have internal predecessors, (457), 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) [2022-12-14 14:03:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 457 transitions. [2022-12-14 14:03:15,975 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 457 transitions. Word has length 49 [2022-12-14 14:03:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:03:15,975 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 457 transitions. [2022-12-14 14:03:15,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.22972972972973) internal successors, (239), 74 states have internal predecessors, (239), 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) [2022-12-14 14:03:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 457 transitions. [2022-12-14 14:03:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:03:15,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:03:15,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:03:15,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-12-14 14:03:16,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-12-14 14:03:16,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 14:03:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:03:16,578 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 14:03:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:03:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash -568751298, now seen corresponding path program 1 times [2022-12-14 14:03:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:03:16,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983481603] [2022-12-14 14:03:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:03:16,581 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 [2022-12-14 14:03:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:03:16,583 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 14:03:16,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 14:03:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:03:16,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 14:03:16,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:03:16,784 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 8 treesize of output 7 [2022-12-14 14:03:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:03:17,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:03:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:03:19,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:03:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983481603] [2022-12-14 14:03:19,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983481603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:03:19,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619520721] [2022-12-14 14:03:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:03:19,070 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:03:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:03:19,070 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:03:19,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 14:03:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:03:19,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 14:03:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:03:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:03:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:03:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:03:21,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [619520721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:03:21,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618132664] [2022-12-14 14:03:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:03:21,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:03:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:03:21,528 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:03:21,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 14:03:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:03:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 14:03:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:03:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:03:22,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:03:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:03:23,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618132664] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:03:23,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:03:23,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13, 12, 12, 10] total 50 [2022-12-14 14:03:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556996895] [2022-12-14 14:03:23,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:03:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 14:03:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:03:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 14:03:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 14:03:23,538 INFO L87 Difference]: Start difference. First operand 365 states and 457 transitions. Second operand has 50 states, 50 states have (on average 3.8) internal successors, (190), 50 states have internal predecessors, (190), 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) [2022-12-14 14:04:12,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:13,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:21,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:23,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:31,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:39,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:44,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:52,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:56,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:04:57,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:05:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:03,675 INFO L93 Difference]: Finished difference Result 776 states and 913 transitions. [2022-12-14 14:05:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-12-14 14:05:03,676 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.8) internal successors, (190), 50 states have internal predecessors, (190), 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 49 [2022-12-14 14:05:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:03,677 INFO L225 Difference]: With dead ends: 776 [2022-12-14 14:05:03,677 INFO L226 Difference]: Without dead ends: 776 [2022-12-14 14:05:03,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17887 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=7561, Invalid=40181, Unknown=0, NotChecked=0, Total=47742 [2022-12-14 14:05:03,680 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4681 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4681 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 2549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:03,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4681 Valid, 587 Invalid, 2549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 25.3s Time] [2022-12-14 14:05:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-12-14 14:05:03,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 487. [2022-12-14 14:05:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 482 states have (on average 1.2634854771784232) internal successors, (609), 486 states have internal predecessors, (609), 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) [2022-12-14 14:05:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 609 transitions. [2022-12-14 14:05:03,686 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 609 transitions. Word has length 49 [2022-12-14 14:05:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:03,686 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 609 transitions. [2022-12-14 14:05:03,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.8) internal successors, (190), 50 states have internal predecessors, (190), 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) [2022-12-14 14:05:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 609 transitions. [2022-12-14 14:05:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 14:05:03,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:03,687 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:05:03,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-12-14 14:05:03,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 14:05:04,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-14 14:05:04,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:04,290 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 14:05:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:04,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1977203912, now seen corresponding path program 2 times [2022-12-14 14:05:04,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:05:04,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625316307] [2022-12-14 14:05:04,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:05:04,293 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 [2022-12-14 14:05:04,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:05:04,295 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 14:05:04,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 14:05:04,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 14:05:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:05:04,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:05:04,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:04,401 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 8 treesize of output 7 [2022-12-14 14:05:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 14:05:05,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:05:05,060 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:05:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625316307] [2022-12-14 14:05:05,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625316307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:05,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:05:05,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:05:05,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915588801] [2022-12-14 14:05:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:05:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:05:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:05:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:05:05,061 INFO L87 Difference]: Start difference. First operand 487 states and 609 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-12-14 14:05:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:05,290 INFO L93 Difference]: Finished difference Result 480 states and 591 transitions. [2022-12-14 14:05:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:05:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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 63 [2022-12-14 14:05:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:05,292 INFO L225 Difference]: With dead ends: 480 [2022-12-14 14:05:05,292 INFO L226 Difference]: Without dead ends: 426 [2022-12-14 14:05:05,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:05:05,292 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 64 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:05,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 18 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-12-14 14:05:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 354. [2022-12-14 14:05:05,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.262857142857143) internal successors, (442), 353 states have internal predecessors, (442), 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) [2022-12-14 14:05:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 442 transitions. [2022-12-14 14:05:05,298 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 442 transitions. Word has length 63 [2022-12-14 14:05:05,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:05,298 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 442 transitions. [2022-12-14 14:05:05,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 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) [2022-12-14 14:05:05,298 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 442 transitions. [2022-12-14 14:05:05,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:05:05,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:05,299 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:05:05,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-12-14 14:05:05,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:05:05,502 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 14:05:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1283272503, now seen corresponding path program 2 times [2022-12-14 14:05:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:05:05,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534177815] [2022-12-14 14:05:05,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:05:05,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:05:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:05:05,504 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 14:05:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 14:05:05,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:05:05,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:05:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 14:05:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:05,738 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 8 treesize of output 7 [2022-12-14 14:05:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:05:06,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 2 proven. 103 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:05:09,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:05:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534177815] [2022-12-14 14:05:09,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534177815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1882994679] [2022-12-14 14:05:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:05:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:05:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:05:09,931 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:05:09,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 14:05:10,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:05:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:05:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:05:10,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:05:11,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:05:13,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1882994679] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:13,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219877622] [2022-12-14 14:05:13,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:05:13,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:13,229 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:05:13,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 14:05:13,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:05:13,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:05:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 14:05:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:13,416 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 8 treesize of output 7 [2022-12-14 14:05:14,505 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 26 treesize of output 20 [2022-12-14 14:05:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:05:14,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:05:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 71 proven. 22 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:05:16,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219877622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:05:16,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:05:16,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 15, 14, 19, 11] total 58 [2022-12-14 14:05:16,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189730815] [2022-12-14 14:05:16,741 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:05:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 14:05:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:05:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 14:05:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2872, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 14:05:16,743 INFO L87 Difference]: Start difference. First operand 354 states and 442 transitions. Second operand has 58 states, 58 states have (on average 4.448275862068965) internal successors, (258), 58 states have internal predecessors, (258), 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) [2022-12-14 14:07:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:30,631 INFO L93 Difference]: Finished difference Result 923 states and 1136 transitions. [2022-12-14 14:07:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-12-14 14:07:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.448275862068965) internal successors, (258), 58 states have internal predecessors, (258), 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 73 [2022-12-14 14:07:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:30,632 INFO L225 Difference]: With dead ends: 923 [2022-12-14 14:07:30,632 INFO L226 Difference]: Without dead ends: 838 [2022-12-14 14:07:30,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 414 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14380 ImplicationChecksByTransitivity, 127.7s TimeCoverageRelationStatistics Valid=5235, Invalid=34965, Unknown=0, NotChecked=0, Total=40200 [2022-12-14 14:07:30,639 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3433 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1870 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3433 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:30,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3433 Valid, 425 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1870 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-12-14 14:07:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-12-14 14:07:30,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 621. [2022-12-14 14:07:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 617 states have (on average 1.3014586709886549) internal successors, (803), 620 states have internal predecessors, (803), 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) [2022-12-14 14:07:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 803 transitions. [2022-12-14 14:07:30,647 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 803 transitions. Word has length 73 [2022-12-14 14:07:30,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:30,647 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 803 transitions. [2022-12-14 14:07:30,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.448275862068965) internal successors, (258), 58 states have internal predecessors, (258), 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) [2022-12-14 14:07:30,647 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 803 transitions. [2022-12-14 14:07:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 14:07:30,648 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:30,648 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:30,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 14:07:30,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 14:07:31,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-12-14 14:07:31,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:07:31,250 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 14:07:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash -88818695, now seen corresponding path program 3 times [2022-12-14 14:07:31,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:07:31,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674901645] [2022-12-14 14:07:31,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:07:31,259 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 [2022-12-14 14:07:31,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:07:31,260 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 14:07:31,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 14:07:31,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:07:31,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:07:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:07:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:31,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 14:07:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 14:07:32,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:07:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 14:07:35,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:07:35,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674901645] [2022-12-14 14:07:35,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674901645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:07:35,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2121390999] [2022-12-14 14:07:35,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:07:35,193 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:07:35,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:07:35,194 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:07:35,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 14:07:35,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:07:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:07:35,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:07:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:35,743 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 8 treesize of output 7 [2022-12-14 14:07:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 14:07:36,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:07:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 14:07:39,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2121390999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:07:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262954254] [2022-12-14 14:07:39,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:07:39,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:07:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:07:39,756 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:07:39,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 14:07:40,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:07:40,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:07:40,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:07:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:40,140 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 8 treesize of output 7 [2022-12-14 14:07:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 14:07:40,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:07:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 14:07:43,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262954254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:07:43,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:07:43,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 24 [2022-12-14 14:07:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099935979] [2022-12-14 14:07:43,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:07:43,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 14:07:43,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:07:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 14:07:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 14:07:43,104 INFO L87 Difference]: Start difference. First operand 621 states and 803 transitions. Second operand has 25 states, 24 states have (on average 4.208333333333333) internal successors, (101), 25 states have internal predecessors, (101), 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) [2022-12-14 14:07:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:07:57,568 INFO L93 Difference]: Finished difference Result 646 states and 821 transitions. [2022-12-14 14:07:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 14:07:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.208333333333333) internal successors, (101), 25 states have internal predecessors, (101), 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 77 [2022-12-14 14:07:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:07:57,571 INFO L225 Difference]: With dead ends: 646 [2022-12-14 14:07:57,571 INFO L226 Difference]: Without dead ends: 646 [2022-12-14 14:07:57,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 431 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 14:07:57,571 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 585 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:07:57,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 139 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 14:07:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-12-14 14:07:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 626. [2022-12-14 14:07:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 622 states have (on average 1.2942122186495177) internal successors, (805), 625 states have internal predecessors, (805), 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) [2022-12-14 14:07:57,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 805 transitions. [2022-12-14 14:07:57,577 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 805 transitions. Word has length 77 [2022-12-14 14:07:57,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:07:57,577 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 805 transitions. [2022-12-14 14:07:57,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.208333333333333) internal successors, (101), 25 states have internal predecessors, (101), 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) [2022-12-14 14:07:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 805 transitions. [2022-12-14 14:07:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 14:07:57,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:07:57,578 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:07:57,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-12-14 14:07:57,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 14:07:57,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 14:07:58,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 14:07:58,181 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-14 14:07:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:07:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1750042493, now seen corresponding path program 5 times [2022-12-14 14:07:58,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:07:58,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180988478] [2022-12-14 14:07:58,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 14:07:58,183 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 [2022-12-14 14:07:58,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:07:58,186 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -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) [2022-12-14 14:07:58,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 14:07:58,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-14 14:07:58,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:07:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 14:07:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:07:58,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 14:07:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 128 proven. 153 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:07:59,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:08:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:08:06,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:08:06,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180988478] [2022-12-14 14:08:06,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180988478] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:08:06,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151454854] [2022-12-14 14:08:06,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 14:08:06,333 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:08:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:08:06,334 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:08:06,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b64b37-37aa-4907-af72-705d6b55c8d8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process