./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-queue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9a441ad5f70efa202eb02609b90cbc83f5bf4487618c2a09bffcfe320d65f90 --- 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-8393723 [2022-11-18 20:55:18,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:55:18,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:55:18,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:55:18,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:55:18,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:55:18,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:55:18,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:55:18,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:55:18,554 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:55:18,555 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:55:18,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:55:18,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:55:18,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:55:18,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:55:18,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:55:18,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:55:18,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:55:18,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:55:18,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:55:18,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:55:18,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:55:18,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:55:18,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:55:18,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:55:18,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:55:18,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:55:18,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:55:18,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:55:18,592 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:55:18,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:55:18,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:55:18,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:55:18,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:55:18,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:55:18,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:55:18,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:55:18,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:55:18,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:55:18,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:55:18,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:55:18,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:55:18,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:55:18,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:55:18,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:55:18,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:55:18,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:55:18,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:55:18,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:55:18,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:55:18,660 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:55:18,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:55:18,661 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:55:18,662 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:55:18,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:55:18,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:55:18,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:55:18,662 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:55:18,663 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:55:18,663 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:55:18,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:55:18,663 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:55:18,664 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:55:18,664 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:55:18,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:55:18,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:55:18,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:55:18,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:55:18,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:55:18,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:55:18,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:55:18,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:55:18,666 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_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9a441ad5f70efa202eb02609b90cbc83f5bf4487618c2a09bffcfe320d65f90 [2022-11-18 20:55:19,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:55:19,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:55:19,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:55:19,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:55:19,108 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:55:19,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/forester-heap/sll-queue-1.i [2022-11-18 20:55:19,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/data/9d67f51fd/1a435bf3bc76400fa86292d1dd0ea3ee/FLAG21cfd2ace [2022-11-18 20:55:19,821 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:55:19,821 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i [2022-11-18 20:55:19,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/data/9d67f51fd/1a435bf3bc76400fa86292d1dd0ea3ee/FLAG21cfd2ace [2022-11-18 20:55:20,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/data/9d67f51fd/1a435bf3bc76400fa86292d1dd0ea3ee [2022-11-18 20:55:20,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:55:20,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:55:20,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:55:20,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:55:20,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:55:20,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612bb8a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20, skipping insertion in model container [2022-11-18 20:55:20,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:55:20,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:55:20,635 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22387,22400] [2022-11-18 20:55:20,643 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22458,22471] [2022-11-18 20:55:20,644 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22532,22545] [2022-11-18 20:55:20,647 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22624,22637] [2022-11-18 20:55:20,650 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22701,22714] [2022-11-18 20:55:20,652 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22796,22809] [2022-11-18 20:55:20,654 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22873,22886] [2022-11-18 20:55:20,656 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22956,22969] [2022-11-18 20:55:20,659 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23051,23064] [2022-11-18 20:55:20,661 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23128,23141] [2022-11-18 20:55:20,663 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23211,23224] [2022-11-18 20:55:20,665 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23300,23313] [2022-11-18 20:55:20,669 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23386,23399] [2022-11-18 20:55:20,672 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23532,23545] [2022-11-18 20:55:20,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:55:20,696 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:55:20,744 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22387,22400] [2022-11-18 20:55:20,745 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22458,22471] [2022-11-18 20:55:20,746 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22532,22545] [2022-11-18 20:55:20,747 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22624,22637] [2022-11-18 20:55:20,748 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22701,22714] [2022-11-18 20:55:20,749 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22796,22809] [2022-11-18 20:55:20,750 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22873,22886] [2022-11-18 20:55:20,751 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[22956,22969] [2022-11-18 20:55:20,752 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23051,23064] [2022-11-18 20:55:20,753 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23128,23141] [2022-11-18 20:55:20,754 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23211,23224] [2022-11-18 20:55:20,760 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23300,23313] [2022-11-18 20:55:20,762 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23386,23399] [2022-11-18 20:55:20,769 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/sv-benchmarks/c/forester-heap/sll-queue-1.i[23532,23545] [2022-11-18 20:55:20,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:55:20,807 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:55:20,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20 WrapperNode [2022-11-18 20:55:20,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:55:20,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:55:20,809 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:55:20,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:55:20,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,856 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 222 [2022-11-18 20:55:20,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:55:20,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:55:20,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:55:20,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:55:20,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:55:20,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:55:20,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:55:20,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:55:20,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (1/1) ... [2022-11-18 20:55:20,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:55:20,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:20,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:55:20,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:55:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:55:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:55:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:55:20,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:55:21,156 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:55:21,159 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:55:21,804 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:55:21,817 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:55:21,819 INFO L300 CfgBuilder]: Removed 31 assume(true) statements. [2022-11-18 20:55:21,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:55:21 BoogieIcfgContainer [2022-11-18 20:55:21,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:55:21,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:55:21,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:55:21,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:55:21,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:55:20" (1/3) ... [2022-11-18 20:55:21,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b3450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:55:21, skipping insertion in model container [2022-11-18 20:55:21,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:55:20" (2/3) ... [2022-11-18 20:55:21,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b3450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:55:21, skipping insertion in model container [2022-11-18 20:55:21,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:55:21" (3/3) ... [2022-11-18 20:55:21,839 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-queue-1.i [2022-11-18 20:55:21,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:55:21,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2022-11-18 20:55:21,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:55:21,952 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;@6640663c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:55:21,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-11-18 20:55:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 100 states have (on average 2.26) internal successors, (226), 170 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:55:21,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:21,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:55:21,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-11-18 20:55:21,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:21,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562651776] [2022-11-18 20:55:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:21,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:22,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562651776] [2022-11-18 20:55:22,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562651776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:22,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:22,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:22,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557487883] [2022-11-18 20:55:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:22,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:22,303 INFO L87 Difference]: Start difference. First operand has 171 states, 100 states have (on average 2.26) internal successors, (226), 170 states have internal predecessors, (226), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:22,567 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2022-11-18 20:55:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:22,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2022-11-18 20:55:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:22,597 INFO L225 Difference]: With dead ends: 169 [2022-11-18 20:55:22,597 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:55:22,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:22,615 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 160 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:22,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 109 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:55:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:55:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-11-18 20:55:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 101 states have (on average 1.7128712871287128) internal successors, (173), 160 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 173 transitions. [2022-11-18 20:55:22,740 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 173 transitions. Word has length 3 [2022-11-18 20:55:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:22,740 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 173 transitions. [2022-11-18 20:55:22,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:22,741 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 173 transitions. [2022-11-18 20:55:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:55:22,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:22,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:55:22,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:55:22,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-11-18 20:55:22,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114084264] [2022-11-18 20:55:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:22,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:22,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114084264] [2022-11-18 20:55:22,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114084264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:22,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:22,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:55:22,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387008540] [2022-11-18 20:55:22,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:22,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:22,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:22,876 INFO L87 Difference]: Start difference. First operand 161 states and 173 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:23,048 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2022-11-18 20:55:23,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2022-11-18 20:55:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:23,051 INFO L225 Difference]: With dead ends: 155 [2022-11-18 20:55:23,051 INFO L226 Difference]: Without dead ends: 155 [2022-11-18 20:55:23,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:23,053 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 147 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:23,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 112 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:55:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-18 20:55:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-11-18 20:55:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 101 states have (on average 1.603960396039604) internal successors, (162), 150 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2022-11-18 20:55:23,068 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 3 [2022-11-18 20:55:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:23,069 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2022-11-18 20:55:23,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2022-11-18 20:55:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:55:23,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:23,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:23,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:55:23,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2022-11-18 20:55:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:23,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942765545] [2022-11-18 20:55:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:23,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:23,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942765545] [2022-11-18 20:55:23,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942765545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:23,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:23,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925020929] [2022-11-18 20:55:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:23,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:55:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:55:23,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:55:23,351 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:23,574 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-11-18 20:55:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:23,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-11-18 20:55:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:23,580 INFO L225 Difference]: With dead ends: 161 [2022-11-18 20:55:23,580 INFO L226 Difference]: Without dead ends: 161 [2022-11-18 20:55:23,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:23,582 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 260 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:23,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 116 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:55:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-18 20:55:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2022-11-18 20:55:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 108 states have (on average 1.5555555555555556) internal successors, (168), 152 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 168 transitions. [2022-11-18 20:55:23,609 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 168 transitions. Word has length 8 [2022-11-18 20:55:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:23,609 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 168 transitions. [2022-11-18 20:55:23,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 168 transitions. [2022-11-18 20:55:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:55:23,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:23,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:23,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:55:23,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2022-11-18 20:55:23,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:23,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236816250] [2022-11-18 20:55:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:23,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:23,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236816250] [2022-11-18 20:55:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236816250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:23,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:23,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:23,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933614473] [2022-11-18 20:55:23,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:55:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:55:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:55:23,970 INFO L87 Difference]: Start difference. First operand 153 states and 168 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:24,232 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2022-11-18 20:55:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2022-11-18 20:55:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:24,235 INFO L225 Difference]: With dead ends: 244 [2022-11-18 20:55:24,235 INFO L226 Difference]: Without dead ends: 244 [2022-11-18 20:55:24,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:24,239 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 318 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:24,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 184 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:55:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-18 20:55:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 158. [2022-11-18 20:55:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 113 states have (on average 1.5309734513274336) internal successors, (173), 157 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2022-11-18 20:55:24,260 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 8 [2022-11-18 20:55:24,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:24,261 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2022-11-18 20:55:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,261 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2022-11-18 20:55:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:55:24,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:24,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:55:24,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1837174119, now seen corresponding path program 1 times [2022-11-18 20:55:24,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634243449] [2022-11-18 20:55:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:24,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:24,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634243449] [2022-11-18 20:55:24,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634243449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:24,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:24,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:24,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284615210] [2022-11-18 20:55:24,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:24,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:24,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:24,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:24,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:24,336 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:24,382 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-11-18 20:55:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:24,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-11-18 20:55:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:24,384 INFO L225 Difference]: With dead ends: 148 [2022-11-18 20:55:24,385 INFO L226 Difference]: Without dead ends: 148 [2022-11-18 20:55:24,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:24,387 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 125 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:24,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 135 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:55:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-18 20:55:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-18 20:55:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.5) internal successors, (162), 147 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2022-11-18 20:55:24,407 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 9 [2022-11-18 20:55:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:24,408 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2022-11-18 20:55:24,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2022-11-18 20:55:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:55:24,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:24,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:55:24,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,410 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2022-11-18 20:55:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112011307] [2022-11-18 20:55:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:24,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112011307] [2022-11-18 20:55:24,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112011307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:24,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:24,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:55:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568321373] [2022-11-18 20:55:24,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:24,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:55:24,622 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:24,935 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2022-11-18 20:55:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:55:24,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2022-11-18 20:55:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:24,936 INFO L225 Difference]: With dead ends: 219 [2022-11-18 20:55:24,937 INFO L226 Difference]: Without dead ends: 219 [2022-11-18 20:55:24,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:55:24,938 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 110 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:24,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 682 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:55:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-18 20:55:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2022-11-18 20:55:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 146 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2022-11-18 20:55:24,945 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 12 [2022-11-18 20:55:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:24,947 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2022-11-18 20:55:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2022-11-18 20:55:24,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:55:24,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:24,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:55:24,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2022-11-18 20:55:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:24,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450801535] [2022-11-18 20:55:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:25,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:25,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450801535] [2022-11-18 20:55:25,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450801535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:25,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:25,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:55:25,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564399109] [2022-11-18 20:55:25,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:55:25,281 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:25,686 INFO L93 Difference]: Finished difference Result 211 states and 228 transitions. [2022-11-18 20:55:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:55:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2022-11-18 20:55:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:25,688 INFO L225 Difference]: With dead ends: 211 [2022-11-18 20:55:25,688 INFO L226 Difference]: Without dead ends: 211 [2022-11-18 20:55:25,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:55:25,689 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 97 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:25,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 676 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:55:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-18 20:55:25,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2022-11-18 20:55:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 135 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 149 transitions. [2022-11-18 20:55:25,693 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 149 transitions. Word has length 12 [2022-11-18 20:55:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:25,693 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 149 transitions. [2022-11-18 20:55:25,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 149 transitions. [2022-11-18 20:55:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:55:25,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:25,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:25,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:55:25,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1603335132, now seen corresponding path program 1 times [2022-11-18 20:55:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:25,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555894641] [2022-11-18 20:55:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:25,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:25,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555894641] [2022-11-18 20:55:25,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555894641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:25,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:25,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:25,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448440796] [2022-11-18 20:55:25,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:25,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:25,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:25,732 INFO L87 Difference]: Start difference. First operand 136 states and 149 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:25,762 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2022-11-18 20:55:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 15 [2022-11-18 20:55:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:25,763 INFO L225 Difference]: With dead ends: 191 [2022-11-18 20:55:25,763 INFO L226 Difference]: Without dead ends: 191 [2022-11-18 20:55:25,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:25,765 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 47 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:25,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 250 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:55:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-18 20:55:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2022-11-18 20:55:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 116 states have (on average 1.4051724137931034) internal successors, (163), 148 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 163 transitions. [2022-11-18 20:55:25,770 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 163 transitions. Word has length 15 [2022-11-18 20:55:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:25,770 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 163 transitions. [2022-11-18 20:55:25,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 163 transitions. [2022-11-18 20:55:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:55:25,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:25,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:25,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:55:25,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -775737061, now seen corresponding path program 1 times [2022-11-18 20:55:25,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:25,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167074152] [2022-11-18 20:55:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:25,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:25,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167074152] [2022-11-18 20:55:25,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167074152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:25,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:25,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:55:25,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702864564] [2022-11-18 20:55:25,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:55:25,895 INFO L87 Difference]: Start difference. First operand 149 states and 163 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:26,082 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2022-11-18 20:55:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:55:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 19 [2022-11-18 20:55:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:26,084 INFO L225 Difference]: With dead ends: 149 [2022-11-18 20:55:26,084 INFO L226 Difference]: Without dead ends: 149 [2022-11-18 20:55:26,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:55:26,086 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 90 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:26,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 541 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:55:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-18 20:55:26,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2022-11-18 20:55:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 115 states have (on average 1.4) internal successors, (161), 146 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2022-11-18 20:55:26,091 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 19 [2022-11-18 20:55:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:26,091 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2022-11-18 20:55:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2022-11-18 20:55:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:55:26,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:26,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:26,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:55:26,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:26,094 INFO L85 PathProgramCache]: Analyzing trace with hash 73317399, now seen corresponding path program 1 times [2022-11-18 20:55:26,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:26,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361940790] [2022-11-18 20:55:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:26,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361940790] [2022-11-18 20:55:26,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361940790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:26,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:26,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:55:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634273099] [2022-11-18 20:55:26,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:26,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:26,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:55:26,352 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:26,512 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2022-11-18 20:55:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:55:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2022-11-18 20:55:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:26,514 INFO L225 Difference]: With dead ends: 156 [2022-11-18 20:55:26,514 INFO L226 Difference]: Without dead ends: 156 [2022-11-18 20:55:26,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:55:26,515 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 12 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:26,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 572 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:55:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-18 20:55:26,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-11-18 20:55:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.3833333333333333) internal successors, (166), 151 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-11-18 20:55:26,521 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 20 [2022-11-18 20:55:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:26,522 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-11-18 20:55:26,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-11-18 20:55:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 20:55:26,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:26,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:26,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:55:26,525 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -800612379, now seen corresponding path program 1 times [2022-11-18 20:55:26,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243256200] [2022-11-18 20:55:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:26,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:26,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243256200] [2022-11-18 20:55:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243256200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:26,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:26,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:55:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504981843] [2022-11-18 20:55:26,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:26,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:55:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:55:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:26,625 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:26,760 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-11-18 20:55:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 [2022-11-18 20:55:26,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:26,762 INFO L225 Difference]: With dead ends: 152 [2022-11-18 20:55:26,762 INFO L226 Difference]: Without dead ends: 152 [2022-11-18 20:55:26,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:26,764 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 125 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:26,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 296 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:55:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-18 20:55:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-18 20:55:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.375) internal successors, (165), 151 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-11-18 20:55:26,770 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 22 [2022-11-18 20:55:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:26,770 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-11-18 20:55:26,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-11-18 20:55:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:55:26,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:26,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:55:26,776 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:26,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1089542561, now seen corresponding path program 1 times [2022-11-18 20:55:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:26,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10121807] [2022-11-18 20:55:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:26,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:26,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10121807] [2022-11-18 20:55:26,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10121807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:26,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933126063] [2022-11-18 20:55:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:26,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:26,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:26,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:27,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:55:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:55:27,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:27,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:55:27,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:55:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:27,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:27,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933126063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:27,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 11 [2022-11-18 20:55:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930964138] [2022-11-18 20:55:27,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:55:27,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:55:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:55:27,555 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:28,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:28,019 INFO L93 Difference]: Finished difference Result 181 states and 199 transitions. [2022-11-18 20:55:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:55:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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 25 [2022-11-18 20:55:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:28,021 INFO L225 Difference]: With dead ends: 181 [2022-11-18 20:55:28,021 INFO L226 Difference]: Without dead ends: 181 [2022-11-18 20:55:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:55:28,022 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 163 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:28,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 712 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:55:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-18 20:55:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2022-11-18 20:55:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 130 states have (on average 1.353846153846154) internal successors, (176), 161 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 176 transitions. [2022-11-18 20:55:28,039 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 176 transitions. Word has length 25 [2022-11-18 20:55:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:28,040 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 176 transitions. [2022-11-18 20:55:28,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 176 transitions. [2022-11-18 20:55:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 20:55:28,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:28,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:28,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:28,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:28,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:28,261 INFO L85 PathProgramCache]: Analyzing trace with hash 583917852, now seen corresponding path program 1 times [2022-11-18 20:55:28,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:28,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078439288] [2022-11-18 20:55:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:28,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:28,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078439288] [2022-11-18 20:55:28,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078439288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:28,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756666423] [2022-11-18 20:55:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:28,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:28,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:28,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:55:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:55:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:28,626 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 13 treesize of output 9 [2022-11-18 20:55:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:28,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:28,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756666423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:28,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:28,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-18 20:55:28,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805220022] [2022-11-18 20:55:28,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:55:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:55:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:55:28,736 INFO L87 Difference]: Start difference. First operand 162 states and 176 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:28,924 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2022-11-18 20:55:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:55:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 26 [2022-11-18 20:55:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:28,926 INFO L225 Difference]: With dead ends: 172 [2022-11-18 20:55:28,926 INFO L226 Difference]: Without dead ends: 153 [2022-11-18 20:55:28,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:55:28,927 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 12 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:28,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 378 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:55:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-18 20:55:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-18 20:55:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 121 states have (on average 1.371900826446281) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2022-11-18 20:55:28,931 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 26 [2022-11-18 20:55:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:28,931 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2022-11-18 20:55:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2022-11-18 20:55:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:55:28,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:28,932 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:28,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:29,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:29,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:29,139 INFO L85 PathProgramCache]: Analyzing trace with hash -370767273, now seen corresponding path program 1 times [2022-11-18 20:55:29,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:29,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538228996] [2022-11-18 20:55:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:29,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:29,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538228996] [2022-11-18 20:55:29,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538228996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:29,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090523588] [2022-11-18 20:55:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:29,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:29,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:29,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:55:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:55:29,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:29,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:29,763 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:55:29,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:55:29,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:29,962 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:29,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-11-18 20:55:30,001 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:30,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-18 20:55:30,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 20:55:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:30,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:30,170 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_305) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2022-11-18 20:55:30,191 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_305) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2022-11-18 20:55:30,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:30,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-18 20:55:30,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:30,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-18 20:55:30,258 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 20 treesize of output 18 [2022-11-18 20:55:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:30,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090523588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:30,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-11-18 20:55:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722719272] [2022-11-18 20:55:30,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:30,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:55:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:55:30,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=397, Unknown=6, NotChecked=82, Total=552 [2022-11-18 20:55:30,475 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 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) [2022-11-18 20:55:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:31,584 INFO L93 Difference]: Finished difference Result 281 states and 308 transitions. [2022-11-18 20:55:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:55:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 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 29 [2022-11-18 20:55:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:31,586 INFO L225 Difference]: With dead ends: 281 [2022-11-18 20:55:31,586 INFO L226 Difference]: Without dead ends: 281 [2022-11-18 20:55:31,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=799, Unknown=6, NotChecked=122, Total=1122 [2022-11-18 20:55:31,587 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 531 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 458 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:31,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1456 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 901 Invalid, 0 Unknown, 458 Unchecked, 0.6s Time] [2022-11-18 20:55:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-18 20:55:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 168. [2022-11-18 20:55:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 167 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2022-11-18 20:55:31,593 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 29 [2022-11-18 20:55:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:31,593 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2022-11-18 20:55:31,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 24 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) [2022-11-18 20:55:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2022-11-18 20:55:31,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:55:31,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:31,595 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:31,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:31,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:31,805 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash -751968760, now seen corresponding path program 1 times [2022-11-18 20:55:31,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:31,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456143094] [2022-11-18 20:55:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:31,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:31,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:31,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456143094] [2022-11-18 20:55:31,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456143094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:31,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:31,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:31,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570150096] [2022-11-18 20:55:31,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:31,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:31,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:31,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:31,849 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:31,879 INFO L93 Difference]: Finished difference Result 239 states and 260 transitions. [2022-11-18 20:55:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 30 [2022-11-18 20:55:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:31,881 INFO L225 Difference]: With dead ends: 239 [2022-11-18 20:55:31,882 INFO L226 Difference]: Without dead ends: 239 [2022-11-18 20:55:31,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:31,883 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 55 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:31,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 245 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:55:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-18 20:55:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 186. [2022-11-18 20:55:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 154 states have (on average 1.3051948051948052) internal successors, (201), 185 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2022-11-18 20:55:31,888 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 30 [2022-11-18 20:55:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:31,889 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2022-11-18 20:55:31,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2022-11-18 20:55:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:55:31,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:31,890 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 20:55:31,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1573046208, now seen corresponding path program 1 times [2022-11-18 20:55:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:31,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615614276] [2022-11-18 20:55:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615614276] [2022-11-18 20:55:32,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615614276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611437404] [2022-11-18 20:55:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:32,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:32,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:32,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:55:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:55:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:32,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:32,588 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:55:32,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 20:55:32,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:32,813 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:32,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:55:32,861 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:32,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-18 20:55:33,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-18 20:55:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:33,317 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_413) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-18 20:55:33,327 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_413) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-18 20:55:33,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:33,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-18 20:55:33,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:33,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-18 20:55:33,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 20:55:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611437404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:37,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:37,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-11-18 20:55:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303668759] [2022-11-18 20:55:37,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:37,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:55:37,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:55:37,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=614, Unknown=6, NotChecked=106, Total=870 [2022-11-18 20:55:37,682 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 30 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 30 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:45,071 INFO L93 Difference]: Finished difference Result 365 states and 400 transitions. [2022-11-18 20:55:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:55:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 30 states have internal predecessors, (114), 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 39 [2022-11-18 20:55:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:45,073 INFO L225 Difference]: With dead ends: 365 [2022-11-18 20:55:45,074 INFO L226 Difference]: Without dead ends: 365 [2022-11-18 20:55:45,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=329, Invalid=1155, Unknown=6, NotChecked=150, Total=1640 [2022-11-18 20:55:45,075 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 319 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:45,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1556 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 693 Invalid, 0 Unknown, 933 Unchecked, 0.7s Time] [2022-11-18 20:55:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-18 20:55:45,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 197. [2022-11-18 20:55:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 165 states have (on average 1.309090909090909) internal successors, (216), 196 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 216 transitions. [2022-11-18 20:55:45,082 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 216 transitions. Word has length 39 [2022-11-18 20:55:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:45,082 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 216 transitions. [2022-11-18 20:55:45,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 30 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 216 transitions. [2022-11-18 20:55:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:55:45,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:45,084 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:45,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:55:45,296 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1573046209, now seen corresponding path program 1 times [2022-11-18 20:55:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806108277] [2022-11-18 20:55:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:45,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:46,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806108277] [2022-11-18 20:55:46,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806108277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153238562] [2022-11-18 20:55:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:46,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:46,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:46,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:55:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:46,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:55:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:46,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:46,348 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:55:46,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:55:46,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:46,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:46,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:46,682 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:55:46,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:55:46,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:55:46,713 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:46,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:55:46,808 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:46,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-18 20:55:46,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 20:55:47,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-18 20:55:47,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:55:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:47,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:47,943 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_491 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_491) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4))) (forall ((v_ArrVal_490 (Array Int Int)) (v_ArrVal_491 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_491) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_490) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2022-11-18 20:55:47,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:47,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-18 20:55:47,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:47,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-18 20:55:47,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 20:55:48,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:48,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-18 20:55:48,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:48,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 20:55:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:55:48,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-18 20:55:48,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:55:48,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-18 20:55:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:48,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153238562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:48,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:48,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2022-11-18 20:55:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052803308] [2022-11-18 20:55:48,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:55:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:55:48,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=805, Unknown=26, NotChecked=58, Total=992 [2022-11-18 20:55:48,276 INFO L87 Difference]: Start difference. First operand 197 states and 216 transitions. Second operand has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:51,601 INFO L93 Difference]: Finished difference Result 325 states and 350 transitions. [2022-11-18 20:55:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:55:51,602 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 32 states have internal predecessors, (115), 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 39 [2022-11-18 20:55:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:51,604 INFO L225 Difference]: With dead ends: 325 [2022-11-18 20:55:51,604 INFO L226 Difference]: Without dead ends: 325 [2022-11-18 20:55:51,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=483, Invalid=2461, Unknown=30, NotChecked=106, Total=3080 [2022-11-18 20:55:51,606 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 885 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 643 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:51,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1446 Invalid, 2082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1371 Invalid, 0 Unknown, 643 Unchecked, 1.4s Time] [2022-11-18 20:55:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-18 20:55:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 201. [2022-11-18 20:55:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 169 states have (on average 1.301775147928994) internal successors, (220), 200 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) [2022-11-18 20:55:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 220 transitions. [2022-11-18 20:55:51,613 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 220 transitions. Word has length 39 [2022-11-18 20:55:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:51,613 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 220 transitions. [2022-11-18 20:55:51,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 32 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 220 transitions. [2022-11-18 20:55:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 20:55:51,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:51,614 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:51,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:51,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:55:51,821 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1519790839, now seen corresponding path program 1 times [2022-11-18 20:55:51,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:51,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830130758] [2022-11-18 20:55:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:55:51,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:51,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830130758] [2022-11-18 20:55:51,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830130758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:51,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:51,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:51,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997890208] [2022-11-18 20:55:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:51,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:55:51,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:51,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:55:51,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:51,874 INFO L87 Difference]: Start difference. First operand 201 states and 220 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:51,884 INFO L93 Difference]: Finished difference Result 202 states and 220 transitions. [2022-11-18 20:55:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:55:51,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 [2022-11-18 20:55:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:51,886 INFO L225 Difference]: With dead ends: 202 [2022-11-18 20:55:51,886 INFO L226 Difference]: Without dead ends: 202 [2022-11-18 20:55:51,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:55:51,887 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 0 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:51,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 262 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:55:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-18 20:55:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-11-18 20:55:51,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 170 states have (on average 1.2941176470588236) internal successors, (220), 201 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) [2022-11-18 20:55:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 220 transitions. [2022-11-18 20:55:51,892 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 220 transitions. Word has length 40 [2022-11-18 20:55:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:51,893 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 220 transitions. [2022-11-18 20:55:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 220 transitions. [2022-11-18 20:55:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 20:55:51,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:51,894 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:51,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:55:51,894 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 231761564, now seen corresponding path program 1 times [2022-11-18 20:55:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:51,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942806315] [2022-11-18 20:55:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:52,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942806315] [2022-11-18 20:55:52,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942806315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837716678] [2022-11-18 20:55:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:52,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:52,932 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:52,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:55:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:55:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:53,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:53,159 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:55:53,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:55:53,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:53,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:53,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:53,466 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:53,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:55:53,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:53,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:55:53,600 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:53,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-11-18 20:55:53,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-18 20:55:53,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-18 20:55:53,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 20:55:54,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-18 20:55:54,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:55:54,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:55:54,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:54,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-18 20:55:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:54,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:54,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2022-11-18 20:55:55,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:55,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:55:55,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:55,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2022-11-18 20:55:55,152 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 9 treesize of output 7 [2022-11-18 20:55:55,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:55,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 20:55:55,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:55:55,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:55,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:55,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 20:55:55,190 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 20:55:55,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2022-11-18 20:55:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837716678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:55,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:55,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 37 [2022-11-18 20:55:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254562827] [2022-11-18 20:55:55,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:55:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:55:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:55:55,410 INFO L87 Difference]: Start difference. First operand 202 states and 220 transitions. Second operand has 37 states, 37 states have (on average 3.135135135135135) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:58,053 INFO L93 Difference]: Finished difference Result 305 states and 326 transitions. [2022-11-18 20:55:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:55:58,053 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.135135135135135) internal successors, (116), 37 states have internal predecessors, (116), 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 42 [2022-11-18 20:55:58,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:58,055 INFO L225 Difference]: With dead ends: 305 [2022-11-18 20:55:58,055 INFO L226 Difference]: Without dead ends: 305 [2022-11-18 20:55:58,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=416, Invalid=2890, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 20:55:58,056 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 467 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1812 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:58,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 1812 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 941 Invalid, 0 Unknown, 728 Unchecked, 1.0s Time] [2022-11-18 20:55:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-18 20:55:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 201. [2022-11-18 20:55:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 169 states have (on average 1.2899408284023668) internal successors, (218), 200 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 218 transitions. [2022-11-18 20:55:58,062 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 218 transitions. Word has length 42 [2022-11-18 20:55:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:58,062 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 218 transitions. [2022-11-18 20:55:58,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.135135135135135) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 218 transitions. [2022-11-18 20:55:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:55:58,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:58,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:58,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:58,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:58,269 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:55:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1588995560, now seen corresponding path program 1 times [2022-11-18 20:55:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:58,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604817311] [2022-11-18 20:55:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:58,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:58,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604817311] [2022-11-18 20:55:58,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604817311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:55:58,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488788116] [2022-11-18 20:55:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:58,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:58,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:58,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:58,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:55:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:55:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:55:58,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:58,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:59,069 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:55:59,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 20:55:59,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:55:59,325 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:59,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:55:59,373 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:55:59,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-18 20:55:59,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-18 20:55:59,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-18 20:55:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:59,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:00,050 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_681 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_681) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))) (forall ((v_ArrVal_681 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_681) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-18 20:56:00,077 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_681 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_681) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) (forall ((v_ArrVal_681 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_681) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|)))) is different from false [2022-11-18 20:56:00,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:00,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-18 20:56:00,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:00,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-18 20:56:00,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-18 20:56:00,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:00,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-18 20:56:00,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:56:00,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 20:56:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:00,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488788116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:00,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:00,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-18 20:56:00,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958511070] [2022-11-18 20:56:00,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:00,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:56:00,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:00,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:56:00,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=580, Unknown=9, NotChecked=102, Total=812 [2022-11-18 20:56:00,398 INFO L87 Difference]: Start difference. First operand 201 states and 218 transitions. Second operand has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:01,271 INFO L93 Difference]: Finished difference Result 247 states and 268 transitions. [2022-11-18 20:56:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:56:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 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 44 [2022-11-18 20:56:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:01,273 INFO L225 Difference]: With dead ends: 247 [2022-11-18 20:56:01,273 INFO L226 Difference]: Without dead ends: 247 [2022-11-18 20:56:01,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=801, Unknown=9, NotChecked=122, Total=1122 [2022-11-18 20:56:01,274 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 362 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:01,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1082 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 768 Invalid, 0 Unknown, 561 Unchecked, 0.6s Time] [2022-11-18 20:56:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-18 20:56:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 224. [2022-11-18 20:56:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 192 states have (on average 1.3125) internal successors, (252), 223 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:01,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2022-11-18 20:56:01,280 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 44 [2022-11-18 20:56:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:01,281 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2022-11-18 20:56:01,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.642857142857143) internal successors, (102), 29 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2022-11-18 20:56:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:56:01,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:01,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:01,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:01,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:01,488 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:01,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1588995559, now seen corresponding path program 1 times [2022-11-18 20:56:01,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:01,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440078435] [2022-11-18 20:56:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:01,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:01,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:02,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440078435] [2022-11-18 20:56:02,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440078435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319804034] [2022-11-18 20:56:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:02,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:02,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:02,039 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:02,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:56:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:56:02,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:02,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:02,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:02,324 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:02,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:02,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:02,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:02,583 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:02,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:56:02,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:56:02,611 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:02,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:56:02,692 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:02,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-18 20:56:02,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-18 20:56:03,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-18 20:56:03,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:56:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:03,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:03,637 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_761 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_761) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_762 (Array Int Int)) (v_ArrVal_761 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_761) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_762) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-18 20:56:03,651 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_762 (Array Int Int)) (v_ArrVal_761 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_761) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_762) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_761 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_761) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-18 20:56:03,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:03,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-18 20:56:03,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:03,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 20:56:03,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:03,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2022-11-18 20:56:03,717 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:03,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-11-18 20:56:03,726 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 34 treesize of output 30 [2022-11-18 20:56:03,732 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 62 treesize of output 58 [2022-11-18 20:56:03,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:03,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 20:56:03,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:56:03,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 20:56:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319804034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:04,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:04,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2022-11-18 20:56:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332565790] [2022-11-18 20:56:04,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:56:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:56:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=8, NotChecked=106, Total=870 [2022-11-18 20:56:04,022 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:08,607 INFO L93 Difference]: Finished difference Result 248 states and 270 transitions. [2022-11-18 20:56:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:56:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 30 states have internal predecessors, (130), 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 44 [2022-11-18 20:56:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:08,609 INFO L225 Difference]: With dead ends: 248 [2022-11-18 20:56:08,609 INFO L226 Difference]: Without dead ends: 248 [2022-11-18 20:56:08,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=298, Invalid=1506, Unknown=10, NotChecked=166, Total=1980 [2022-11-18 20:56:08,611 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 395 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:08,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1266 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 897 Invalid, 0 Unknown, 423 Unchecked, 0.9s Time] [2022-11-18 20:56:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-18 20:56:08,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 224. [2022-11-18 20:56:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 192 states have (on average 1.3072916666666667) internal successors, (251), 223 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 251 transitions. [2022-11-18 20:56:08,617 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 251 transitions. Word has length 44 [2022-11-18 20:56:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:08,617 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 251 transitions. [2022-11-18 20:56:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.482758620689655) internal successors, (130), 30 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 251 transitions. [2022-11-18 20:56:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:56:08,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:08,618 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:08,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:08,828 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -64101254, now seen corresponding path program 1 times [2022-11-18 20:56:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:08,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222237358] [2022-11-18 20:56:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:08,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:56:08,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:08,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222237358] [2022-11-18 20:56:08,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222237358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:08,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:56:08,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:56:08,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055494182] [2022-11-18 20:56:08,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:08,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:56:08,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:56:08,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:56:08,888 INFO L87 Difference]: Start difference. First operand 224 states and 251 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:08,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:08,930 INFO L93 Difference]: Finished difference Result 298 states and 331 transitions. [2022-11-18 20:56:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:56:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 44 [2022-11-18 20:56:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:08,933 INFO L225 Difference]: With dead ends: 298 [2022-11-18 20:56:08,933 INFO L226 Difference]: Without dead ends: 298 [2022-11-18 20:56:08,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:56:08,934 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 64 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:08,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 282 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:56:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-18 20:56:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 242. [2022-11-18 20:56:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 210 states have (on average 1.2857142857142858) internal successors, (270), 241 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 270 transitions. [2022-11-18 20:56:08,940 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 270 transitions. Word has length 44 [2022-11-18 20:56:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:08,940 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 270 transitions. [2022-11-18 20:56:08,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 270 transitions. [2022-11-18 20:56:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:56:08,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:08,941 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:08,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 20:56:08,942 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:08,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2014223229, now seen corresponding path program 1 times [2022-11-18 20:56:08,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:08,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906586256] [2022-11-18 20:56:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:08,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:56:09,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:09,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906586256] [2022-11-18 20:56:09,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906586256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:09,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77129762] [2022-11-18 20:56:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:09,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:09,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:09,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:09,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:56:09,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:09,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:56:09,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:09,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-18 20:56:09,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-18 20:56:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:56:09,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:56:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77129762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:09,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:09,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-18 20:56:09,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402338677] [2022-11-18 20:56:09,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:56:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:56:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:56:09,474 INFO L87 Difference]: Start difference. First operand 242 states and 270 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:09,752 INFO L93 Difference]: Finished difference Result 283 states and 314 transitions. [2022-11-18 20:56:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:56:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 45 [2022-11-18 20:56:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:09,754 INFO L225 Difference]: With dead ends: 283 [2022-11-18 20:56:09,754 INFO L226 Difference]: Without dead ends: 275 [2022-11-18 20:56:09,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:56:09,755 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 176 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:09,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 519 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:56:09,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-18 20:56:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 269. [2022-11-18 20:56:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 237 states have (on average 1.2827004219409284) internal successors, (304), 268 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 304 transitions. [2022-11-18 20:56:09,761 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 304 transitions. Word has length 45 [2022-11-18 20:56:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:09,761 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 304 transitions. [2022-11-18 20:56:09,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 304 transitions. [2022-11-18 20:56:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:56:09,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:09,762 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:09,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:56:09,969 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash 164743237, now seen corresponding path program 1 times [2022-11-18 20:56:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363973106] [2022-11-18 20:56:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:10,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:10,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363973106] [2022-11-18 20:56:10,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363973106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:10,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394270331] [2022-11-18 20:56:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:10,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:10,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:10,880 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:10,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:56:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:11,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:56:11,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:11,059 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 6 treesize of output 5 [2022-11-18 20:56:11,201 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:11,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:11,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:11,507 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:11,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-11-18 20:56:11,554 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:11,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-11-18 20:56:11,694 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:11,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:11,776 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:56:11,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-11-18 20:56:12,071 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:56:12,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2022-11-18 20:56:12,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-18 20:56:12,307 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:56:12,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 55 [2022-11-18 20:56:12,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-18 20:56:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:12,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:12,635 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1003 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1003) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2022-11-18 20:56:12,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:12,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 20:56:12,963 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_1003 (Array Int Int)) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (let ((.cse0 (select v_arrayElimArr_14 |ULTIMATE.start_main_~item~0#1.offset|))) (or (not (= (select |c_#valid| .cse0) 0)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_arrayElimArr_14) .cse0 v_ArrVal_1003) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))))) is different from false [2022-11-18 20:56:13,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:13,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-18 20:56:13,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:13,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 76 [2022-11-18 20:56:13,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:13,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 65 [2022-11-18 20:56:13,227 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 50 treesize of output 46 [2022-11-18 20:56:13,245 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:56:13,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:56:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-18 20:56:13,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394270331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:13,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:13,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 40 [2022-11-18 20:56:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893043638] [2022-11-18 20:56:13,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:56:13,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:56:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1226, Unknown=22, NotChecked=146, Total=1560 [2022-11-18 20:56:13,580 INFO L87 Difference]: Start difference. First operand 269 states and 304 transitions. Second operand has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:16,499 INFO L93 Difference]: Finished difference Result 336 states and 377 transitions. [2022-11-18 20:56:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:56:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 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 45 [2022-11-18 20:56:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:16,503 INFO L225 Difference]: With dead ends: 336 [2022-11-18 20:56:16,503 INFO L226 Difference]: Without dead ends: 336 [2022-11-18 20:56:16,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=508, Invalid=2554, Unknown=26, NotChecked=218, Total=3306 [2022-11-18 20:56:16,505 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 409 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:16,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1781 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1170 Invalid, 0 Unknown, 767 Unchecked, 1.2s Time] [2022-11-18 20:56:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-18 20:56:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 292. [2022-11-18 20:56:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 260 states have (on average 1.2615384615384615) internal successors, (328), 291 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 328 transitions. [2022-11-18 20:56:16,512 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 328 transitions. Word has length 45 [2022-11-18 20:56:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:16,513 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 328 transitions. [2022-11-18 20:56:16,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 40 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 328 transitions. [2022-11-18 20:56:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 20:56:16,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:16,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:16,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 20:56:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:16,720 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1983636472, now seen corresponding path program 1 times [2022-11-18 20:56:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:16,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677429182] [2022-11-18 20:56:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:17,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677429182] [2022-11-18 20:56:17,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677429182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001186673] [2022-11-18 20:56:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:17,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:17,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:17,112 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:17,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:56:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:56:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:17,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:17,384 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:17,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:17,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:17,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:17,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 20:56:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:56:17,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:56:17,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:56:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:17,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:18,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:18,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-18 20:56:18,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:18,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-18 20:56:18,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:56:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:18,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001186673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:18,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:18,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-11-18 20:56:18,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692476943] [2022-11-18 20:56:18,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:18,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:56:18,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:56:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=478, Unknown=30, NotChecked=0, Total=600 [2022-11-18 20:56:18,282 INFO L87 Difference]: Start difference. First operand 292 states and 328 transitions. Second operand has 25 states, 24 states have (on average 4.0) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:18,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:18,986 INFO L93 Difference]: Finished difference Result 302 states and 333 transitions. [2022-11-18 20:56:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:56:18,987 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.0) internal successors, (96), 25 states have internal predecessors, (96), 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 [2022-11-18 20:56:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:18,988 INFO L225 Difference]: With dead ends: 302 [2022-11-18 20:56:18,988 INFO L226 Difference]: Without dead ends: 302 [2022-11-18 20:56:18,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=233, Invalid=990, Unknown=37, NotChecked=0, Total=1260 [2022-11-18 20:56:18,990 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 368 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:18,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 958 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 402 Invalid, 0 Unknown, 270 Unchecked, 0.4s Time] [2022-11-18 20:56:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-18 20:56:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 294. [2022-11-18 20:56:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 262 states have (on average 1.2595419847328244) internal successors, (330), 293 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:18,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 330 transitions. [2022-11-18 20:56:18,997 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 330 transitions. Word has length 46 [2022-11-18 20:56:18,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:18,997 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 330 transitions. [2022-11-18 20:56:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.0) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 330 transitions. [2022-11-18 20:56:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:56:18,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:18,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:19,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:19,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:56:19,205 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:19,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1363188935, now seen corresponding path program 1 times [2022-11-18 20:56:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:19,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903179837] [2022-11-18 20:56:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:19,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903179837] [2022-11-18 20:56:19,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903179837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:19,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766093053] [2022-11-18 20:56:19,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:19,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:19,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:19,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:56:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:56:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:19,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:19,930 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:19,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:19,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:20,173 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:20,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-11-18 20:56:20,216 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:20,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-18 20:56:20,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-18 20:56:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:20,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:20,608 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1155 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1155) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-18 20:56:20,695 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1155 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1155) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-18 20:56:20,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:20,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-18 20:56:20,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:20,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-18 20:56:20,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 20:56:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:20,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766093053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:20,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:20,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-18 20:56:20,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095351956] [2022-11-18 20:56:20,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:20,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:56:20,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:20,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:56:20,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=8, NotChecked=82, Total=552 [2022-11-18 20:56:20,906 INFO L87 Difference]: Start difference. First operand 294 states and 330 transitions. Second operand has 24 states, 23 states have (on average 4.217391304347826) internal successors, (97), 24 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:22,056 INFO L93 Difference]: Finished difference Result 302 states and 333 transitions. [2022-11-18 20:56:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:56:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.217391304347826) internal successors, (97), 24 states have internal predecessors, (97), 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 47 [2022-11-18 20:56:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:22,058 INFO L225 Difference]: With dead ends: 302 [2022-11-18 20:56:22,058 INFO L226 Difference]: Without dead ends: 302 [2022-11-18 20:56:22,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=901, Unknown=13, NotChecked=130, Total=1260 [2022-11-18 20:56:22,060 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 305 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:22,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1028 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 654 Invalid, 0 Unknown, 373 Unchecked, 0.6s Time] [2022-11-18 20:56:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-18 20:56:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2022-11-18 20:56:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 263 states have (on average 1.258555133079848) internal successors, (331), 294 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 331 transitions. [2022-11-18 20:56:22,070 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 331 transitions. Word has length 47 [2022-11-18 20:56:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:22,071 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 331 transitions. [2022-11-18 20:56:22,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.217391304347826) internal successors, (97), 24 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 331 transitions. [2022-11-18 20:56:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:56:22,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:22,078 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:22,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:22,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:56:22,285 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash -595406900, now seen corresponding path program 1 times [2022-11-18 20:56:22,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:22,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453070491] [2022-11-18 20:56:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:22,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:23,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:23,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453070491] [2022-11-18 20:56:23,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453070491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:23,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602200602] [2022-11-18 20:56:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:23,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:23,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:23,019 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:23,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:56:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:56:23,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:23,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:23,328 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:23,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:23,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:23,558 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:23,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-18 20:56:23,598 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:23,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-18 20:56:23,702 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:23,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:23,772 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:56:23,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-18 20:56:24,025 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:56:24,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 49 [2022-11-18 20:56:24,040 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 12 treesize of output 8 [2022-11-18 20:56:24,214 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:56:24,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-11-18 20:56:24,246 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 16 treesize of output 12 [2022-11-18 20:56:24,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-18 20:56:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:24,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:24,502 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1272 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1272) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-18 20:56:24,529 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1272 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1272) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-18 20:56:24,537 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1272 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1272) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-18 20:56:24,555 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-18 20:56:24,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-18 20:56:24,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:24,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-18 20:56:25,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:25,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 20:56:25,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:25,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 133 [2022-11-18 20:56:25,084 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 118 treesize of output 110 [2022-11-18 20:56:25,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:25,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 108 [2022-11-18 20:56:25,115 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:56:25,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:56:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-18 20:56:25,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602200602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:25,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:25,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-11-18 20:56:25,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730311758] [2022-11-18 20:56:25,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:25,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:56:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:25,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:56:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1040, Unknown=17, NotChecked=204, Total=1406 [2022-11-18 20:56:25,381 INFO L87 Difference]: Start difference. First operand 295 states and 331 transitions. Second operand has 38 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:31,939 INFO L93 Difference]: Finished difference Result 343 states and 384 transitions. [2022-11-18 20:56:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:56:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 38 states have internal predecessors, (120), 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 47 [2022-11-18 20:56:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:31,942 INFO L225 Difference]: With dead ends: 343 [2022-11-18 20:56:31,942 INFO L226 Difference]: Without dead ends: 343 [2022-11-18 20:56:31,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=484, Invalid=2591, Unknown=17, NotChecked=330, Total=3422 [2022-11-18 20:56:31,944 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 267 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 828 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:31,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1661 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 823 Invalid, 0 Unknown, 828 Unchecked, 0.8s Time] [2022-11-18 20:56:31,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-18 20:56:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 298. [2022-11-18 20:56:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 266 states have (on average 1.2593984962406015) internal successors, (335), 297 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2022-11-18 20:56:31,952 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 47 [2022-11-18 20:56:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:31,952 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2022-11-18 20:56:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.2432432432432434) internal successors, (120), 38 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2022-11-18 20:56:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-18 20:56:31,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:31,953 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:31,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:32,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:56:32,161 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash -595406899, now seen corresponding path program 1 times [2022-11-18 20:56:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:32,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034033098] [2022-11-18 20:56:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:33,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034033098] [2022-11-18 20:56:33,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034033098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:33,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826049624] [2022-11-18 20:56:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:33,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:33,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:33,103 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:33,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:56:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:33,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:56:33,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:33,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:33,400 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:33,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:33,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:33,673 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:33,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:56:33,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:56:33,709 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:33,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-18 20:56:33,823 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:33,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:56:33,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:56:33,853 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:33,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-18 20:56:33,993 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:33,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:56:34,097 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:34,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:56:34,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:56:34,129 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:56:34,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-18 20:56:34,442 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:34,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:56:34,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-18 20:56:34,480 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:56:34,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 51 [2022-11-18 20:56:34,504 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 12 treesize of output 8 [2022-11-18 20:56:34,763 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-18 20:56:34,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2022-11-18 20:56:34,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:34,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:56:34,821 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-18 20:56:35,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-18 20:56:35,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:56:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:35,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:35,276 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1395 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1395) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_1396 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-11-18 20:56:35,318 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1395 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1395) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_1396 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-11-18 20:56:35,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:35,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2022-11-18 20:56:35,577 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 (Array Int Int)) (v_prenex_2 (Array Int Int))) (< (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_prenex_2) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_prenex_1) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 1))) (forall ((v_ArrVal_1396 (Array Int Int)) (v_ArrVal_1392 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1392) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1396) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_1395 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_#t~malloc3#1.base|)) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1395) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~item~0#1.base|))) is different from false [2022-11-18 20:56:35,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:35,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-18 20:56:36,426 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_1 (Array Int Int)) (v_prenex_2 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc3#1.base_41| Int)) (or (< (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_prenex_2) |v_ULTIMATE.start_main_#t~malloc3#1.base_41| v_prenex_1) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_41|) 0)))) (forall ((v_ArrVal_1396 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc3#1.base_41| Int) (v_ArrVal_1392 (Array Int Int))) (or (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1392) |v_ULTIMATE.start_main_#t~malloc3#1.base_41| v_ArrVal_1396) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_41|) 0)))) (forall ((|ULTIMATE.start_main_~item~0#1.offset| Int)) (or (forall ((v_ArrVal_1395 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_20 |ULTIMATE.start_main_~item~0#1.offset|))) (or (= |c_ULTIMATE.start_main_#t~mem4#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_arrayElimArr_20) .cse0 v_ArrVal_1395) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (not (= (select |c_#valid| .cse0) 0))))) (not (<= 0 |ULTIMATE.start_main_~item~0#1.offset|))))) is different from false [2022-11-18 20:56:36,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:36,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 86 [2022-11-18 20:56:36,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:36,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 78 [2022-11-18 20:56:36,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:36,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 211 [2022-11-18 20:56:36,747 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 195 treesize of output 191 [2022-11-18 20:56:36,755 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 191 treesize of output 187 [2022-11-18 20:56:36,764 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 187 treesize of output 179 [2022-11-18 20:56:36,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 177 [2022-11-18 20:56:36,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:36,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 233 [2022-11-18 20:56:36,805 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 217 treesize of output 213 [2022-11-18 20:56:36,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:36,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 210 [2022-11-18 20:56:36,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:36,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208 treesize of output 248 [2022-11-18 20:56:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-18 20:56:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826049624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:37,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:56:37,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2022-11-18 20:56:37,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51893861] [2022-11-18 20:56:37,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:37,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:56:37,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:37,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:56:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1297, Unknown=27, NotChecked=308, Total=1806 [2022-11-18 20:56:37,681 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand has 43 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:40,944 INFO L93 Difference]: Finished difference Result 337 states and 378 transitions. [2022-11-18 20:56:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:56:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 43 states have internal predecessors, (138), 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 47 [2022-11-18 20:56:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:40,947 INFO L225 Difference]: With dead ends: 337 [2022-11-18 20:56:40,947 INFO L226 Difference]: Without dead ends: 337 [2022-11-18 20:56:40,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=454, Invalid=2727, Unknown=27, NotChecked=452, Total=3660 [2022-11-18 20:56:40,949 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 390 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1303 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:40,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 1913 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1207 Invalid, 0 Unknown, 1303 Unchecked, 1.2s Time] [2022-11-18 20:56:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-18 20:56:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 298. [2022-11-18 20:56:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 266 states have (on average 1.255639097744361) internal successors, (334), 297 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 334 transitions. [2022-11-18 20:56:40,956 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 334 transitions. Word has length 47 [2022-11-18 20:56:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:40,957 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 334 transitions. [2022-11-18 20:56:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 43 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 334 transitions. [2022-11-18 20:56:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:56:40,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:40,958 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:40,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:41,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:56:41,165 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr68ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash -690815526, now seen corresponding path program 1 times [2022-11-18 20:56:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68464221] [2022-11-18 20:56:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:41,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:56:41,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:41,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68464221] [2022-11-18 20:56:41,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68464221] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:41,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:56:41,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:56:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770204386] [2022-11-18 20:56:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:41,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:56:41,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:41,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:56:41,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:56:41,231 INFO L87 Difference]: Start difference. First operand 298 states and 334 transitions. Second operand has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:41,378 INFO L93 Difference]: Finished difference Result 302 states and 337 transitions. [2022-11-18 20:56:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:56:41,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 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 48 [2022-11-18 20:56:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:41,379 INFO L225 Difference]: With dead ends: 302 [2022-11-18 20:56:41,380 INFO L226 Difference]: Without dead ends: 302 [2022-11-18 20:56:41,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:56:41,380 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 162 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:41,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 156 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:56:41,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-18 20:56:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 291. [2022-11-18 20:56:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 260 states have (on average 1.2576923076923077) internal successors, (327), 290 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 327 transitions. [2022-11-18 20:56:41,387 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 327 transitions. Word has length 48 [2022-11-18 20:56:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:41,396 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 327 transitions. [2022-11-18 20:56:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 327 transitions. [2022-11-18 20:56:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:56:41,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:41,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-18 20:56:41,398 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2103557434, now seen corresponding path program 1 times [2022-11-18 20:56:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012516847] [2022-11-18 20:56:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:41,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:41,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:41,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012516847] [2022-11-18 20:56:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012516847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:56:41,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:56:41,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:56:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544961394] [2022-11-18 20:56:41,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:56:41,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:56:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:56:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:56:41,461 INFO L87 Difference]: Start difference. First operand 291 states and 327 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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) [2022-11-18 20:56:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:41,509 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2022-11-18 20:56:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:56:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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) Word has length 48 [2022-11-18 20:56:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:41,511 INFO L225 Difference]: With dead ends: 308 [2022-11-18 20:56:41,511 INFO L226 Difference]: Without dead ends: 308 [2022-11-18 20:56:41,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:56:41,512 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 46 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:41,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 368 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:56:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-18 20:56:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 285. [2022-11-18 20:56:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.236220472440945) internal successors, (314), 284 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 314 transitions. [2022-11-18 20:56:41,519 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 314 transitions. Word has length 48 [2022-11-18 20:56:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:41,519 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 314 transitions. [2022-11-18 20:56:41,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 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) [2022-11-18 20:56:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 314 transitions. [2022-11-18 20:56:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:56:41,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:41,523 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:41,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-18 20:56:41,523 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:56:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash -955374836, now seen corresponding path program 1 times [2022-11-18 20:56:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:41,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540753485] [2022-11-18 20:56:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:41,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540753485] [2022-11-18 20:56:42,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540753485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355151155] [2022-11-18 20:56:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:42,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:42,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:42,675 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:42,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:56:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:42,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 20:56:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:42,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:56:43,000 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:56:43,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 20:56:43,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:43,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:56:43,372 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:43,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:56:43,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:43,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-18 20:56:43,440 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:43,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-18 20:56:43,452 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 11 treesize of output 7 [2022-11-18 20:56:43,484 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:43,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-18 20:56:43,714 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-18 20:56:43,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 20:56:43,807 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:56:43,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-18 20:56:43,814 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 11 treesize of output 7 [2022-11-18 20:56:43,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:56:43,841 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:56:43,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-11-18 20:56:44,160 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-18 20:56:44,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 62 [2022-11-18 20:56:44,174 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:44,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 75 [2022-11-18 20:56:44,258 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-18 20:56:44,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 74 [2022-11-18 20:56:44,272 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 20:56:44,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 75 [2022-11-18 20:56:44,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2022-11-18 20:56:44,716 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:56:44,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2022-11-18 20:56:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:56:44,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:44,788 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1590 (Array Int Int))) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1590))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1589) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0))) is different from false [2022-11-18 20:56:44,917 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1590 (Array Int Int))) (not (= (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1590))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1589) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) 0))) is different from false [2022-11-18 20:56:44,931 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1590 (Array Int Int))) (not (= (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_#t~malloc3#1.base|)) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1590))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1585) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1589) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0))) is different from false [2022-11-18 20:56:45,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:45,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2022-11-18 20:56:45,276 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_23 (Array Int Int)) (v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1590 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_23 |c_ULTIMATE.start_main_#t~mem4#1.offset|))) (or (not (= (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_arrayElimArr_23) .cse1 v_ArrVal_1590))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1585) .cse1 v_ArrVal_1589) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 0)) (= .cse1 0) (not (= (select |c_#valid| .cse1) 0))))) is different from false [2022-11-18 20:56:45,295 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_23 (Array Int Int)) (v_ArrVal_1589 (Array Int Int)) (v_ArrVal_1585 (Array Int Int)) (v_ArrVal_1590 (Array Int Int))) (let ((.cse2 (select v_arrayElimArr_23 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|)))) (or (not (= (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| .cse1 v_arrayElimArr_23) .cse2 v_ArrVal_1590))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1585) .cse2 v_ArrVal_1589) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) 0)) (not (= (select |c_#valid| .cse2) 0)) (= .cse2 0)))) is different from false [2022-11-18 20:56:45,330 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:45,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 65 [2022-11-18 20:56:45,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:45,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 49 [2022-11-18 20:56:45,357 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:45,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 334 [2022-11-18 20:56:46,456 INFO L321 Elim1Store]: treesize reduction 294, result has 60.5 percent of original size [2022-11-18 20:56:46,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 12 new quantified variables, introduced 55 case distinctions, treesize of input 4239 treesize of output 4240 [2022-11-18 20:56:46,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:46,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 3948 treesize of output 3176 [2022-11-18 20:56:46,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:56:46,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3089 treesize of output 2877 [2022-11-18 20:56:46,928 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 219 treesize of output 181 [2022-11-18 20:56:47,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 171 [2022-11-18 20:58:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-18 20:58:09,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355151155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:09,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:58:09,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 41 [2022-11-18 20:58:09,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358752981] [2022-11-18 20:58:09,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:09,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:58:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:58:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1117, Unknown=25, NotChecked=360, Total=1640 [2022-11-18 20:58:09,481 INFO L87 Difference]: Start difference. First operand 285 states and 314 transitions. Second operand has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:15,074 INFO L93 Difference]: Finished difference Result 326 states and 360 transitions. [2022-11-18 20:58:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:58:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 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 [2022-11-18 20:58:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:15,076 INFO L225 Difference]: With dead ends: 326 [2022-11-18 20:58:15,076 INFO L226 Difference]: Without dead ends: 326 [2022-11-18 20:58:15,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=380, Invalid=2265, Unknown=27, NotChecked=520, Total=3192 [2022-11-18 20:58:15,078 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 335 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1217 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:15,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1983 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1510 Invalid, 0 Unknown, 1217 Unchecked, 1.5s Time] [2022-11-18 20:58:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-18 20:58:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 286. [2022-11-18 20:58:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 255 states have (on average 1.2352941176470589) internal successors, (315), 285 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions. [2022-11-18 20:58:15,085 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 49 [2022-11-18 20:58:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:15,086 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions. [2022-11-18 20:58:15,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.097560975609756) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions. [2022-11-18 20:58:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:58:15,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:15,087 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:15,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:15,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:15,294 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 20:58:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:15,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1846224445, now seen corresponding path program 2 times [2022-11-18 20:58:15,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:15,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195170055] [2022-11-18 20:58:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:15,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:16,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195170055] [2022-11-18 20:58:16,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195170055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:16,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180460798] [2022-11-18 20:58:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:16,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:16,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:16,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:58:16,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:58:16,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:58:16,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:16,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:58:16,666 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:58:16,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:58:16,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:58:16,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:58:16,969 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 20:58:16,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-18 20:58:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:16,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-18 20:58:17,103 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 20:58:17,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 50 [2022-11-18 20:58:17,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-18 20:58:17,850 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-11-18 20:58:17,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2022-11-18 20:58:17,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:58:17,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 20:58:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:18,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:21,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:58:21,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:58:21,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 5230 treesize of output 5086 [2022-11-18 21:00:14,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1722 treesize of output 1706 [2022-11-18 21:00:14,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:00:14,839 INFO L321 Elim1Store]: treesize reduction 81, result has 38.6 percent of original size [2022-11-18 21:00:14,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 3730 treesize of output 3556 [2022-11-18 21:00:15,176 INFO L321 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2022-11-18 21:00:15,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1015 treesize of output 1029 [2022-11-18 21:00:15,285 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 6 treesize of output 4 [2022-11-18 21:00:15,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-18 21:00:15,432 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 6 treesize of output 4 [2022-11-18 21:00:15,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:00:15,529 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 983 treesize of output 973 [2022-11-18 21:00:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:17,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180460798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:17,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:00:17,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-11-18 21:00:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778405215] [2022-11-18 21:00:17,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:17,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 21:00:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:00:17,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 21:00:17,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 21:00:17,245 INFO L87 Difference]: Start difference. First operand 286 states and 315 transitions. Second operand has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:19,288 INFO L93 Difference]: Finished difference Result 301 states and 325 transitions. [2022-11-18 21:00:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:00:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 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 50 [2022-11-18 21:00:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:19,290 INFO L225 Difference]: With dead ends: 301 [2022-11-18 21:00:19,290 INFO L226 Difference]: Without dead ends: 301 [2022-11-18 21:00:19,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=306, Invalid=2664, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 21:00:19,292 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 432 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:19,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1745 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 878 Invalid, 0 Unknown, 410 Unchecked, 0.9s Time] [2022-11-18 21:00:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-18 21:00:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 286. [2022-11-18 21:00:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 255 states have (on average 1.2352941176470589) internal successors, (315), 285 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 315 transitions. [2022-11-18 21:00:19,299 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 315 transitions. Word has length 50 [2022-11-18 21:00:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:19,305 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 315 transitions. [2022-11-18 21:00:19,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:19,306 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 315 transitions. [2022-11-18 21:00:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 21:00:19,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:19,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:19,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:19,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:19,515 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-18 21:00:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1316419221, now seen corresponding path program 1 times [2022-11-18 21:00:19,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:00:19,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75601177] [2022-11-18 21:00:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:00:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:20,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:00:20,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75601177] [2022-11-18 21:00:20,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75601177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:00:20,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497292318] [2022-11-18 21:00:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:20,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:00:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:00:20,515 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:00:20,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01db1882-71e9-4329-881f-07f6ac4ce8b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 21:00:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 21:00:20,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:20,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:00:20,838 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 21:00:20,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 21:00:20,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 21:00:20,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 21:00:21,114 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-18 21:00:21,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-18 21:00:21,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-18 21:00:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:00:21,245 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:00:21,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2022-11-18 21:00:21,265 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-18 21:00:21,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2022-11-18 21:00:22,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:00:22,076 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:00:22,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-11-18 21:00:22,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2022-11-18 21:00:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:22,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:27,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:00:27,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 24914 treesize of output 23639 [2022-11-18 21:00:28,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:00:31,367 INFO L321 Elim1Store]: treesize reduction 624, result has 48.3 percent of original size [2022-11-18 21:00:31,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 1887455 treesize of output 1777968 [2022-11-18 21:03:59,083 WARN L233 SmtUtils]: Spent 3.46m on a formula simplification. DAG size of input: 1271 DAG size of output: 1238 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 21:04:06,494 WARN L233 SmtUtils]: Spent 7.40s on a formula simplification that was a NOOP. DAG size: 1226 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 21:04:06,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:04:06,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2098482 treesize of output 1800068 [2022-11-18 21:04:14,271 WARN L233 SmtUtils]: Spent 7.48s on a formula simplification that was a NOOP. DAG size: 1270 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 21:04:15,173 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 6 treesize of output 4 [2022-11-18 21:04:37,909 WARN L233 SmtUtils]: Spent 14.52s on a formula simplification that was a NOOP. DAG size: 1017 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 21:04:53,307 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 1007 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 21:07:41,409 WARN L233 SmtUtils]: Spent 20.13s on a formula simplification that was a NOOP. DAG size: 1014 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-18 21:08:01,970 WARN L233 SmtUtils]: Spent 10.32s on a formula simplification that was a NOOP. DAG size: 1006 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)