./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:11:41,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:41,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:41,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:41,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:41,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:41,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:41,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:41,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:41,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:41,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:41,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:41,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:41,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:41,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:41,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:41,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:41,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:41,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:41,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:41,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:41,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:41,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:41,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:41,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:41,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:41,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:41,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:41,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:41,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:41,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:41,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:41,524 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:41,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:41,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:41,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:41,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:41,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:41,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:41,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:41,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:41,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 01:11:41,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:41,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:41,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:41,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:41,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:41,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:41,589 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:41,590 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:41,590 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:41,590 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:11:41,592 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:41,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:41,593 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:11:41,593 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:11:41,593 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:41,594 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:11:41,594 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:11:41,594 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:11:41,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:11:41,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:11:41,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:41,597 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:41,597 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:11:41,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:41,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:41,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:41,599 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:11:41,600 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:11:41,600 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:11:41,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:41,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:11:41,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:41,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:41,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:41,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:41,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:41,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:41,604 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:11:41,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:41,604 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:11:41,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:11:41,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:41,606 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_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-11-26 01:11:41,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:42,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:42,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:42,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:42,032 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:42,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-11-26 01:11:45,356 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:11:45,644 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:11:45,645 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-11-26 01:11:45,653 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data/4cbd7cf06/ba35e4711a044008a3586a9d57af7f39/FLAG1e0d59c3b [2022-11-26 01:11:45,977 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data/4cbd7cf06/ba35e4711a044008a3586a9d57af7f39 [2022-11-26 01:11:45,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:11:45,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:11:45,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:45,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:11:45,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:11:45,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:45" (1/1) ... [2022-11-26 01:11:45,989 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d8fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:45, skipping insertion in model container [2022-11-26 01:11:45,989 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:45" (1/1) ... [2022-11-26 01:11:45,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:11:46,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:11:46,178 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:46,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:46,181 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:46,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:46,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:46,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:46,193 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-11-26 01:11:46,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:11:46,215 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-26 01:11:46,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bb6df12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:46, skipping insertion in model container [2022-11-26 01:11:46,216 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:46,216 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 01:11:46,218 INFO L158 Benchmark]: Toolchain (without parser) took 235.35ms. Allocated memory is still 142.6MB. Free memory was 109.2MB in the beginning and 99.2MB in the end (delta: 10.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-26 01:11:46,218 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:11:46,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.00ms. Allocated memory is still 142.6MB. Free memory was 109.2MB in the beginning and 99.2MB in the end (delta: 10.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-26 01:11:46,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.00ms. Allocated memory is still 142.6MB. Free memory was 109.2MB in the beginning and 99.2MB in the end (delta: 10.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:11:48,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:48,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:48,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:48,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:48,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:48,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:48,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:48,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:48,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:48,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:48,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:48,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:48,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:48,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:48,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:48,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:48,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:48,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:48,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:48,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:48,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:48,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:48,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:48,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:48,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:48,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:48,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:48,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:48,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:48,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:48,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:48,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:48,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:48,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:48,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:48,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:48,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:48,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:48,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:48,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:48,694 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 01:11:48,724 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:48,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:48,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:48,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:48,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:48,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:48,727 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:48,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:48,727 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:48,727 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:48,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:48,728 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:48,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 01:11:48,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 01:11:48,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:48,729 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:48,730 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 01:11:48,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:48,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:48,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:48,731 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 01:11:48,731 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 01:11:48,731 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 01:11:48,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:48,732 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 01:11:48,732 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 01:11:48,732 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 01:11:48,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:48,733 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:48,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:48,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 01:11:48,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:48,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:48,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:48,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:48,734 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 01:11:48,735 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 01:11:48,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:48,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 01:11:48,735 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b8273370cd4ec5730806cf9b8f54c915e93daab6c48b9546d3920e402afdc55 [2022-11-26 01:11:49,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:49,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:49,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:49,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:49,181 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:49,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-11-26 01:11:52,528 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:11:52,820 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:11:52,821 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2022-11-26 01:11:52,836 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data/38c05148d/37711f727fed43e2a9c1d8803e020eb1/FLAGa0f069413 [2022-11-26 01:11:52,852 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/data/38c05148d/37711f727fed43e2a9c1d8803e020eb1 [2022-11-26 01:11:52,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:11:52,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:11:52,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:52,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:11:52,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:11:52,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:52" (1/1) ... [2022-11-26 01:11:52,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28897ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:52, skipping insertion in model container [2022-11-26 01:11:52,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:11:52" (1/1) ... [2022-11-26 01:11:52,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:11:52,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:11:53,077 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,079 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,081 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,082 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,092 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-11-26 01:11:53,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:11:53,118 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 01:11:53,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:11:53,134 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,135 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,137 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,138 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,139 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,145 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-11-26 01:11:53,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:11:53,160 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:11:53,180 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,182 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,183 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,184 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,185 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 01:11:53,186 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 01:11:53,192 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c[2691,2704] [2022-11-26 01:11:53,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:11:53,216 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:11:53,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53 WrapperNode [2022-11-26 01:11:53,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:11:53,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:11:53,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:11:53,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:11:53,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,265 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 149 [2022-11-26 01:11:53,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:11:53,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:11:53,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:11:53,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:11:53,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,356 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:11:53,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:11:53,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:11:53,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:11:53,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (1/1) ... [2022-11-26 01:11:53,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:53,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:11:53,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:11:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:11:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 01:11:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:11:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 01:11:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 01:11:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 01:11:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 01:11:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 01:11:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-26 01:11:53,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-26 01:11:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-26 01:11:53,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-26 01:11:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:11:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:11:53,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:11:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:11:53,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 01:11:53,452 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 01:11:53,588 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:11:53,590 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:11:54,431 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:11:54,590 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:11:54,592 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 01:11:54,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:11:54 BoogieIcfgContainer [2022-11-26 01:11:54,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:11:54,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:11:54,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:11:54,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:11:54,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:11:52" (1/3) ... [2022-11-26 01:11:54,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd78569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:11:54, skipping insertion in model container [2022-11-26 01:11:54,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:11:53" (2/3) ... [2022-11-26 01:11:54,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cd78569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:11:54, skipping insertion in model container [2022-11-26 01:11:54,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:11:54" (3/3) ... [2022-11-26 01:11:54,613 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2022-11-26 01:11:54,636 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:11:54,637 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-26 01:11:54,637 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 01:11:54,861 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-26 01:11:54,925 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 01:11:54,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 261 transitions, 546 flow [2022-11-26 01:11:54,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 261 transitions, 546 flow [2022-11-26 01:11:54,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 261 transitions, 546 flow [2022-11-26 01:11:55,180 INFO L130 PetriNetUnfolder]: 20/258 cut-off events. [2022-11-26 01:11:55,180 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-26 01:11:55,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 258 events. 20/258 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 286 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 206. Up to 3 conditions per place. [2022-11-26 01:11:55,194 INFO L119 LiptonReduction]: Number of co-enabled transitions 3482 [2022-11-26 01:12:43,415 INFO L134 LiptonReduction]: Checked pairs total: 5932 [2022-11-26 01:12:43,416 INFO L136 LiptonReduction]: Total number of compositions: 282 [2022-11-26 01:12:43,426 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 69 places, 66 transitions, 156 flow [2022-11-26 01:12:43,589 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 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) [2022-11-26 01:12:43,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:43,618 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;@77e39652, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:43,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-26 01:12:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 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) [2022-11-26 01:12:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:12:43,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:43,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:12:43,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash 31625, now seen corresponding path program 1 times [2022-11-26 01:12:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:43,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486234001] [2022-11-26 01:12:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:43,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:43,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:43,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:43,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 01:12:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:12:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:44,074 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:12:44,075 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:12:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:44,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:44,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:44,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486234001] [2022-11-26 01:12:44,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486234001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:44,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:44,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018063183] [2022-11-26 01:12:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:44,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:44,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:44,189 INFO L87 Difference]: Start difference. First operand has 2304 states, 1852 states have (on average 4.563174946004319) internal successors, (8451), 2303 states have internal predecessors, (8451), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-26 01:12:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:44,633 INFO L93 Difference]: Finished difference Result 2300 states and 8447 transitions. [2022-11-26 01:12:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-26 01:12:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:44,690 INFO L225 Difference]: With dead ends: 2300 [2022-11-26 01:12:44,690 INFO L226 Difference]: Without dead ends: 2300 [2022-11-26 01:12:44,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:44,699 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:44,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 3 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2022-11-26 01:12:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2300. [2022-11-26 01:12:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1852 states have (on average 4.561015118790497) internal successors, (8447), 2299 states have internal predecessors, (8447), 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) [2022-11-26 01:12:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8447 transitions. [2022-11-26 01:12:44,982 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8447 transitions. Word has length 2 [2022-11-26 01:12:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:44,982 INFO L495 AbstractCegarLoop]: Abstraction has 2300 states and 8447 transitions. [2022-11-26 01:12:44,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-26 01:12:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8447 transitions. [2022-11-26 01:12:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 01:12:44,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:44,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 01:12:45,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-26 01:12:45,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:45,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash 31626, now seen corresponding path program 1 times [2022-11-26 01:12:45,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:45,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259629383] [2022-11-26 01:12:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:45,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:45,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:45,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 01:12:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:45,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:12:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:45,492 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:12:45,492 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:12:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:45,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:45,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259629383] [2022-11-26 01:12:45,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259629383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:45,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:45,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 01:12:45,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860670280] [2022-11-26 01:12:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:45,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:45,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:45,543 INFO L87 Difference]: Start difference. First operand 2300 states and 8447 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-26 01:12:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:46,514 INFO L93 Difference]: Finished difference Result 4596 states and 16890 transitions. [2022-11-26 01:12:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-26 01:12:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:46,574 INFO L225 Difference]: With dead ends: 4596 [2022-11-26 01:12:46,574 INFO L226 Difference]: Without dead ends: 4596 [2022-11-26 01:12:46,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:46,576 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:46,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:12:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2022-11-26 01:12:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 2303. [2022-11-26 01:12:46,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1855 states have (on average 4.557951482479784) internal successors, (8455), 2302 states have internal predecessors, (8455), 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) [2022-11-26 01:12:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 8455 transitions. [2022-11-26 01:12:46,799 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 8455 transitions. Word has length 2 [2022-11-26 01:12:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:46,799 INFO L495 AbstractCegarLoop]: Abstraction has 2303 states and 8455 transitions. [2022-11-26 01:12:46,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-26 01:12:46,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 8455 transitions. [2022-11-26 01:12:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 01:12:46,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:46,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 01:12:46,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:47,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:47,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 986364, now seen corresponding path program 1 times [2022-11-26 01:12:47,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:47,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445802629] [2022-11-26 01:12:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:47,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:47,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:47,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:47,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 01:12:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:47,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:12:47,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:47,298 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:12:47,299 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:12:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:47,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:47,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:47,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445802629] [2022-11-26 01:12:47,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445802629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:47,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1434652945] [2022-11-26 01:12:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:47,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:12:47,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:12:47,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-26 01:12:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:12:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:48,142 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:12:48,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:12:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:48,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1434652945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035577690] [2022-11-26 01:12:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:48,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:48,344 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:48,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:12:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:12:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:48,619 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:12:48,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:12:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:48,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:48,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035577690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:48,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:12:48,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-26 01:12:48,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455809043] [2022-11-26 01:12:48,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:48,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:12:48,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:48,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:12:48,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:12:48,898 INFO L87 Difference]: Start difference. First operand 2303 states and 8455 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2022-11-26 01:12:51,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:12:53,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:53,634 INFO L93 Difference]: Finished difference Result 9191 states and 33784 transitions. [2022-11-26 01:12:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:12:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 [2022-11-26 01:12:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:53,774 INFO L225 Difference]: With dead ends: 9191 [2022-11-26 01:12:53,774 INFO L226 Difference]: Without dead ends: 9191 [2022-11-26 01:12:53,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:12:53,776 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 585 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:53,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 18 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-26 01:12:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9191 states. [2022-11-26 01:12:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9191 to 2312. [2022-11-26 01:12:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 1864 states have (on average 4.54881974248927) internal successors, (8479), 2311 states have internal predecessors, (8479), 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) [2022-11-26 01:12:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 8479 transitions. [2022-11-26 01:12:54,101 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 8479 transitions. Word has length 3 [2022-11-26 01:12:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:54,101 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 8479 transitions. [2022-11-26 01:12:54,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2022-11-26 01:12:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 8479 transitions. [2022-11-26 01:12:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 01:12:54,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:54,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 01:12:54,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:54,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:54,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:54,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:12:54,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 30625314, now seen corresponding path program 1 times [2022-11-26 01:12:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890719920] [2022-11-26 01:12:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:54,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:54,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-26 01:12:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:12:54,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:54,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:54,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:55,016 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 01:12:55,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-26 01:12:55,061 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 01:12:55,062 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 23 treesize of output 19 [2022-11-26 01:12:55,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:55,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:12:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:55,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:12:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:55,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:55,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:55,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890719920] [2022-11-26 01:12:55,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890719920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:55,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:55,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669034002] [2022-11-26 01:12:55,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:55,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:55,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:55,270 INFO L87 Difference]: Start difference. First operand 2312 states and 8479 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-26 01:12:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:55,722 INFO L93 Difference]: Finished difference Result 1879 states and 6674 transitions. [2022-11-26 01:12:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-26 01:12:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:55,734 INFO L225 Difference]: With dead ends: 1879 [2022-11-26 01:12:55,735 INFO L226 Difference]: Without dead ends: 1879 [2022-11-26 01:12:55,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:55,736 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:55,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2022-11-26 01:12:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1879. [2022-11-26 01:12:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1537 states have (on average 4.342225113858166) internal successors, (6674), 1878 states have internal predecessors, (6674), 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) [2022-11-26 01:12:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6674 transitions. [2022-11-26 01:12:55,809 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6674 transitions. Word has length 4 [2022-11-26 01:12:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:55,810 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 6674 transitions. [2022-11-26 01:12:55,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-26 01:12:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6674 transitions. [2022-11-26 01:12:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 01:12:55,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:55,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 01:12:55,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:56,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash 30625315, now seen corresponding path program 1 times [2022-11-26 01:12:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827811682] [2022-11-26 01:12:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:56,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:56,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:56,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:56,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-26 01:12:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:56,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:12:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:56,309 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-26 01:12:56,309 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 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-26 01:12:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:56,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:12:56,484 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:12:56,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:12:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:56,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:56,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827811682] [2022-11-26 01:12:56,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827811682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:56,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:56,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:56,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958355297] [2022-11-26 01:12:56,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:56,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:56,505 INFO L87 Difference]: Start difference. First operand 1879 states and 6674 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-26 01:12:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:56,876 INFO L93 Difference]: Finished difference Result 1446 states and 4869 transitions. [2022-11-26 01:12:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-26 01:12:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:56,887 INFO L225 Difference]: With dead ends: 1446 [2022-11-26 01:12:56,889 INFO L226 Difference]: Without dead ends: 1446 [2022-11-26 01:12:56,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:56,892 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:56,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:12:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-11-26 01:12:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1446. [2022-11-26 01:12:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1210 states have (on average 4.0239669421487605) internal successors, (4869), 1445 states have internal predecessors, (4869), 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) [2022-11-26 01:12:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4869 transitions. [2022-11-26 01:12:56,995 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4869 transitions. Word has length 4 [2022-11-26 01:12:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:56,995 INFO L495 AbstractCegarLoop]: Abstraction has 1446 states and 4869 transitions. [2022-11-26 01:12:56,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-26 01:12:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4869 transitions. [2022-11-26 01:12:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:56,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:56,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:57,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:57,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash -633823365, now seen corresponding path program 1 times [2022-11-26 01:12:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353770926] [2022-11-26 01:12:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:57,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:57,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:57,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:57,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-26 01:12:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:57,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 01:12:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,467 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:12:57,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-26 01:12:57,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-26 01:12:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:12:57,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:57,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:12:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:57,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:57,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:12:57,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353770926] [2022-11-26 01:12:57,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353770926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:57,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:57,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:57,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380117990] [2022-11-26 01:12:57,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:12:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:12:57,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:12:57,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:57,679 INFO L87 Difference]: Start difference. First operand 1446 states and 4869 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:58,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:58,007 INFO L93 Difference]: Finished difference Result 1384 states and 4682 transitions. [2022-11-26 01:12:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:12:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:58,016 INFO L225 Difference]: With dead ends: 1384 [2022-11-26 01:12:58,016 INFO L226 Difference]: Without dead ends: 1384 [2022-11-26 01:12:58,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:12:58,018 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:58,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-11-26 01:12:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-11-26 01:12:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1174 states have (on average 3.988074957410562) internal successors, (4682), 1383 states have internal predecessors, (4682), 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) [2022-11-26 01:12:58,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 4682 transitions. [2022-11-26 01:12:58,080 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 4682 transitions. Word has length 6 [2022-11-26 01:12:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:58,080 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 4682 transitions. [2022-11-26 01:12:58,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 4682 transitions. [2022-11-26 01:12:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:12:58,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:58,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:12:58,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:58,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:58,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:12:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash -633823366, now seen corresponding path program 1 times [2022-11-26 01:12:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:12:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483043295] [2022-11-26 01:12:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:12:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:12:58,298 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:12:58,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-26 01:12:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:58,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:12:58,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:58,564 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-26 01:12:58,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-26 01:12:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:58,895 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-26 01:12:58,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-26 01:13:07,089 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:13:07,239 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-26 01:13:07,240 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 3 case distinctions, treesize of input 51 treesize of output 76 [2022-11-26 01:13:08,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:08,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:08,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:08,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483043295] [2022-11-26 01:13:08,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483043295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:08,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:08,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:08,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711885208] [2022-11-26 01:13:08,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:08,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:08,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:08,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:08,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=6, Unknown=1, NotChecked=0, Total=12 [2022-11-26 01:13:08,317 INFO L87 Difference]: Start difference. First operand 1384 states and 4682 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:08,943 INFO L93 Difference]: Finished difference Result 1322 states and 4495 transitions. [2022-11-26 01:13:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:13:08,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:08,951 INFO L225 Difference]: With dead ends: 1322 [2022-11-26 01:13:08,951 INFO L226 Difference]: Without dead ends: 1322 [2022-11-26 01:13:08,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=9, Invalid=10, Unknown=1, NotChecked=0, Total=20 [2022-11-26 01:13:08,952 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:08,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:13:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-11-26 01:13:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1322. [2022-11-26 01:13:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1138 states have (on average 3.9499121265377855) internal successors, (4495), 1321 states have internal predecessors, (4495), 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) [2022-11-26 01:13:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 4495 transitions. [2022-11-26 01:13:09,022 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 4495 transitions. Word has length 6 [2022-11-26 01:13:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:09,023 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 4495 transitions. [2022-11-26 01:13:09,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:13:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 4495 transitions. [2022-11-26 01:13:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:13:09,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:09,024 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 01:13:09,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:09,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:09,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:09,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:09,246 INFO L85 PathProgramCache]: Analyzing trace with hash -674084854, now seen corresponding path program 2 times [2022-11-26 01:13:09,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:09,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584899340] [2022-11-26 01:13:09,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:09,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:09,248 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:09,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-26 01:13:09,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:09,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:13:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:09,511 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:09,511 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:09,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:10,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584899340] [2022-11-26 01:13:10,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584899340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:10,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602103180] [2022-11-26 01:13:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:10,618 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:10,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:10,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-26 01:13:10,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:10,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:10,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:13:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:10,974 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:10,975 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:11,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:11,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1602103180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:11,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349909648] [2022-11-26 01:13:11,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 01:13:11,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:11,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:11,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:13:11,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 01:13:11,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:13:11,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:13:11,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:11,605 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:11,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:11,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:11,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349909648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:11,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:13:11,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-26 01:13:11,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640862111] [2022-11-26 01:13:11,904 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:11,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 01:13:11,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 01:13:11,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:13:11,906 INFO L87 Difference]: Start difference. First operand 1322 states and 4495 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-26 01:13:14,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:16,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:18,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:20,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:22,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:24,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:26,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:28,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 01:13:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:33,404 INFO L93 Difference]: Finished difference Result 10456 states and 35748 transitions. [2022-11-26 01:13:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:13:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-11-26 01:13:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:33,459 INFO L225 Difference]: With dead ends: 10456 [2022-11-26 01:13:33,460 INFO L226 Difference]: Without dead ends: 10456 [2022-11-26 01:13:33,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:13:33,461 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1230 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 152 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:33,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 87 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1268 Invalid, 5 Unknown, 0 Unchecked, 19.8s Time] [2022-11-26 01:13:33,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2022-11-26 01:13:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 1335. [2022-11-26 01:13:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1151 states have (on average 3.9278887923544743) internal successors, (4521), 1334 states have internal predecessors, (4521), 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) [2022-11-26 01:13:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4521 transitions. [2022-11-26 01:13:33,669 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4521 transitions. Word has length 6 [2022-11-26 01:13:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:33,670 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 4521 transitions. [2022-11-26 01:13:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-26 01:13:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4521 transitions. [2022-11-26 01:13:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:13:33,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:33,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:33,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:33,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:34,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:34,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:34,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:34,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1826304610, now seen corresponding path program 1 times [2022-11-26 01:13:34,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546958371] [2022-11-26 01:13:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:34,276 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:34,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:34,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:34,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-26 01:13:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:13:34,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:34,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:34,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546958371] [2022-11-26 01:13:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546958371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:34,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:34,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:13:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921225371] [2022-11-26 01:13:34,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:34,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:13:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:13:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:34,471 INFO L87 Difference]: Start difference. First operand 1335 states and 4521 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-26 01:13:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:35,326 INFO L93 Difference]: Finished difference Result 1910 states and 6298 transitions. [2022-11-26 01:13:35,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:13:35,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-26 01:13:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:35,335 INFO L225 Difference]: With dead ends: 1910 [2022-11-26 01:13:35,335 INFO L226 Difference]: Without dead ends: 1910 [2022-11-26 01:13:35,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:13:35,336 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:35,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 13 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:13:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-11-26 01:13:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1630. [2022-11-26 01:13:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1446 states have (on average 3.831258644536653) internal successors, (5540), 1629 states have internal predecessors, (5540), 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) [2022-11-26 01:13:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5540 transitions. [2022-11-26 01:13:35,391 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5540 transitions. Word has length 7 [2022-11-26 01:13:35,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:35,391 INFO L495 AbstractCegarLoop]: Abstraction has 1630 states and 5540 transitions. [2022-11-26 01:13:35,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-26 01:13:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5540 transitions. [2022-11-26 01:13:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:13:35,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:35,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:35,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:35,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:35,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash 781125291, now seen corresponding path program 1 times [2022-11-26 01:13:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:35,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899148769] [2022-11-26 01:13:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:35,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:35,606 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:35,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-26 01:13:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:35,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:13:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:35,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:35,936 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-26 01:13:35,937 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 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-26 01:13:35,958 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 250 treesize of output 242 [2022-11-26 01:13:36,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:36,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:13:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:36,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 01:13:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:36,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:36,236 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:36,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899148769] [2022-11-26 01:13:36,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899148769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:36,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:36,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:13:36,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116093301] [2022-11-26 01:13:36,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:36,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:13:36,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:36,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:13:36,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:36,241 INFO L87 Difference]: Start difference. First operand 1630 states and 5540 transitions. Second operand has 5 states, 4 states have (on average 2.0) 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) [2022-11-26 01:13:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:36,562 INFO L93 Difference]: Finished difference Result 1534 states and 5257 transitions. [2022-11-26 01:13:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) 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 [2022-11-26 01:13:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:36,568 INFO L225 Difference]: With dead ends: 1534 [2022-11-26 01:13:36,568 INFO L226 Difference]: Without dead ends: 1534 [2022-11-26 01:13:36,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:36,569 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:36,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:13:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2022-11-26 01:13:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1534. [2022-11-26 01:13:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1388 states have (on average 3.787463976945245) internal successors, (5257), 1533 states have internal predecessors, (5257), 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) [2022-11-26 01:13:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5257 transitions. [2022-11-26 01:13:36,619 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5257 transitions. Word has length 8 [2022-11-26 01:13:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:36,621 INFO L495 AbstractCegarLoop]: Abstraction has 1534 states and 5257 transitions. [2022-11-26 01:13:36,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) 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) [2022-11-26 01:13:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5257 transitions. [2022-11-26 01:13:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 01:13:36,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:36,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:36,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:36,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:36,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash 781125293, now seen corresponding path program 1 times [2022-11-26 01:13:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:36,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041877253] [2022-11-26 01:13:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:36,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:36,839 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:36,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-26 01:13:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:36,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:13:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:37,046 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-26 01:13:37,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-26 01:13:37,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:37,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:13:37,149 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:13:37,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:13:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:37,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:37,222 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:37,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041877253] [2022-11-26 01:13:37,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041877253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:37,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:37,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916885187] [2022-11-26 01:13:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:37,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:37,223 INFO L87 Difference]: Start difference. First operand 1534 states and 5257 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-26 01:13:37,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:37,573 INFO L93 Difference]: Finished difference Result 1438 states and 4974 transitions. [2022-11-26 01:13:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:13:37,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2022-11-26 01:13:37,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:37,578 INFO L225 Difference]: With dead ends: 1438 [2022-11-26 01:13:37,578 INFO L226 Difference]: Without dead ends: 1438 [2022-11-26 01:13:37,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:37,579 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:37,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:13:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-11-26 01:13:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1438. [2022-11-26 01:13:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1330 states have (on average 3.73984962406015) internal successors, (4974), 1437 states have internal predecessors, (4974), 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) [2022-11-26 01:13:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4974 transitions. [2022-11-26 01:13:37,653 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4974 transitions. Word has length 8 [2022-11-26 01:13:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:37,654 INFO L495 AbstractCegarLoop]: Abstraction has 1438 states and 4974 transitions. [2022-11-26 01:13:37,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2022-11-26 01:13:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4974 transitions. [2022-11-26 01:13:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:13:37,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:37,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:37,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:37,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:37,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1554927494, now seen corresponding path program 1 times [2022-11-26 01:13:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:37,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330466548] [2022-11-26 01:13:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:37,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:37,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:37,872 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:37,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-26 01:13:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:13:37,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:37,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:13:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:38,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:38,025 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:38,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330466548] [2022-11-26 01:13:38,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330466548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:38,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:38,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:13:38,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912722283] [2022-11-26 01:13:38,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:38,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:38,027 INFO L87 Difference]: Start difference. First operand 1438 states and 4974 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2022-11-26 01:13:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:38,306 INFO L93 Difference]: Finished difference Result 1108 states and 3824 transitions. [2022-11-26 01:13:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:13:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 [2022-11-26 01:13:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:38,310 INFO L225 Difference]: With dead ends: 1108 [2022-11-26 01:13:38,310 INFO L226 Difference]: Without dead ends: 1108 [2022-11-26 01:13:38,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:38,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:38,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 3 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:13:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-11-26 01:13:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1108. [2022-11-26 01:13:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1045 states have (on average 3.6593301435406698) internal successors, (3824), 1107 states have internal predecessors, (3824), 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) [2022-11-26 01:13:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3824 transitions. [2022-11-26 01:13:38,342 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3824 transitions. Word has length 9 [2022-11-26 01:13:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:38,342 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 3824 transitions. [2022-11-26 01:13:38,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2022-11-26 01:13:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3824 transitions. [2022-11-26 01:13:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:13:38,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:38,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:38,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-26 01:13:38,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:38,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:38,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1554927493, now seen corresponding path program 1 times [2022-11-26 01:13:38,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:38,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123342913] [2022-11-26 01:13:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:38,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:38,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:38,558 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:38,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-26 01:13:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:38,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:13:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:38,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:13:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:38,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:38,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:38,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123342913] [2022-11-26 01:13:38,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123342913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:38,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:38,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:13:38,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402481924] [2022-11-26 01:13:38,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:38,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:13:38,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:13:38,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:13:38,837 INFO L87 Difference]: Start difference. First operand 1108 states and 3824 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2022-11-26 01:13:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:39,410 INFO L93 Difference]: Finished difference Result 1900 states and 6620 transitions. [2022-11-26 01:13:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:13:39,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 [2022-11-26 01:13:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:39,416 INFO L225 Difference]: With dead ends: 1900 [2022-11-26 01:13:39,416 INFO L226 Difference]: Without dead ends: 1900 [2022-11-26 01:13:39,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:13:39,417 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 165 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:39,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 7 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:13:39,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-11-26 01:13:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1238. [2022-11-26 01:13:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1175 states have (on average 4.200851063829787) internal successors, (4936), 1237 states have internal predecessors, (4936), 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) [2022-11-26 01:13:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4936 transitions. [2022-11-26 01:13:39,483 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4936 transitions. Word has length 9 [2022-11-26 01:13:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:39,484 INFO L495 AbstractCegarLoop]: Abstraction has 1238 states and 4936 transitions. [2022-11-26 01:13:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2022-11-26 01:13:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4936 transitions. [2022-11-26 01:13:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 01:13:39,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:39,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:39,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:39,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:39,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1554927492, now seen corresponding path program 1 times [2022-11-26 01:13:39,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:39,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838837814] [2022-11-26 01:13:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:39,702 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:39,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-26 01:13:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:13:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:13:39,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:39,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838837814] [2022-11-26 01:13:39,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838837814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:39,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:39,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:13:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546058027] [2022-11-26 01:13:39,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:39,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:13:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:13:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:39,891 INFO L87 Difference]: Start difference. First operand 1238 states and 4936 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-26 01:13:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:40,491 INFO L93 Difference]: Finished difference Result 1174 states and 4469 transitions. [2022-11-26 01:13:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:13:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-11-26 01:13:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:40,495 INFO L225 Difference]: With dead ends: 1174 [2022-11-26 01:13:40,495 INFO L226 Difference]: Without dead ends: 1174 [2022-11-26 01:13:40,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:13:40,496 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:40,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 13 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:13:40,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-11-26 01:13:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1140. [2022-11-26 01:13:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1077 states have (on average 4.089136490250697) internal successors, (4404), 1139 states have internal predecessors, (4404), 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) [2022-11-26 01:13:40,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 4404 transitions. [2022-11-26 01:13:40,531 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 4404 transitions. Word has length 9 [2022-11-26 01:13:40,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:40,531 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 4404 transitions. [2022-11-26 01:13:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-26 01:13:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 4404 transitions. [2022-11-26 01:13:40,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:13:40,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:40,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:40,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:40,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1585340353, now seen corresponding path program 1 times [2022-11-26 01:13:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:40,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190686160] [2022-11-26 01:13:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:40,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:40,749 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:40,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-26 01:13:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:13:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:41,047 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:13:41,047 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:13:41,095 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 01:13:41,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 01:13:41,121 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:13:41,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:13:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:13:41,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:13:41,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190686160] [2022-11-26 01:13:41,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190686160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:13:41,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:13:41,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:13:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012682285] [2022-11-26 01:13:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:13:41,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:13:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:13:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:13:41,145 INFO L87 Difference]: Start difference. First operand 1140 states and 4404 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-26 01:13:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:13:41,441 INFO L93 Difference]: Finished difference Result 936 states and 3526 transitions. [2022-11-26 01:13:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:13:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 01:13:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:13:41,445 INFO L225 Difference]: With dead ends: 936 [2022-11-26 01:13:41,445 INFO L226 Difference]: Without dead ends: 936 [2022-11-26 01:13:41,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:13:41,446 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:13:41,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:13:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-11-26 01:13:41,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-11-26 01:13:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 893 states have (on average 3.948488241881299) internal successors, (3526), 935 states have internal predecessors, (3526), 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) [2022-11-26 01:13:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3526 transitions. [2022-11-26 01:13:41,483 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3526 transitions. Word has length 10 [2022-11-26 01:13:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:13:41,484 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 3526 transitions. [2022-11-26 01:13:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-26 01:13:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3526 transitions. [2022-11-26 01:13:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:13:41,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:13:41,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:13:41,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-26 01:13:41,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:41,701 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:13:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:13:41,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1585340354, now seen corresponding path program 1 times [2022-11-26 01:13:41,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:13:41,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573536060] [2022-11-26 01:13:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:13:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:13:41,704 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:13:41,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-26 01:13:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:41,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:13:41,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:42,129 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:42,129 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:42,279 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:13:42,279 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:13:42,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:42,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:13:42,492 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:13:42,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:13:42,573 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 01:13:42,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:13:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:13:42,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:13:45,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:13:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573536060] [2022-11-26 01:13:45,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573536060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:45,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1572999327] [2022-11-26 01:13:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:45,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:13:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:13:45,615 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:13:45,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-26 01:13:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:45,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:13:45,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:46,112 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:46,112 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:46,267 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:13:46,267 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:13:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:46,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:13:46,505 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:13:46,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:13:46,640 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-26 01:13:46,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-26 01:13:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:13:46,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:13:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1572999327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857851089] [2022-11-26 01:13:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:13:49,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:13:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:13:49,549 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:13:49,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 01:13:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:13:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 01:13:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:13:49,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:13:49,896 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:13:50,041 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:13:50,041 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:13:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:13:50,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:13:50,157 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:13:50,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:13:50,221 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 01:13:50,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:13:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:13:50,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:13:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:13:53,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857851089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:13:53,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:13:53,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 24 [2022-11-26 01:13:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983127156] [2022-11-26 01:13:53,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:13:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:13:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:13:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:13:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-26 01:13:53,913 INFO L87 Difference]: Start difference. First operand 936 states and 3526 transitions. Second operand has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 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) [2022-11-26 01:14:01,963 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:13,333 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:15,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:14:25,516 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:32,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:14:48,496 WARN L233 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 67 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:50,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:14:52,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:14:54,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:14:56,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:14:58,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:00,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:02,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:04,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:06,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:08,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:10,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:12,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:14,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:23,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:25,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:27,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:29,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:31,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:33,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:35,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:37,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:39,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:41,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:43,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:15:45,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:15:47,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:11,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:13,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:16:45,665 WARN L233 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 85 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:17:14,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:23,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:28,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:31,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:35,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:17:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:37,727 INFO L93 Difference]: Finished difference Result 7862 states and 31230 transitions. [2022-11-26 01:17:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 01:17:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 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 10 [2022-11-26 01:17:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:37,753 INFO L225 Difference]: With dead ends: 7862 [2022-11-26 01:17:37,753 INFO L226 Difference]: Without dead ends: 7862 [2022-11-26 01:17:37,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 140.6s TimeCoverageRelationStatistics Valid=723, Invalid=2454, Unknown=15, NotChecked=0, Total=3192 [2022-11-26 01:17:37,755 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2093 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 180 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:37,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2093 Valid, 154 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1505 Invalid, 32 Unknown, 0 Unchecked, 91.8s Time] [2022-11-26 01:17:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7862 states. [2022-11-26 01:17:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7862 to 1353. [2022-11-26 01:17:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1310 states have (on average 4.308396946564885) internal successors, (5644), 1352 states have internal predecessors, (5644), 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) [2022-11-26 01:17:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 5644 transitions. [2022-11-26 01:17:37,865 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 5644 transitions. Word has length 10 [2022-11-26 01:17:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:37,865 INFO L495 AbstractCegarLoop]: Abstraction has 1353 states and 5644 transitions. [2022-11-26 01:17:37,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.72) internal successors, (43), 25 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) [2022-11-26 01:17:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 5644 transitions. [2022-11-26 01:17:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:17:37,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:37,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:17:37,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:38,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:38,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:38,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:17:38,468 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:17:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1585340478, now seen corresponding path program 1 times [2022-11-26 01:17:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761584927] [2022-11-26 01:17:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:38,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:17:38,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:38,470 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:17:38,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-26 01:17:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:17:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:38,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:17:38,699 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 01:17:38,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:17:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:17:38,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:17:38,727 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761584927] [2022-11-26 01:17:38,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761584927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:17:38,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:17:38,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:17:38,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184509268] [2022-11-26 01:17:38,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:17:38,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:17:38,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:38,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:17:38,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:17:38,729 INFO L87 Difference]: Start difference. First operand 1353 states and 5644 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-26 01:17:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:17:38,972 INFO L93 Difference]: Finished difference Result 1125 states and 4424 transitions. [2022-11-26 01:17:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:17:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 01:17:38,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:17:38,975 INFO L225 Difference]: With dead ends: 1125 [2022-11-26 01:17:38,976 INFO L226 Difference]: Without dead ends: 1125 [2022-11-26 01:17:38,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:17:38,976 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:17:38,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:17:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-11-26 01:17:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1125. [2022-11-26 01:17:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1098 states have (on average 4.029143897996357) internal successors, (4424), 1124 states have internal predecessors, (4424), 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) [2022-11-26 01:17:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 4424 transitions. [2022-11-26 01:17:39,001 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 4424 transitions. Word has length 10 [2022-11-26 01:17:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:17:39,001 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 4424 transitions. [2022-11-26 01:17:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-26 01:17:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 4424 transitions. [2022-11-26 01:17:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:17:39,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:17:39,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:17:39,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-26 01:17:39,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:17:39,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:17:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:17:39,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1585340479, now seen corresponding path program 1 times [2022-11-26 01:17:39,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:17:39,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451801870] [2022-11-26 01:17:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:39,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:17:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:17:39,217 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:17:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-26 01:17:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:39,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:17:39,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:39,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:17:39,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:17:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:39,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:17:39,573 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:17:39,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:17:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:17:39,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:40,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:17:40,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:17:40,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451801870] [2022-11-26 01:17:40,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451801870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:40,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450954161] [2022-11-26 01:17:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:40,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:17:40,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:17:40,230 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:17:40,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-26 01:17:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:17:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:40,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:17:40,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:17:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:40,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:17:40,734 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:17:40,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:17:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:17:40,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:41,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:17:41,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450954161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:41,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24978679] [2022-11-26 01:17:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:17:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:17:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:17:41,081 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:17:41,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 01:17:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:17:41,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 01:17:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:17:41,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:17:41,497 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 01:17:41,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:17:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:17:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:17:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:17:42,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24978679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:17:42,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:17:42,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 22 [2022-11-26 01:17:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449694147] [2022-11-26 01:17:42,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:17:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 01:17:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:17:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 01:17:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:17:42,665 INFO L87 Difference]: Start difference. First operand 1125 states and 4424 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) [2022-11-26 01:17:54,461 WARN L233 SmtUtils]: Spent 10.09s on a formula simplification. DAG size of input: 48 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:10,494 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 44 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:18,093 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 54 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:26,857 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:18:39,744 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:01,498 WARN L233 SmtUtils]: Spent 21.39s on a formula simplification. DAG size of input: 60 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:18,541 WARN L233 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 52 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:21,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:19:23,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:19:51,990 WARN L233 SmtUtils]: Spent 26.01s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:55,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:19:58,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:01,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 01:20:03,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:06,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:08,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:10,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:13,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:17,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:19,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:20,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:22,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:24,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:26,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:29,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:31,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:33,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:35,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:37,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:39,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:42,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:44,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:46,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:48,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:50,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:53,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:20:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:53,285 INFO L93 Difference]: Finished difference Result 4913 states and 18790 transitions. [2022-11-26 01:20:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 01:20:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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 10 [2022-11-26 01:20:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:53,303 INFO L225 Difference]: With dead ends: 4913 [2022-11-26 01:20:53,303 INFO L226 Difference]: Without dead ends: 4913 [2022-11-26 01:20:53,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 123.1s TimeCoverageRelationStatistics Valid=510, Invalid=1650, Unknown=2, NotChecked=0, Total=2162 [2022-11-26 01:20:53,304 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1096 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 92 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:53,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 107 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 952 Invalid, 26 Unknown, 0 Unchecked, 69.2s Time] [2022-11-26 01:20:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2022-11-26 01:20:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 1385. [2022-11-26 01:20:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1358 states have (on average 4.074374079528718) internal successors, (5533), 1384 states have internal predecessors, (5533), 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) [2022-11-26 01:20:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 5533 transitions. [2022-11-26 01:20:53,368 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 5533 transitions. Word has length 10 [2022-11-26 01:20:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:53,368 INFO L495 AbstractCegarLoop]: Abstraction has 1385 states and 5533 transitions. [2022-11-26 01:20:53,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) [2022-11-26 01:20:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 5533 transitions. [2022-11-26 01:20:53,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 01:20:53,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:53,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:20:53,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-11-26 01:20:53,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:53,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:20:53,974 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:20:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 371439131, now seen corresponding path program 1 times [2022-11-26 01:20:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:53,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242340817] [2022-11-26 01:20:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:53,976 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:20:53,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-26 01:20:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:20:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:20:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:20:54,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:20:54,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:20:54,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242340817] [2022-11-26 01:20:54,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242340817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:20:54,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:20:54,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:20:54,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479556721] [2022-11-26 01:20:54,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:20:54,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:20:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:20:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:20:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:20:54,313 INFO L87 Difference]: Start difference. First operand 1385 states and 5533 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-26 01:20:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:54,852 INFO L93 Difference]: Finished difference Result 2041 states and 8402 transitions. [2022-11-26 01:20:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:20:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 11 [2022-11-26 01:20:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:54,859 INFO L225 Difference]: With dead ends: 2041 [2022-11-26 01:20:54,859 INFO L226 Difference]: Without dead ends: 2041 [2022-11-26 01:20:54,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:20:54,860 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:54,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 7 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:20:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2022-11-26 01:20:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1603. [2022-11-26 01:20:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1576 states have (on average 4.347715736040609) internal successors, (6852), 1602 states have internal predecessors, (6852), 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) [2022-11-26 01:20:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 6852 transitions. [2022-11-26 01:20:54,903 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 6852 transitions. Word has length 11 [2022-11-26 01:20:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:54,903 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 6852 transitions. [2022-11-26 01:20:54,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-26 01:20:54,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 6852 transitions. [2022-11-26 01:20:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:20:54,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:54,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:20:54,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-26 01:20:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:55,116 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:20:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:55,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1193344484, now seen corresponding path program 1 times [2022-11-26 01:20:55,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:20:55,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164583428] [2022-11-26 01:20:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:55,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:20:55,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:20:55,118 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:20:55,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-26 01:20:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:20:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:55,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:20:55,500 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:20:55,682 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:20:55,683 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:20:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:55,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:20:55,870 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:20:55,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:20:55,954 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 01:20:55,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:20:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:20:56,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:21:01,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:21:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164583428] [2022-11-26 01:21:01,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164583428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:21:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1242691760] [2022-11-26 01:21:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:21:01,020 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:21:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:21:01,022 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:21:01,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-26 01:21:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:21:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:21:01,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:01,512 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:21:01,513 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:21:01,665 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:21:01,665 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:21:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:21:01,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:21:01,878 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:21:01,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:21:02,022 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-26 01:21:02,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-26 01:21:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:21:02,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:21:06,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1242691760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:21:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047660048] [2022-11-26 01:21:06,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:21:06,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:21:06,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:21:06,681 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:21:06,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-26 01:21:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:21:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 01:21:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:21:07,011 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 01:21:07,011 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 01:21:07,163 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 01:21:07,164 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 01:21:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:21:07,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:21:07,284 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:21:07,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:21:07,336 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 01:21:07,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:21:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:21:07,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:21:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:21:10,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047660048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:21:10,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:21:10,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 24 [2022-11-26 01:21:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931623603] [2022-11-26 01:21:10,334 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:21:10,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:21:10,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:21:10,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:21:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=516, Unknown=1, NotChecked=0, Total=650 [2022-11-26 01:21:10,336 INFO L87 Difference]: Start difference. First operand 1603 states and 6852 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:21:17,287 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:21:29,108 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 59 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:21:30,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:21:38,798 WARN L233 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 54 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:00,966 WARN L233 SmtUtils]: Spent 16.43s on a formula simplification. DAG size of input: 82 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:10,155 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:20,316 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 70 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:28,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:22:35,756 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:49,201 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 76 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:22:51,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:22:57,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:22:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:22:58,491 INFO L93 Difference]: Finished difference Result 6549 states and 26510 transitions. [2022-11-26 01:22:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 01:22:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 01:22:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:22:58,510 INFO L225 Difference]: With dead ends: 6549 [2022-11-26 01:22:58,510 INFO L226 Difference]: Without dead ends: 6549 [2022-11-26 01:22:58,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 99.4s TimeCoverageRelationStatistics Valid=591, Invalid=1954, Unknown=5, NotChecked=0, Total=2550 [2022-11-26 01:22:58,511 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1886 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 219 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1886 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:22:58,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1886 Valid, 118 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1220 Invalid, 3 Unknown, 0 Unchecked, 20.5s Time] [2022-11-26 01:22:58,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2022-11-26 01:22:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 2014. [2022-11-26 01:22:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 1987 states have (on average 4.320583794665325) internal successors, (8585), 2013 states have internal predecessors, (8585), 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) [2022-11-26 01:22:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 8585 transitions. [2022-11-26 01:22:58,600 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 8585 transitions. Word has length 12 [2022-11-26 01:22:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:22:58,600 INFO L495 AbstractCegarLoop]: Abstraction has 2014 states and 8585 transitions. [2022-11-26 01:22:58,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:22:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 8585 transitions. [2022-11-26 01:22:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:22:58,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:22:58,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:22:58,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:58,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-26 01:22:59,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-26 01:22:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 01:22:59,210 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-26 01:22:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:22:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1193344482, now seen corresponding path program 1 times [2022-11-26 01:22:59,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 01:22:59,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399668912] [2022-11-26 01:22:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:22:59,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 01:22:59,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 01:22:59,214 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 01:22:59,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-26 01:22:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:22:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 01:22:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:22:59,490 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 7 [2022-11-26 01:22:59,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:22:59,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:59,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:22:59,566 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:22:59,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:22:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:59,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:23:00,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:23:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:23:00,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 01:23:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399668912] [2022-11-26 01:23:00,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399668912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:23:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [174638831] [2022-11-26 01:23:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:23:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 01:23:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 01:23:00,279 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 01:23:00,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-26 01:23:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:23:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:23:00,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:23:00,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 01:23:00,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:23:00,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:23:00,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:23:00,843 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 01:23:00,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 01:23:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:23:00,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:23:01,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:23:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:23:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [174638831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:23:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670407088] [2022-11-26 01:23:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:23:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:23:01,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:23:01,217 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:23:01,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc46f60d-f5e7-4407-bb1d-ce7844985557/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-26 01:23:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:23:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 01:23:01,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:23:01,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 01:23:01,643 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-26 01:23:01,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 01:23:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:23:01,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:23:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:23:03,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670407088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:23:03,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 01:23:03,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 22 [2022-11-26 01:23:03,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953923311] [2022-11-26 01:23:03,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 01:23:03,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 01:23:03,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 01:23:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 01:23:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:23:03,032 INFO L87 Difference]: Start difference. First operand 2014 states and 8585 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 23 states have internal predecessors, (41), 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) [2022-11-26 01:23:24,884 WARN L233 SmtUtils]: Spent 18.99s on a formula simplification. DAG size of input: 48 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:37,758 WARN L233 SmtUtils]: Spent 10.21s on a formula simplification. DAG size of input: 43 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:47,441 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 44 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:24:27,060 WARN L233 SmtUtils]: Spent 34.71s on a formula simplification. DAG size of input: 54 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:24:41,543 WARN L233 SmtUtils]: Spent 12.18s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:24:53,351 WARN L233 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:24:55,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:25:31,989 WARN L233 SmtUtils]: Spent 34.35s on a formula simplification. DAG size of input: 52 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:26:03,935 WARN L233 SmtUtils]: Spent 30.43s on a formula simplification. DAG size of input: 60 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:26:06,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:26:34,300 WARN L233 SmtUtils]: Spent 26.63s on a formula simplification. DAG size of input: 58 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:26:37,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:26:39,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:26:42,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 01:26:45,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]