./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:22:31,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:22:31,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:22:31,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:22:31,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:22:31,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:22:31,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:22:31,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:22:31,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:22:31,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:22:31,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:22:31,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:22:31,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:22:31,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:22:31,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:22:31,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:22:31,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:22:31,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:22:31,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:22:31,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:22:31,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:22:31,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:22:31,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:22:31,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:22:31,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:22:31,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:22:31,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:22:31,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:22:31,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:22:31,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:22:31,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:22:31,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:22:31,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:22:31,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:22:31,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:22:31,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:22:31,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:22:31,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:22:31,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:22:31,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:22:31,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:22:31,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-12-14 12:22:31,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:22:31,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:22:31,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:22:31,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:22:31,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:22:31,662 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:22:31,662 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:22:31,663 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:22:31,663 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:22:31,663 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:22:31,663 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:22:31,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:22:31,663 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:22:31,663 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:22:31,664 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:22:31,664 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:22:31,664 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:22:31,664 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:22:31,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:22:31,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:22:31,665 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:22:31,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:22:31,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:22:31,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:22:31,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:22:31,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:22:31,667 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:22:31,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:22:31,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:22:31,667 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_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2022-12-14 12:22:31,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:22:31,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:22:31,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:22:31,885 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:22:31,886 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:22:31,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-properties/list_search-1.i [2022-12-14 12:22:34,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:22:34,596 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:22:34,597 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/sv-benchmarks/c/list-properties/list_search-1.i [2022-12-14 12:22:34,605 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data/7e85a2da0/c7a49dffde81426693e9834fe1b792bb/FLAG031ca7ae6 [2022-12-14 12:22:34,992 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data/7e85a2da0/c7a49dffde81426693e9834fe1b792bb [2022-12-14 12:22:34,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:22:35,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:22:35,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:22:35,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:22:35,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:22:35,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:22:34" (1/1) ... [2022-12-14 12:22:35,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcecc4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:35, skipping insertion in model container [2022-12-14 12:22:35,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:22:34" (1/1) ... [2022-12-14 12:22:35,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:22:35,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:22:35,163 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_f9f675a7-f614-47ef-93e5-55894d291eb7/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-12-14 12:22:35,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:22:35,265 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 12:22:35,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73c80db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:35, skipping insertion in model container [2022-12-14 12:22:35,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:22:35,266 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 12:22:35,267 INFO L158 Benchmark]: Toolchain (without parser) took 267.18ms. Allocated memory is still 123.7MB. Free memory was 87.4MB in the beginning and 75.3MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 12:22:35,268 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 90.0MB in the end (delta: 24.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:22:35,268 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.11ms. Allocated memory is still 123.7MB. Free memory was 86.8MB in the beginning and 75.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 12:22:35,269 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 90.0MB in the end (delta: 24.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 264.11ms. Allocated memory is still 123.7MB. Free memory was 86.8MB in the beginning and 75.3MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 542]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:22:36,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:22:36,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:22:36,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:22:36,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:22:36,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:22:36,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:22:36,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:22:36,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:22:36,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:22:36,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:22:36,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:22:36,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:22:36,581 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:22:36,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:22:36,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:22:36,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:22:36,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:22:36,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:22:36,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:22:36,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:22:36,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:22:36,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:22:36,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:22:36,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:22:36,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:22:36,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:22:36,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:22:36,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:22:36,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:22:36,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:22:36,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:22:36,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:22:36,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:22:36,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:22:36,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:22:36,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:22:36,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:22:36,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:22:36,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:22:36,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:22:36,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2022-12-14 12:22:36,633 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:22:36,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:22:36,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:22:36,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:22:36,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:22:36,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:22:36,635 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:22:36,635 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:22:36,635 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:22:36,636 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:22:36,636 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:22:36,636 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:22:36,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:22:36,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:22:36,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:22:36,637 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:22:36,637 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:22:36,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:22:36,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:22:36,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:22:36,638 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:22:36,638 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:22:36,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:22:36,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:22:36,639 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 12:22:36,639 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 12:22:36,639 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:22:36,640 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:22:36,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:22:36,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 12:22:36,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:22:36,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:22:36,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:22:36,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:22:36,641 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 12:22:36,641 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 12:22:36,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:22:36,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 12:22:36,642 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_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2022-12-14 12:22:36,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:22:36,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:22:36,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:22:36,900 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:22:36,900 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:22:36,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-properties/list_search-1.i [2022-12-14 12:22:39,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:22:39,741 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:22:39,741 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/sv-benchmarks/c/list-properties/list_search-1.i [2022-12-14 12:22:39,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data/4a87d2b88/451427b8d1854f7b8cf96f0a57a0328a/FLAGa4f4eea24 [2022-12-14 12:22:39,761 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/data/4a87d2b88/451427b8d1854f7b8cf96f0a57a0328a [2022-12-14 12:22:39,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:22:39,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:22:39,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:22:39,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:22:39,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:22:39,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:22:39" (1/1) ... [2022-12-14 12:22:39,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@efd4757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:39, skipping insertion in model container [2022-12-14 12:22:39,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:22:39" (1/1) ... [2022-12-14 12:22:39,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:22:39,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:22:39,918 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_f9f675a7-f614-47ef-93e5-55894d291eb7/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-12-14 12:22:39,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:22:40,006 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 12:22:40,011 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:22:40,013 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_f9f675a7-f614-47ef-93e5-55894d291eb7/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-12-14 12:22:40,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:22:40,034 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:22:40,055 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_f9f675a7-f614-47ef-93e5-55894d291eb7/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-12-14 12:22:40,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:22:40,109 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:22:40,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40 WrapperNode [2022-12-14 12:22:40,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:22:40,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:22:40,111 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:22:40,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:22:40,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,151 INFO L138 Inliner]: procedures = 128, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-12-14 12:22:40,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:22:40,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:22:40,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:22:40,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:22:40,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:22:40,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:22:40,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:22:40,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:22:40,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (1/1) ... [2022-12-14 12:22:40,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:22:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:40,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:22:40,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:22:40,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 12:22:40,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:22:40,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2022-12-14 12:22:40,237 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 12:22:40,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:22:40,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:22:40,325 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:22:40,326 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:22:40,570 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:22:40,574 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:22:40,575 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:22:40,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:22:40 BoogieIcfgContainer [2022-12-14 12:22:40,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:22:40,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:22:40,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:22:40,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:22:40,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:22:39" (1/3) ... [2022-12-14 12:22:40,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac60b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:22:40, skipping insertion in model container [2022-12-14 12:22:40,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:40" (2/3) ... [2022-12-14 12:22:40,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac60b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:22:40, skipping insertion in model container [2022-12-14 12:22:40,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:22:40" (3/3) ... [2022-12-14 12:22:40,582 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2022-12-14 12:22:40,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:22:40,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-12-14 12:22:40,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:22:40,631 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;@1b7bd026, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:22:40,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-12-14 12:22:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:22:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:22:40,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:40,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:22:40,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:40,644 INFO L85 PathProgramCache]: Analyzing trace with hash 48806309, now seen corresponding path program 1 times [2022-12-14 12:22:40,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:40,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971594789] [2022-12-14 12:22:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:40,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:40,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:40,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:40,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 12:22:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:22:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:40,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:40,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:40,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971594789] [2022-12-14 12:22:40,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971594789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:40,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:40,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:22:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477018593] [2022-12-14 12:22:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:22:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:22:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:22:40,814 INFO L87 Difference]: Start difference. First operand has 63 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:40,924 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-12-14 12:22:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:22:40,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 12:22:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:40,939 INFO L225 Difference]: With dead ends: 59 [2022-12-14 12:22:40,939 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 12:22:40,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:22:40,944 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:40,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:22:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 12:22:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 12:22:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:22:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-12-14 12:22:40,970 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 5 [2022-12-14 12:22:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:40,971 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-12-14 12:22:40,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-12-14 12:22:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:22:40,971 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:40,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 12:22:40,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:22:41,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:41,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:41,177 INFO L85 PathProgramCache]: Analyzing trace with hash 48806310, now seen corresponding path program 1 times [2022-12-14 12:22:41,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:41,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070210466] [2022-12-14 12:22:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:41,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:41,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:41,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:41,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 12:22:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 12:22:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:22:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:22:41,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:41,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:41,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070210466] [2022-12-14 12:22:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070210466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:41,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:41,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:22:41,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465565166] [2022-12-14 12:22:41,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:41,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:22:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:22:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:22:41,332 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:41,420 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-12-14 12:22:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:22:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 12:22:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:41,422 INFO L225 Difference]: With dead ends: 53 [2022-12-14 12:22:41,422 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 12:22:41,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:22:41,423 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:41,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:22:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 12:22:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-14 12:22:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.457142857142857) internal successors, (51), 47 states have internal predecessors, (51), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:22:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-12-14 12:22:41,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 5 [2022-12-14 12:22:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:41,431 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-12-14 12:22:41,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:41,431 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-12-14 12:22:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 12:22:41,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:41,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:41,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 12:22:41,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:41,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1546335105, now seen corresponding path program 1 times [2022-12-14 12:22:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:41,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018262063] [2022-12-14 12:22:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:41,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:41,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:41,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:41,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 12:22:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:22:41,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:22:41,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:22:42,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018262063] [2022-12-14 12:22:42,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018262063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [258077036] [2022-12-14 12:22:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:22:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:22:42,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:22:42,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 12:22:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:42,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:22:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:22:42,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:22:42,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [258077036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:42,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667469179] [2022-12-14 12:22:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:42,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:42,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:42,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:42,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:22:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:22:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:22:42,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:22:42,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667469179] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:42,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:22:42,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 7 [2022-12-14 12:22:42,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753864743] [2022-12-14 12:22:42,602 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:42,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:22:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:42,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:22:42,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:22:42,603 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:22:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:42,806 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-12-14 12:22:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:22:42,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-12-14 12:22:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:42,809 INFO L225 Difference]: With dead ends: 72 [2022-12-14 12:22:42,809 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 12:22:42,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:22:42,810 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 95 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:42,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 162 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:22:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 12:22:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-12-14 12:22:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:22:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-12-14 12:22:42,819 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 41 [2022-12-14 12:22:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:42,819 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-12-14 12:22:42,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:22:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-12-14 12:22:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 12:22:42,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:42,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:42,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 12:22:43,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-12-14 12:22:43,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:22:43,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:43,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1413963380, now seen corresponding path program 1 times [2022-12-14 12:22:43,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:43,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475111175] [2022-12-14 12:22:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:43,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:43,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:43,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 12:22:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:22:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:43,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:43,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:43,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:43,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475111175] [2022-12-14 12:22:43,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475111175] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:43,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:43,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:22:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603798670] [2022-12-14 12:22:43,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:43,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:22:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:22:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:22:43,657 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:43,886 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-12-14 12:22:43,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:22:43,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-12-14 12:22:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:43,888 INFO L225 Difference]: With dead ends: 90 [2022-12-14 12:22:43,888 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 12:22:43,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:22:43,889 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 99 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:43,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 80 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:22:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 12:22:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2022-12-14 12:22:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.425531914893617) internal successors, (67), 58 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:22:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-12-14 12:22:43,897 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 44 [2022-12-14 12:22:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:43,897 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-12-14 12:22:43,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:43,898 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-12-14 12:22:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 12:22:43,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:43,898 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:43,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 12:22:44,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:44,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1413963379, now seen corresponding path program 1 times [2022-12-14 12:22:44,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516033371] [2022-12-14 12:22:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:44,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:44,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:44,107 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:44,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 12:22:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:22:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:44,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:22:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:44,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:44,436 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516033371] [2022-12-14 12:22:44,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516033371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:44,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:44,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:22:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351238881] [2022-12-14 12:22:44,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 12:22:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:44,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 12:22:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:22:44,438 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:44,673 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-12-14 12:22:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:22:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-12-14 12:22:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:44,674 INFO L225 Difference]: With dead ends: 106 [2022-12-14 12:22:44,674 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 12:22:44,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:22:44,675 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 104 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:44,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 91 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:22:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 12:22:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2022-12-14 12:22:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 63 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:22:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2022-12-14 12:22:44,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 44 [2022-12-14 12:22:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:44,679 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2022-12-14 12:22:44,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2022-12-14 12:22:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:22:44,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:44,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:44,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 12:22:44,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:44,882 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1662023696, now seen corresponding path program 1 times [2022-12-14 12:22:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719063718] [2022-12-14 12:22:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:44,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:44,889 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:44,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 12:22:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 12:22:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:45,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:45,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:45,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719063718] [2022-12-14 12:22:45,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719063718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:45,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:45,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:22:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950025896] [2022-12-14 12:22:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:45,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:22:45,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:22:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:22:45,160 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:45,373 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2022-12-14 12:22:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:22:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-12-14 12:22:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:45,374 INFO L225 Difference]: With dead ends: 106 [2022-12-14 12:22:45,374 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 12:22:45,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:22:45,375 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 110 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:45,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 164 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:22:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 12:22:45,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2022-12-14 12:22:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 63 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:22:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2022-12-14 12:22:45,381 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 47 [2022-12-14 12:22:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:45,381 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2022-12-14 12:22:45,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2022-12-14 12:22:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 12:22:45,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:45,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:45,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 12:22:45,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:45,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1825916083, now seen corresponding path program 1 times [2022-12-14 12:22:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:45,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162520358] [2022-12-14 12:22:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:45,585 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:45,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:45,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:45,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 12:22:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:22:45,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:45,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:22:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:45,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:45,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:45,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162520358] [2022-12-14 12:22:45,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162520358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:45,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:45,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:22:45,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588922928] [2022-12-14 12:22:45,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:45,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:22:45,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:45,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:22:45,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:22:45,894 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:46,275 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-12-14 12:22:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:22:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-12-14 12:22:46,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:46,277 INFO L225 Difference]: With dead ends: 105 [2022-12-14 12:22:46,277 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 12:22:46,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:22:46,278 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 150 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:46,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 139 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:22:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 12:22:46,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2022-12-14 12:22:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 66 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:22:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-12-14 12:22:46,284 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 49 [2022-12-14 12:22:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:46,284 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-12-14 12:22:46,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-12-14 12:22:46,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 12:22:46,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:46,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:46,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 12:22:46,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:46,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1825916084, now seen corresponding path program 1 times [2022-12-14 12:22:46,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:46,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618966361] [2022-12-14 12:22:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:46,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:46,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:46,493 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:46,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 12:22:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:46,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:22:46,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:46,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:46,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:46,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618966361] [2022-12-14 12:22:46,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618966361] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:46,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:46,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:22:46,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635501512] [2022-12-14 12:22:46,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:22:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:46,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:22:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:22:46,783 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:47,100 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-12-14 12:22:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:22:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-12-14 12:22:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:47,102 INFO L225 Difference]: With dead ends: 96 [2022-12-14 12:22:47,102 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 12:22:47,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:22:47,103 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 125 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:47,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 132 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:22:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 12:22:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2022-12-14 12:22:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 69 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 12:22:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-12-14 12:22:47,108 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 49 [2022-12-14 12:22:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:47,109 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-12-14 12:22:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:22:47,109 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-12-14 12:22:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 12:22:47,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:47,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:47,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 12:22:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:47,311 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1986857552, now seen corresponding path program 1 times [2022-12-14 12:22:47,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:47,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029094806] [2022-12-14 12:22:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:47,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:47,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 12:22:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 12:22:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:47,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:47,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:47,754 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 12:22:47,754 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 20 treesize of output 26 [2022-12-14 12:22:47,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:22:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:48,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029094806] [2022-12-14 12:22:48,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029094806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:48,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1926364119] [2022-12-14 12:22:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:48,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:22:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:22:48,230 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:22:48,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 12:22:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 12:22:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:48,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:48,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:48,740 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 12:22:48,740 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 20 treesize of output 26 [2022-12-14 12:22:48,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 12:22:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:49,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1926364119] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:49,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797432027] [2022-12-14 12:22:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:49,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:49,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:49,006 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:49,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:22:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 12:22:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:49,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:49,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:49,398 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:22:49,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-12-14 12:22:49,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-12-14 12:22:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:49,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:49,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797432027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:22:49,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:22:49,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 21 [2022-12-14 12:22:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699148623] [2022-12-14 12:22:49,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:49,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 12:22:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 12:22:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:22:49,748 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:22:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:51,227 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-12-14 12:22:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:22:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-12-14 12:22:51,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:51,229 INFO L225 Difference]: With dead ends: 127 [2022-12-14 12:22:51,229 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 12:22:51,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 276 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:22:51,230 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 332 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:51,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 248 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:22:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 12:22:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2022-12-14 12:22:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 76 states have internal predecessors, (87), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:22:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-12-14 12:22:51,236 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 51 [2022-12-14 12:22:51,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:51,236 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-12-14 12:22:51,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:22:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-12-14 12:22:51,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 12:22:51,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:51,237 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:51,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 12:22:51,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:22:51,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-14 12:22:51,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:51,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:51,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1986857553, now seen corresponding path program 1 times [2022-12-14 12:22:51,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:51,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246449756] [2022-12-14 12:22:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:51,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:51,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:51,843 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:51,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 12:22:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:52,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 12:22:52,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:52,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:22:52,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:52,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:52,366 INFO L321 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-12-14 12:22:52,366 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 18 treesize of output 20 [2022-12-14 12:22:52,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:22:52,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 12:22:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:52,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:53,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:53,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246449756] [2022-12-14 12:22:53,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246449756] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:53,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2132120281] [2022-12-14 12:22:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:53,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:22:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:22:53,158 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:22:53,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 12:22:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 12:22:53,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:53,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:53,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:22:53,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:53,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:54,117 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:22:54,117 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 18 treesize of output 30 [2022-12-14 12:22:54,133 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:22:54,133 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 19 treesize of output 19 [2022-12-14 12:22:54,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:22:54,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 12:22:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:54,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:55,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2132120281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:55,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374412612] [2022-12-14 12:22:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:55,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:55,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:55,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:55,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:22:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 12:22:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:55,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:22:55,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:22:55,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:55,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:22:55,636 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:22:55,636 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 18 treesize of output 30 [2022-12-14 12:22:55,654 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:22:55,654 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 19 treesize of output 19 [2022-12-14 12:22:55,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:22:55,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 12:22:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:22:55,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:22:56,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374412612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:56,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:22:56,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-14 12:22:56,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112020187] [2022-12-14 12:22:56,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:22:56,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:22:56,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:22:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-12-14 12:22:56,371 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:22:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:58,795 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2022-12-14 12:22:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:22:58,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-12-14 12:22:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:58,796 INFO L225 Difference]: With dead ends: 155 [2022-12-14 12:22:58,796 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 12:22:58,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 12:22:58,797 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 356 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:58,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 263 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 12:22:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 12:22:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 86. [2022-12-14 12:22:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 79 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:22:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-12-14 12:22:58,800 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 51 [2022-12-14 12:22:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:58,801 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-12-14 12:22:58,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 12:22:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-12-14 12:22:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 12:22:58,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:58,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:58,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:22:59,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 12:22:59,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 12:22:59,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:59,405 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:22:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash -105219752, now seen corresponding path program 1 times [2022-12-14 12:22:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:22:59,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760654084] [2022-12-14 12:22:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:59,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:22:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:22:59,409 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:22:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 12:22:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:22:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:59,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2022-12-14 12:22:59,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-14 12:22:59,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:22:59,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 13 [2022-12-14 12:22:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:59,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:22:59,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:22:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760654084] [2022-12-14 12:22:59,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760654084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:59,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:59,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 12:22:59,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110836774] [2022-12-14 12:22:59,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:22:59,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:22:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:22:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 12:22:59,853 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:23:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:00,269 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2022-12-14 12:23:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 12:23:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-12-14 12:23:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:00,270 INFO L225 Difference]: With dead ends: 86 [2022-12-14 12:23:00,270 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 12:23:00,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:23:00,271 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 56 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:00,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 222 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:23:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 12:23:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2022-12-14 12:23:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.323076923076923) internal successors, (86), 76 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:23:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-12-14 12:23:00,275 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 52 [2022-12-14 12:23:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:00,276 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-12-14 12:23:00,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 12:23:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-12-14 12:23:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:23:00,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:00,276 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:00,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 12:23:00,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:23:00,478 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:23:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1534863564, now seen corresponding path program 1 times [2022-12-14 12:23:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:23:00,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068063646] [2022-12-14 12:23:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:23:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:23:00,483 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:23:00,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 12:23:00,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:23:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:00,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:00,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 12:23:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:00,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:01,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:23:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068063646] [2022-12-14 12:23:01,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068063646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [403777893] [2022-12-14 12:23:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:01,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:23:01,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:23:01,191 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:23:01,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 12:23:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:23:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:01,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:01,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 12:23:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:01,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [403777893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:01,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129209300] [2022-12-14 12:23:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:01,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:01,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:01,705 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:01,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 12:23:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:01,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 12:23:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:01,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:01,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 12:23:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:01,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:02,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129209300] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:02,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:23:02,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 12, 13, 12] total 18 [2022-12-14 12:23:02,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664524915] [2022-12-14 12:23:02,085 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:23:02,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 12:23:02,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:23:02,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 12:23:02,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:23:02,086 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:23:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:03,102 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-12-14 12:23:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:23:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-12-14 12:23:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:03,104 INFO L225 Difference]: With dead ends: 123 [2022-12-14 12:23:03,104 INFO L226 Difference]: Without dead ends: 123 [2022-12-14 12:23:03,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:23:03,104 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:03,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 341 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:23:03,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-14 12:23:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 82. [2022-12-14 12:23:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.296875) internal successors, (83), 75 states have internal predecessors, (83), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:23:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2022-12-14 12:23:03,107 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 54 [2022-12-14 12:23:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:03,107 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2022-12-14 12:23:03,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:23:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2022-12-14 12:23:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 12:23:03,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:03,108 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:03,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 12:23:03,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 12:23:03,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-12-14 12:23:03,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:23:03,710 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:23:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:03,711 INFO L85 PathProgramCache]: Analyzing trace with hash 527248649, now seen corresponding path program 1 times [2022-12-14 12:23:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:23:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432347439] [2022-12-14 12:23:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:23:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:23:03,716 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:23:03,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 12:23:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:03,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 12:23:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:04,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:04,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:23:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:04,429 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 8 treesize of output 6 [2022-12-14 12:23:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:05,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:23:05,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432347439] [2022-12-14 12:23:05,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432347439] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:05,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1568734511] [2022-12-14 12:23:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:05,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:23:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:23:05,503 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:23:05,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 12:23:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 12:23:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:05,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:05,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:06,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:23:06,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 12:23:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:06,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:06,236 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 8 treesize of output 6 [2022-12-14 12:23:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:06,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1568734511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:06,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893965455] [2022-12-14 12:23:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:23:06,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:06,551 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:06,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 12:23:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:23:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 12:23:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:06,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:06,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:23:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:06,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:06,871 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 8 treesize of output 6 [2022-12-14 12:23:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:23:07,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893965455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:23:07,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 12:23:07,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 14, 13] total 30 [2022-12-14 12:23:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230531292] [2022-12-14 12:23:07,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 12:23:07,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 12:23:07,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:23:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 12:23:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-12-14 12:23:07,111 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:23:10,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:10,570 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-12-14 12:23:10,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 12:23:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2022-12-14 12:23:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:10,571 INFO L225 Difference]: With dead ends: 142 [2022-12-14 12:23:10,571 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 12:23:10,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=471, Invalid=2609, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:23:10,572 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 445 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:10,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 554 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 12:23:10,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 12:23:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 82. [2022-12-14 12:23:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.28125) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:23:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-12-14 12:23:10,574 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 56 [2022-12-14 12:23:10,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:10,574 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-12-14 12:23:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 3 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 12:23:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-12-14 12:23:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:23:10,575 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:10,575 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:10,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 12:23:10,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 12:23:10,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-14 12:23:11,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:23:11,178 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:23:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash -69599988, now seen corresponding path program 2 times [2022-12-14 12:23:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:23:11,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595333630] [2022-12-14 12:23:11,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:23:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:23:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:23:11,181 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:23:11,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 12:23:11,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:23:11,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:11,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 12:23:11,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:11,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:23:11,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:11,908 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:23:11,908 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 25 treesize of output 39 [2022-12-14 12:23:12,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:12,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:12,270 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:23:12,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-12-14 12:23:12,284 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-14 12:23:12,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 12:23:12,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-12-14 12:23:12,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:23:13,002 INFO L321 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2022-12-14 12:23:13,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 87 [2022-12-14 12:23:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:13,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:13,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:13,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-12-14 12:23:13,690 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_263 (_ BitVec 32)) (v_arrayElimArr_2 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select v_arrayElimArr_2 (_ bv4 32)) c_~head~0.base)) (= (_ bv0 1) (bvadd (select (store |c_#valid| v_~head~0.base_263 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_263 v_arrayElimArr_2) c_~head~0.base) (bvadd c_~head~0.offset (_ bv4 32)))) (_ bv1 1))))) is different from false [2022-12-14 12:23:13,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:23:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595333630] [2022-12-14 12:23:13,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595333630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:13,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087434099] [2022-12-14 12:23:13,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:23:13,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:23:13,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:23:13,693 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:23:13,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 12:23:14,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:23:14,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 12:23:14,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:14,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:23:14,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:14,507 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:23:14,507 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 25 treesize of output 39 [2022-12-14 12:23:14,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:14,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:15,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 12:23:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:15,207 INFO L321 Elim1Store]: treesize reduction 52, result has 38.1 percent of original size [2022-12-14 12:23:15,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 65 [2022-12-14 12:23:15,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:23:15,988 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:23:15,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2022-12-14 12:23:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:16,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:16,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:16,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-12-14 12:23:18,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087434099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955452851] [2022-12-14 12:23:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:23:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:18,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:18,881 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:18,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 12:23:19,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:23:19,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 12:23:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:19,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:23:19,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:19,456 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:23:19,456 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 25 treesize of output 39 [2022-12-14 12:23:19,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:19,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:20,114 INFO L321 Elim1Store]: treesize reduction 80, result has 37.0 percent of original size [2022-12-14 12:23:20,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 67 [2022-12-14 12:23:20,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-12-14 12:23:20,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:23:20,835 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 12:23:20,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2022-12-14 12:23:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:21,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:21,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:21,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-12-14 12:23:22,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955452851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:22,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:23:22,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 43 [2022-12-14 12:23:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693974057] [2022-12-14 12:23:22,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:23:22,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 12:23:22,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:23:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 12:23:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2225, Unknown=39, NotChecked=96, Total=2550 [2022-12-14 12:23:22,141 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 44 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 39 states have internal predecessors, (109), 4 states have call successors, (5), 3 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:23:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:23:27,608 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2022-12-14 12:23:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 12:23:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 39 states have internal predecessors, (109), 4 states have call successors, (5), 3 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 58 [2022-12-14 12:23:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:23:27,609 INFO L225 Difference]: With dead ends: 139 [2022-12-14 12:23:27,609 INFO L226 Difference]: Without dead ends: 139 [2022-12-14 12:23:27,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=472, Invalid=4169, Unknown=55, NotChecked=134, Total=4830 [2022-12-14 12:23:27,610 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 440 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 34 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:23:27,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 488 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1286 Invalid, 27 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 12:23:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-12-14 12:23:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2022-12-14 12:23:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 80 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:23:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2022-12-14 12:23:27,612 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 58 [2022-12-14 12:23:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:23:27,613 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2022-12-14 12:23:27,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.5348837209302326) internal successors, (109), 39 states have internal predecessors, (109), 4 states have call successors, (5), 3 states have call predecessors, (5), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 12:23:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2022-12-14 12:23:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 12:23:27,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:23:27,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:23:27,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 12:23:27,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-12-14 12:23:28,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 12:23:28,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:23:28,216 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:23:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:23:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash -69599987, now seen corresponding path program 2 times [2022-12-14 12:23:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:23:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687484754] [2022-12-14 12:23:28,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:23:28,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:23:28,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:23:28,219 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:23:28,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 12:23:28,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:23:28,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:28,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:23:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:28,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:23:28,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:23:28,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:28,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:29,049 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:23:29,050 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 18 treesize of output 30 [2022-12-14 12:23:29,071 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:23:29,071 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 25 treesize of output 39 [2022-12-14 12:23:29,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:29,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:29,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-12-14 12:23:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:29,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 12:23:29,632 INFO L321 Elim1Store]: treesize reduction 45, result has 25.0 percent of original size [2022-12-14 12:23:29,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 12:23:29,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:29,653 INFO L321 Elim1Store]: treesize reduction 6, result has 70.0 percent of original size [2022-12-14 12:23:29,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 12:23:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:30,440 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-14 12:23:30,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-12-14 12:23:30,454 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:23:30,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 12:23:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:30,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:32,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:32,047 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2022-12-14 12:23:32,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:32,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 12:23:32,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 12:23:36,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:23:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687484754] [2022-12-14 12:23:36,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687484754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098075804] [2022-12-14 12:23:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:23:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:23:36,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:23:36,206 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:23:36,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 12:23:36,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:23:36,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:23:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:36,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:23:36,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:23:37,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:37,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:37,922 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:23:37,922 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 18 treesize of output 30 [2022-12-14 12:23:38,089 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:23:38,089 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 25 treesize of output 39 [2022-12-14 12:23:38,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:38,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:39,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:39,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-12-14 12:23:39,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:39,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:23:39,510 INFO L321 Elim1Store]: treesize reduction 69, result has 25.0 percent of original size [2022-12-14 12:23:39,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 12:23:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:39,629 INFO L321 Elim1Store]: treesize reduction 6, result has 78.6 percent of original size [2022-12-14 12:23:39,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2022-12-14 12:23:41,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:41,805 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-14 12:23:41,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-12-14 12:23:41,870 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:23:41,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 12:23:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:42,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:43,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:43,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2022-12-14 12:23:43,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:43,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 12:23:43,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 12:23:47,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098075804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:47,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948319130] [2022-12-14 12:23:47,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:23:47,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:23:47,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:23:47,907 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:23:47,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 12:23:48,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:23:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:23:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:23:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:23:48,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:23:48,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:23:49,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:49,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:23:49,616 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:23:49,616 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 18 treesize of output 30 [2022-12-14 12:23:49,789 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:23:49,789 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 25 treesize of output 39 [2022-12-14 12:23:50,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:50,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:23:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:51,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-12-14 12:23:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:51,241 INFO L321 Elim1Store]: treesize reduction 6, result has 70.0 percent of original size [2022-12-14 12:23:51,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 12:23:51,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:23:51,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 12:23:51,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 12:23:53,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:23:53,442 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-14 12:23:53,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-12-14 12:23:53,504 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:23:53,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 12:23:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:23:53,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:55,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:55,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2022-12-14 12:23:55,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:23:55,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 12:23:55,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 12:23:59,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948319130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:23:59,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:23:59,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-12-14 12:23:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737980087] [2022-12-14 12:23:59,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:23:59,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:23:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:23:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:23:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=632, Unknown=9, NotChecked=0, Total=702 [2022-12-14 12:23:59,799 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 12:24:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:24:28,122 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2022-12-14 12:24:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 12:24:28,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-12-14 12:24:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:24:28,124 INFO L225 Difference]: With dead ends: 166 [2022-12-14 12:24:28,124 INFO L226 Difference]: Without dead ends: 166 [2022-12-14 12:24:28,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 193 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=297, Invalid=2125, Unknown=28, NotChecked=0, Total=2450 [2022-12-14 12:24:28,125 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 340 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 22 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:24:28,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 524 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1131 Invalid, 12 Unknown, 0 Unchecked, 13.2s Time] [2022-12-14 12:24:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-12-14 12:24:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 90. [2022-12-14 12:24:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 83 states have internal predecessors, (93), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:24:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2022-12-14 12:24:28,133 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 58 [2022-12-14 12:24:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:24:28,133 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2022-12-14 12:24:28,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 12:24:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2022-12-14 12:24:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 12:24:28,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:24:28,135 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:24:28,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-12-14 12:24:28,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 12:24:28,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 12:24:28,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:28,737 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:24:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:24:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 569105948, now seen corresponding path program 1 times [2022-12-14 12:24:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:24:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486403941] [2022-12-14 12:24:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:28,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:24:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:24:28,742 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:24:28,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 12:24:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 12:24:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:29,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2022-12-14 12:24:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:29,696 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:29,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 60 [2022-12-14 12:24:31,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-12-14 12:24:31,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:24:31,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:24:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:31,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 56 [2022-12-14 12:24:32,358 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:24:32,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2022-12-14 12:24:34,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-12-14 12:24:34,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:24:36,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:36,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 81 [2022-12-14 12:24:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:24:37,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:40,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:40,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 75 [2022-12-14 12:24:40,493 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_299 (_ BitVec 32)) (v_arrayElimArr_21 (Array (_ BitVec 32) (_ BitVec 8)))) (or (not (= (_ bv2 32) (let ((.cse0 (select (store |c_#memory_int| v_~head~0.base_299 v_arrayElimArr_21) c_~head~0.base))) (concat (concat (concat (select .cse0 (bvadd c_~head~0.offset (_ bv3 32))) (select .cse0 (bvadd c_~head~0.offset (_ bv2 32)))) (select .cse0 (bvadd c_~head~0.offset (_ bv1 32)))) (select .cse0 c_~head~0.offset))))) (not (= (select v_arrayElimArr_21 (_ bv1 32)) (_ bv0 8))) (not (= (_ bv3 8) (select v_arrayElimArr_21 (_ bv0 32)))) (not (= (_ bv0 8) (select v_arrayElimArr_21 (_ bv2 32)))) (not (= (_ bv0 8) (select v_arrayElimArr_21 (_ bv3 32)))))) is different from false [2022-12-14 12:24:40,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:24:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486403941] [2022-12-14 12:24:40,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486403941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:24:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487399930] [2022-12-14 12:24:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:40,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:24:40,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:24:40,504 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:24:40,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 12:24:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:41,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 12:24:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:41,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:24:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:41,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2022-12-14 12:24:42,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:42,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-12-14 12:24:45,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:24:45,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:24:46,409 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:24:46,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2022-12-14 12:24:46,574 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:24:46,574 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 19 treesize of output 19 [2022-12-14 12:24:48,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2022-12-14 12:24:48,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:24:49,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:49,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:49,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:49,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:24:49,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:49,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 60 treesize of output 34 [2022-12-14 12:24:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:24:50,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:24:52,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1487399930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:24:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193882836] [2022-12-14 12:24:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:24:52,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:24:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:24:52,857 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:24:52,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 12:24:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:24:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 12:24:53,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:24:53,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:24:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:53,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2022-12-14 12:24:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:53,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-14 12:24:55,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:24:55,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:24:56,600 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:24:56,600 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 19 treesize of output 19 [2022-12-14 12:24:56,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:24:58,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-12-14 12:24:58,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-12-14 12:24:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:24:59,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:24:59,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 16 [2022-12-14 12:24:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:24:59,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:02,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193882836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:02,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:25:02,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 42 [2022-12-14 12:25:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937238359] [2022-12-14 12:25:02,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 12:25:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:25:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 12:25:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2184, Unknown=30, NotChecked=94, Total=2450 [2022-12-14 12:25:02,375 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 37 states have internal predecessors, (94), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:25:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:25:26,291 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-12-14 12:25:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 12:25:26,292 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 37 states have internal predecessors, (94), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2022-12-14 12:25:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:25:26,292 INFO L225 Difference]: With dead ends: 98 [2022-12-14 12:25:26,293 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 12:25:26,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=363, Invalid=3897, Unknown=34, NotChecked=128, Total=4422 [2022-12-14 12:25:26,294 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 193 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 25 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:25:26,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 629 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 897 Invalid, 9 Unknown, 0 Unchecked, 8.4s Time] [2022-12-14 12:25:26,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 12:25:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2022-12-14 12:25:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 83 states have internal predecessors, (92), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:25:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-12-14 12:25:26,297 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 59 [2022-12-14 12:25:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:25:26,297 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-12-14 12:25:26,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 37 states have internal predecessors, (94), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:25:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-12-14 12:25:26,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:25:26,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:25:26,298 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:25:26,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 12:25:26,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-12-14 12:25:26,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 12:25:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:26,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:25:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:25:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1021799568, now seen corresponding path program 2 times [2022-12-14 12:25:26,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:25:26,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958035938] [2022-12-14 12:25:26,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:25:26,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:25:26,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:25:26,903 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:25:26,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 12:25:27,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:25:27,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:25:27,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 12:25:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:27,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:25:29,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:25:29,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:25:30,625 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:25:30,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 29 [2022-12-14 12:25:31,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:25:32,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2022-12-14 12:25:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:25:33,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:35,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 12:25:35,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:25:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958035938] [2022-12-14 12:25:35,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958035938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117662300] [2022-12-14 12:25:35,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:25:35,713 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:25:35,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:25:35,714 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:25:35,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 12:25:36,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:25:36,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:25:36,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:25:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:36,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:25:36,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:25:40,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:25:40,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:25:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:41,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-14 12:25:41,340 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:25:41,341 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 19 treesize of output 19 [2022-12-14 12:25:42,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:25:43,765 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 12:25:43,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-12-14 12:25:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:25:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:44,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:44,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 12:25:46,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117662300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:46,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899700031] [2022-12-14 12:25:46,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:25:46,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:25:46,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:25:46,594 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:25:46,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 12:25:47,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:25:47,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:25:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 12:25:47,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:25:47,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:25:47,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:25:48,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:25:48,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:25:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:25:49,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-12-14 12:25:49,401 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:25:49,401 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 19 treesize of output 19 [2022-12-14 12:25:49,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 12:25:50,633 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 12:25:50,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-12-14 12:25:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:25:50,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:25:51,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:25:51,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-12-14 12:25:52,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899700031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:25:52,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:25:52,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 35 [2022-12-14 12:25:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247064522] [2022-12-14 12:25:52,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:25:52,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:25:52,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:25:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:25:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1499, Unknown=18, NotChecked=0, Total=1640 [2022-12-14 12:25:52,975 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 30 states have internal predecessors, (84), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:26:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:26:14,981 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2022-12-14 12:26:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 12:26:14,982 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 30 states have internal predecessors, (84), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2022-12-14 12:26:14,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:26:14,983 INFO L225 Difference]: With dead ends: 135 [2022-12-14 12:26:14,983 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 12:26:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 203 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=593, Invalid=4476, Unknown=43, NotChecked=0, Total=5112 [2022-12-14 12:26:14,984 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 349 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 32 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-14 12:26:14,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 612 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1218 Invalid, 9 Unknown, 0 Unchecked, 10.8s Time] [2022-12-14 12:26:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 12:26:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2022-12-14 12:26:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 82 states have internal predecessors, (89), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:26:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2022-12-14 12:26:14,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 61 [2022-12-14 12:26:14,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:26:14,987 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2022-12-14 12:26:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 30 states have internal predecessors, (84), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 12:26:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2022-12-14 12:26:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:26:14,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:26:14,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:26:14,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 12:26:15,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 12:26:15,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 12:26:15,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:26:15,591 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:26:15,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:26:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash -357187888, now seen corresponding path program 3 times [2022-12-14 12:26:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:26:15,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548556769] [2022-12-14 12:26:15,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:26:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:26:15,596 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:26:15,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 12:26:16,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:26:16,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-14 12:26:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:16,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:26:17,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:26:17,669 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-12-14 12:26:17,669 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 20 treesize of output 26 [2022-12-14 12:26:19,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:26:19,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:26:20,378 INFO L321 Elim1Store]: treesize reduction 102, result has 31.5 percent of original size [2022-12-14 12:26:20,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 67 [2022-12-14 12:26:20,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-12-14 12:26:22,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:26:22,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:26:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,350 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-12-14 12:26:23,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2022-12-14 12:26:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 12:26:23,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:23,633 INFO L321 Elim1Store]: treesize reduction 98, result has 29.0 percent of original size [2022-12-14 12:26:23,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 95 [2022-12-14 12:26:28,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:28,079 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:26:28,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2022-12-14 12:26:30,087 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 12:26:30,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 51 [2022-12-14 12:26:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:26:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:26:36,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:36,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2022-12-14 12:26:36,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:26:36,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2022-12-14 12:26:36,521 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_335 (_ BitVec 32)) (v_arrayElimArr_31 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_32 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#valid| v_~head~0.base_335 (_ bv1 1)))) (or (= (bvadd (select .cse0 (let ((.cse2 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| v_~head~0.base_335 v_arrayElimArr_31))) (select .cse1 (select (select .cse1 c_~head~0.base) .cse2))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_335 v_arrayElimArr_32) c_~head~0.base) .cse2))))) (_ bv1 1)) (_ bv0 1)) (not (= c_~head~0.offset (select v_arrayElimArr_32 (_ bv4 32)))) (not (= (select |c_#valid| v_~head~0.base_335) (_ bv0 1))) (not (= (select v_arrayElimArr_31 (_ bv4 32)) c_~head~0.base)) (not (= (bvadd (select .cse0 c_~head~0.base) (_ bv1 1)) (_ bv0 1)))))) is different from false [2022-12-14 12:26:36,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:26:36,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548556769] [2022-12-14 12:26:36,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548556769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:26:36,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1894829655] [2022-12-14 12:26:36,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:26:36,531 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:26:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:26:36,532 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:26:36,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 12:26:38,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:26:38,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:26:38,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 12:26:38,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:26:38,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:26:39,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:26:40,805 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:26:40,806 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 25 treesize of output 39 [2022-12-14 12:26:41,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:26:43,474 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:26:43,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:26:45,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:45,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 12:26:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:45,229 INFO L321 Elim1Store]: treesize reduction 52, result has 38.1 percent of original size [2022-12-14 12:26:45,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 65 [2022-12-14 12:26:48,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:26:49,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:26:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:50,630 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-12-14 12:26:50,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 61 [2022-12-14 12:26:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:50,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:50,838 INFO L321 Elim1Store]: treesize reduction 64, result has 38.5 percent of original size [2022-12-14 12:26:50,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 95 [2022-12-14 12:26:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:50,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 12:26:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:51,079 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 18 treesize of output 20 [2022-12-14 12:26:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:26:58,308 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:26:58,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 42 [2022-12-14 12:27:01,994 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 12:27:01,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 70 [2022-12-14 12:27:02,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-14 12:27:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:04,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:16,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:16,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 131 [2022-12-14 12:27:16,838 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 126 [2022-12-14 12:27:18,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1894829655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:18,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072979097] [2022-12-14 12:27:18,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:27:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:27:18,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:27:18,150 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:27:18,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 12:27:29,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:27:29,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:27:29,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 12:27:29,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:27:29,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:27:30,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:27:31,000 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:27:31,000 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 25 treesize of output 39 [2022-12-14 12:27:31,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:27:32,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:27:32,703 INFO L321 Elim1Store]: treesize reduction 80, result has 37.0 percent of original size [2022-12-14 12:27:32,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 67 [2022-12-14 12:27:32,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-12-14 12:27:36,683 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:27:36,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:27:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:38,685 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-12-14 12:27:38,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 61 [2022-12-14 12:27:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:38,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 12:27:38,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:38,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:39,009 INFO L321 Elim1Store]: treesize reduction 64, result has 38.5 percent of original size [2022-12-14 12:27:39,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 95 [2022-12-14 12:27:45,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:27:45,151 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:27:45,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2022-12-14 12:27:48,200 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 12:27:48,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 55 [2022-12-14 12:27:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:27:49,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:27:52,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:52,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2022-12-14 12:27:52,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:27:52,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2022-12-14 12:27:52,780 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_347 (_ BitVec 32)) (v_arrayElimArr_41 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_42 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5310 (_ BitVec 1))) (or (not (= c_~head~0.base (select v_arrayElimArr_41 (_ bv4 32)))) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_347))) (= (_ bv0 1) (bvadd (select (store |c_#valid| v_~head~0.base_347 v_ArrVal_5310) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_347 v_arrayElimArr_41))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_347 v_arrayElimArr_42) c_~head~0.base) .cse1))))) (_ bv1 1))) (not (= c_~head~0.offset (select v_arrayElimArr_42 (_ bv4 32)))))) is different from false [2022-12-14 12:27:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072979097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:27:52,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:27:52,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 64 [2022-12-14 12:27:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912930532] [2022-12-14 12:27:52,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:27:52,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 12:27:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:27:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 12:27:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=6802, Unknown=30, NotChecked=338, Total=7656 [2022-12-14 12:27:52,793 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 65 states, 64 states have (on average 2.1875) internal successors, (140), 58 states have internal predecessors, (140), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 12:28:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:28:27,288 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2022-12-14 12:28:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 12:28:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.1875) internal successors, (140), 58 states have internal predecessors, (140), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2022-12-14 12:28:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:28:27,290 INFO L225 Difference]: With dead ends: 146 [2022-12-14 12:28:27,290 INFO L226 Difference]: Without dead ends: 146 [2022-12-14 12:28:27,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 172 SyntacticMatches, 12 SemanticMatches, 109 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4735 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=965, Invalid=10760, Unknown=55, NotChecked=430, Total=12210 [2022-12-14 12:28:27,293 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 498 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 18 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:28:27,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 691 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1694 Invalid, 17 Unknown, 0 Unchecked, 20.0s Time] [2022-12-14 12:28:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-14 12:28:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 94. [2022-12-14 12:28:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 87 states have internal predecessors, (97), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:28:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2022-12-14 12:28:27,295 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 65 [2022-12-14 12:28:27,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:28:27,296 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2022-12-14 12:28:27,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.1875) internal successors, (140), 58 states have internal predecessors, (140), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 12:28:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2022-12-14 12:28:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:28:27,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:28:27,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:28:27,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 12:28:27,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 12:28:27,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 12:28:27,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:28:27,899 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:28:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:28:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -357187887, now seen corresponding path program 3 times [2022-12-14 12:28:27,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:28:27,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909674122] [2022-12-14 12:28:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:28:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:28:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:28:27,903 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:28:27,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 12:28:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:28:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:28:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 12:28:28,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:28:28,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:28:29,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:28:29,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:28:30,650 INFO L321 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-12-14 12:28:30,651 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 18 treesize of output 20 [2022-12-14 12:28:32,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:28:32,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:28:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:28:33,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:28:33,430 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:28:33,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 38 [2022-12-14 12:28:33,602 INFO L321 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-12-14 12:28:33,602 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 41 treesize of output 46 [2022-12-14 12:28:33,688 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:28:33,768 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:28:33,769 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 19 treesize of output 19 [2022-12-14 12:28:35,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:28:35,779 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:28:36,839 INFO L321 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2022-12-14 12:28:36,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2022-12-14 12:28:37,113 INFO L321 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-12-14 12:28:37,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 65 [2022-12-14 12:28:37,422 INFO L321 Elim1Store]: treesize reduction 120, result has 20.0 percent of original size [2022-12-14 12:28:37,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 44 [2022-12-14 12:28:37,476 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:28:37,546 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 30 treesize of output 24 [2022-12-14 12:28:37,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2022-12-14 12:28:37,786 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 128 treesize of output 114 [2022-12-14 12:28:49,681 INFO L321 Elim1Store]: treesize reduction 130, result has 65.0 percent of original size [2022-12-14 12:28:49,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 242 treesize of output 384 [2022-12-14 12:28:49,994 INFO L217 Elim1Store]: Index analysis took 283 ms [2022-12-14 12:28:53,107 INFO L321 Elim1Store]: treesize reduction 126, result has 60.0 percent of original size [2022-12-14 12:28:53,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 344 treesize of output 435 [2022-12-14 12:29:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:29:45,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:51,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:51,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 78 [2022-12-14 12:29:51,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:51,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 66 [2022-12-14 12:29:51,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:51,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 80 [2022-12-14 12:29:51,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:51,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 71 [2022-12-14 12:29:51,800 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd c_~head~0.offset (_ bv4 32)))) (and (forall ((v_~head~0.base_353 (_ BitVec 32)) (v_arrayElimArr_47 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_48 (Array (_ BitVec 32) (_ BitVec 32)))) (or (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.offset| v_~head~0.base_353 v_arrayElimArr_48))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_353 v_arrayElimArr_47) c_~head~0.base) .cse2)) (bvadd (_ bv4 32) (select (select .cse1 c_~head~0.base) .cse2)))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))) (not (= c_~head~0.offset (select v_arrayElimArr_48 (_ bv4 32)))) (not (= c_~head~0.base (select v_arrayElimArr_47 (_ bv4 32)))))) (forall ((v_arrayElimArr_50 (Array (_ BitVec 32) (_ BitVec 32))) (v_~head~0.base_353 (_ BitVec 32)) (v_arrayElimArr_49 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= c_~head~0.offset (select v_arrayElimArr_50 (_ bv4 32)))) (not (= c_~head~0.base (select v_arrayElimArr_49 (_ bv4 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| v_~head~0.base_353 v_arrayElimArr_50)) (.cse6 (store |c_#memory_$Pointer$.base| v_~head~0.base_353 v_arrayElimArr_49))) (let ((.cse4 (select (select .cse6 c_~head~0.base) .cse2)) (.cse5 (bvadd (_ bv4 32) (select (select .cse3 c_~head~0.base) .cse2)))) (bvule (bvadd (_ bv4 32) (select (select .cse3 .cse4) .cse5)) (select (store |c_#length| v_~head~0.base_353 (_ bv8 32)) (select (select .cse6 .cse4) .cse5))))))))) is different from false [2022-12-14 12:29:51,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 12:29:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909674122] [2022-12-14 12:29:51,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909674122] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:51,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070007659] [2022-12-14 12:29:51,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:29:51,816 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 12:29:51,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 12:29:51,817 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 12:29:51,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 12:29:53,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:29:53,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:29:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-14 12:29:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:54,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:29:54,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:29:57,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:29:57,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:29:58,939 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:29:58,940 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 18 treesize of output 30 [2022-12-14 12:29:59,165 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:29:59,165 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 25 treesize of output 39 [2022-12-14 12:30:02,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:30:02,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:30:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:04,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-12-14 12:30:04,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:04,552 INFO L321 Elim1Store]: treesize reduction 52, result has 38.1 percent of original size [2022-12-14 12:30:04,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 65 [2022-12-14 12:30:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:04,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 12:30:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:04,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 12:30:06,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:30:06,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:30:07,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,343 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-12-14 12:30:07,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 84 [2022-12-14 12:30:07,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,516 INFO L321 Elim1Store]: treesize reduction 57, result has 25.0 percent of original size [2022-12-14 12:30:07,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 60 [2022-12-14 12:30:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,710 INFO L321 Elim1Store]: treesize reduction 6, result has 75.0 percent of original size [2022-12-14 12:30:07,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 37 [2022-12-14 12:30:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:07,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-12-14 12:30:19,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:19,489 INFO L321 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2022-12-14 12:30:19,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 235 treesize of output 123 [2022-12-14 12:30:19,633 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-12-14 12:30:19,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 36 [2022-12-14 12:30:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 53 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:30:22,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:38,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:38,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 216 [2022-12-14 12:30:38,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:38,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 213 [2022-12-14 12:30:42,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2070007659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:42,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250208949] [2022-12-14 12:30:42,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:30:42,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:42,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:42,559 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:42,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 12:30:56,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 12:30:56,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:30:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 12:30:56,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:56,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:30:56,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:30:59,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:30:59,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:31:01,132 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:31:01,132 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 18 treesize of output 30 [2022-12-14 12:31:01,316 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 12:31:01,316 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 25 treesize of output 39 [2022-12-14 12:31:04,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:31:04,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:31:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:05,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-12-14 12:31:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:05,746 INFO L321 Elim1Store]: treesize reduction 70, result has 38.6 percent of original size [2022-12-14 12:31:05,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 77 [2022-12-14 12:31:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:05,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:31:05,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 12:31:08,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:31:08,075 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:31:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,620 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-12-14 12:31:08,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 127 [2022-12-14 12:31:08,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,676 INFO L321 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2022-12-14 12:31:08,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 154 [2022-12-14 12:31:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,824 INFO L321 Elim1Store]: treesize reduction 6, result has 83.3 percent of original size [2022-12-14 12:31:08,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 49 [2022-12-14 12:31:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:08,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 54 [2022-12-14 12:31:20,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:21,198 INFO L321 Elim1Store]: treesize reduction 97, result has 16.4 percent of original size [2022-12-14 12:31:21,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 307 treesize of output 150 [2022-12-14 12:31:21,353 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-12-14 12:31:21,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 48 [2022-12-14 12:31:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 51 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:31:22,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:32,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:31:32,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 216 [2022-12-14 12:31:32,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:31:32,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 213 [2022-12-14 12:31:37,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250208949] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:37,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:37,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 61 [2022-12-14 12:31:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814621085] [2022-12-14 12:31:37,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:37,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-14 12:31:37,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 12:31:37,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-14 12:31:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=6555, Unknown=22, NotChecked=164, Total=7140 [2022-12-14 12:31:37,382 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 62 states, 61 states have (on average 2.19672131147541) internal successors, (134), 55 states have internal predecessors, (134), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 12:32:22,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:32:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:38,399 INFO L93 Difference]: Finished difference Result 174 states and 185 transitions. [2022-12-14 12:32:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 12:32:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.19672131147541) internal successors, (134), 55 states have internal predecessors, (134), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 65 [2022-12-14 12:32:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:38,401 INFO L225 Difference]: With dead ends: 174 [2022-12-14 12:32:38,402 INFO L226 Difference]: Without dead ends: 174 [2022-12-14 12:32:38,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 170 SyntacticMatches, 17 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4944 ImplicationChecksByTransitivity, 101.3s TimeCoverageRelationStatistics Valid=1024, Invalid=11362, Unknown=50, NotChecked=220, Total=12656 [2022-12-14 12:32:38,404 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 958 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 48 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:38,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 757 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1770 Invalid, 15 Unknown, 0 Unchecked, 27.3s Time] [2022-12-14 12:32:38,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-12-14 12:32:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 97. [2022-12-14 12:32:38,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 90 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 12:32:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-12-14 12:32:38,407 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 65 [2022-12-14 12:32:38,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:38,407 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-12-14 12:32:38,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.19672131147541) internal successors, (134), 55 states have internal predecessors, (134), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-12-14 12:32:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-12-14 12:32:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 12:32:38,408 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:38,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:38,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 12:32:38,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 12:32:38,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 12:32:39,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 12:32:39,011 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-12-14 12:32:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash 243815640, now seen corresponding path program 2 times [2022-12-14 12:32:39,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 12:32:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665340643] [2022-12-14 12:32:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 12:32:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 12:32:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 12:32:39,015 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 12:32:39,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9f675a7-f614-47ef-93e5-55894d291eb7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 12:32:39,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 12:32:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:32:39,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 12:32:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:39,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 12:32:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:39,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2022-12-14 12:32:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:40,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:40,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 60 [2022-12-14 12:32:41,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:32:41,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:32:42,683 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-12-14 12:32:42,683 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 19 treesize of output 19 [2022-12-14 12:32:42,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2022-12-14 12:32:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:44,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:44,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:44,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-12-14 12:32:45,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:32:45,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:45,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:45,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 56 [2022-12-14 12:32:45,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-12-14 12:32:46,363 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 12:32:46,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2022-12-14 12:32:46,507 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-14 12:32:46,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 82 [2022-12-14 12:32:46,649 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:32:46,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2022-12-14 12:32:46,751 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 40 treesize of output 30 [2022-12-14 12:32:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:47,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:47,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 13 [2022-12-14 12:32:47,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 155 [2022-12-14 12:32:58,277 INFO L321 Elim1Store]: treesize reduction 36, result has 74.5 percent of original size [2022-12-14 12:32:58,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 359 treesize of output 359 [2022-12-14 12:32:58,533 INFO L217 Elim1Store]: Index analysis took 224 ms [2022-12-14 12:33:00,084 INFO L321 Elim1Store]: treesize reduction 36, result has 74.5 percent of original size [2022-12-14 12:33:00,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 305 [2022-12-14 12:37:47,363 INFO L321 Elim1Store]: treesize reduction 332, result has 11.9 percent of original size [2022-12-14 12:37:47,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 131 treesize of output 99 [2022-12-14 12:37:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:37:49,026 INFO L328 TraceCheckSpWp]: Computing backward predicates...