./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- 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-5e519f3 [2022-11-03 02:02:21,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:02:21,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:02:21,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:02:21,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:02:21,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:02:21,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:02:21,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:02:21,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:02:21,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:02:21,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:02:21,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:02:21,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:02:21,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:02:21,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:02:21,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:02:21,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:02:21,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:02:21,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:02:21,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:02:21,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:02:21,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:02:21,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:02:21,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:02:21,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:02:21,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:02:21,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:02:21,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:02:21,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:02:21,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:02:21,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:02:21,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:02:21,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:02:21,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:02:21,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:02:21,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:02:21,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:02:21,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:02:21,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:02:21,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:02:21,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:02:21,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:02:21,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:02:21,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:02:21,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:02:21,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:02:21,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:02:21,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:02:21,562 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:02:21,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:02:21,563 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:02:21,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:02:21,567 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:02:21,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:02:21,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:02:21,568 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:02:21,568 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:02:21,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:02:21,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:02:21,569 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:02:21,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:02:21,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:02:21,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:02:21,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:02:21,570 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:02:21,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:02:21,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:02:21,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:02:21,571 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:02:21,572 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:02:21,572 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:02:21,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:02:21,572 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:02:21,573 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:02:21,573 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:02:21,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:02:21,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:02:21,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:21,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:02:21,574 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:02:21,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:02:21,574 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:02:21,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:02:21,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:02:21,575 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2022-11-03 02:02:21,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:02:21,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:02:21,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:02:21,940 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:02:21,941 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:02:21,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2022-11-03 02:02:22,032 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/49429de79/db5c076113464e5eae9766b46430b12b/FLAG204213a48 [2022-11-03 02:02:22,703 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:02:22,704 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2022-11-03 02:02:22,735 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/49429de79/db5c076113464e5eae9766b46430b12b/FLAG204213a48 [2022-11-03 02:02:22,878 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/49429de79/db5c076113464e5eae9766b46430b12b [2022-11-03 02:02:22,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:02:22,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:02:22,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:22,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:02:22,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:02:22,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd9a0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22, skipping insertion in model container [2022-11-03 02:02:22,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:02:22,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:23,478 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2022-11-03 02:02:23,638 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2022-11-03 02:02:23,639 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2022-11-03 02:02:23,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:23,666 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-03 02:02:23,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@534fb2c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:23, skipping insertion in model container [2022-11-03 02:02:23,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:23,668 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-03 02:02:23,670 INFO L158 Benchmark]: Toolchain (without parser) took 782.49ms. Allocated memory is still 125.8MB. Free memory was 86.1MB in the beginning and 91.8MB in the end (delta: -5.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:02:23,671 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:02:23,672 INFO L158 Benchmark]: CACSL2BoogieTranslator took 778.95ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 91.8MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:02:23,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 125.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 778.95ms. Allocated memory is still 125.8MB. Free memory was 85.9MB in the beginning and 91.8MB in the end (delta: -6.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f --- 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-5e519f3 [2022-11-03 02:02:26,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:02:26,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:02:26,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:02:26,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:02:26,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:02:26,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:02:26,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:02:26,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:02:26,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:02:26,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:02:26,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:02:26,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:02:26,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:02:26,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:02:26,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:02:26,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:02:26,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:02:26,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:02:26,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:02:26,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:02:26,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:02:26,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:02:26,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:02:26,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:02:26,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:02:26,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:02:26,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:02:26,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:02:26,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:02:26,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:02:26,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:02:26,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:02:26,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:02:26,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:02:26,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:02:26,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:02:26,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:02:26,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:02:26,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:02:26,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:02:26,130 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-03 02:02:26,172 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:02:26,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:02:26,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:02:26,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:02:26,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:02:26,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:02:26,180 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:02:26,183 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:02:26,184 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:02:26,184 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:02:26,184 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:02:26,184 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:02:26,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:02:26,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:02:26,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:02:26,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:02:26,186 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:02:26,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:02:26,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:02:26,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:02:26,189 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:02:26,189 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:02:26,189 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:02:26,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:02:26,190 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:02:26,190 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:02:26,190 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:02:26,190 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:02:26,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:02:26,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:02:26,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:02:26,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:02:26,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:26,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:02:26,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:02:26,193 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:02:26,193 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:26,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:02:26,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:02:26,194 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32a24617e0b83f023304780397185eef703cdbd26842fbad821fea93a0f1f12f [2022-11-03 02:02:26,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:02:26,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:02:26,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:02:26,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:02:26,718 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:02:26,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2022-11-03 02:02:26,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/443241caa/0c0802d0ba924280bbe241695f534464/FLAG4a08aa2ba [2022-11-03 02:02:27,562 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:02:27,562 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i [2022-11-03 02:02:27,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/443241caa/0c0802d0ba924280bbe241695f534464/FLAG4a08aa2ba [2022-11-03 02:02:27,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/data/443241caa/0c0802d0ba924280bbe241695f534464 [2022-11-03 02:02:27,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:02:27,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:02:27,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:27,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:02:27,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:02:27,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:27" (1/1) ... [2022-11-03 02:02:27,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577e7e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:27, skipping insertion in model container [2022-11-03 02:02:27,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:27" (1/1) ... [2022-11-03 02:02:27,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:02:27,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:28,478 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2022-11-03 02:02:28,656 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2022-11-03 02:02:28,665 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2022-11-03 02:02:28,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:28,714 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:02:28,739 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:28,759 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2022-11-03 02:02:28,819 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2022-11-03 02:02:28,820 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2022-11-03 02:02:28,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:28,837 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:02:28,880 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[33021,33034] [2022-11-03 02:02:28,989 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44124,44137] [2022-11-03 02:02:28,991 WARN L230 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_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test7-2.i[44245,44258] [2022-11-03 02:02:29,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:29,060 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:02:29,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29 WrapperNode [2022-11-03 02:02:29,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:29,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:29,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:02:29,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:02:29,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,227 INFO L138 Inliner]: procedures = 179, calls = 328, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1175 [2022-11-03 02:02:29,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:29,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:02:29,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:02:29,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:02:29,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,367 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:02:29,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:02:29,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:02:29,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:02:29,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:29,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:02:29,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:02:29,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-03 02:02:29,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:02:29,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 02:02:29,493 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:02:29,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:02:29,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:02:29,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:02:29,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:02:29,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:02:29,871 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:02:29,873 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:02:29,878 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 02:02:36,374 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:02:36,393 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:02:36,393 INFO L300 CfgBuilder]: Removed 72 assume(true) statements. [2022-11-03 02:02:36,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:36 BoogieIcfgContainer [2022-11-03 02:02:36,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:02:36,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:02:36,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:02:36,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:02:36,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:02:27" (1/3) ... [2022-11-03 02:02:36,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2617eefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:36, skipping insertion in model container [2022-11-03 02:02:36,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29" (2/3) ... [2022-11-03 02:02:36,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2617eefb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:36, skipping insertion in model container [2022-11-03 02:02:36,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:36" (3/3) ... [2022-11-03 02:02:36,412 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test7-2.i [2022-11-03 02:02:36,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:02:36,435 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 635 error locations. [2022-11-03 02:02:36,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:02:36,548 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;@693b9929, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:02:36,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 635 error locations. [2022-11-03 02:02:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 1249 states, 612 states have (on average 2.2663398692810457) internal successors, (1387), 1244 states have internal predecessors, (1387), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:02:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:02:36,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:36,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:02:36,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:02:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2022-11-03 02:02:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209199083] [2022-11-03 02:02:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:36,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:36,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:36,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:02:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:36,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:02:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:36,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:36,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209199083] [2022-11-03 02:02:36,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209199083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:36,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:36,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:02:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920419023] [2022-11-03 02:02:36,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:36,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:36,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:36,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:36,933 INFO L87 Difference]: Start difference. First operand has 1249 states, 612 states have (on average 2.2663398692810457) internal successors, (1387), 1244 states have internal predecessors, (1387), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:40,108 INFO L93 Difference]: Finished difference Result 1417 states and 1492 transitions. [2022-11-03 02:02:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 02:02:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:40,131 INFO L225 Difference]: With dead ends: 1417 [2022-11-03 02:02:40,132 INFO L226 Difference]: Without dead ends: 1415 [2022-11-03 02:02:40,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:40,137 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 1160 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:40,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 893 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:02:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-03 02:02:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1230. [2022-11-03 02:02:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 610 states have (on average 2.1163934426229507) internal successors, (1291), 1225 states have internal predecessors, (1291), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:02:40,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1297 transitions. [2022-11-03 02:02:40,282 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1297 transitions. Word has length 3 [2022-11-03 02:02:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:40,283 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1297 transitions. [2022-11-03 02:02:40,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1297 transitions. [2022-11-03 02:02:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-03 02:02:40,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:40,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-03 02:02:40,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:40,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:40,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:02:40,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:40,498 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2022-11-03 02:02:40,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:40,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433282911] [2022-11-03 02:02:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:40,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:40,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:40,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:40,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:02:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:40,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:40,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:40,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:02:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:40,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:40,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:40,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433282911] [2022-11-03 02:02:40,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433282911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:40,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:40,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:02:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710685181] [2022-11-03 02:02:40,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:40,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:40,693 INFO L87 Difference]: Start difference. First operand 1230 states and 1297 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:45,506 INFO L93 Difference]: Finished difference Result 1819 states and 1926 transitions. [2022-11-03 02:02:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-03 02:02:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:45,519 INFO L225 Difference]: With dead ends: 1819 [2022-11-03 02:02:45,519 INFO L226 Difference]: Without dead ends: 1819 [2022-11-03 02:02:45,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:45,524 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 629 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:45,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 1690 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 02:02:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2022-11-03 02:02:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1431. [2022-11-03 02:02:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 812 states have (on average 2.0985221674876846) internal successors, (1704), 1426 states have internal predecessors, (1704), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:02:45,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 1710 transitions. [2022-11-03 02:02:45,586 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 1710 transitions. Word has length 3 [2022-11-03 02:02:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:45,587 INFO L495 AbstractCegarLoop]: Abstraction has 1431 states and 1710 transitions. [2022-11-03 02:02:45,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 1710 transitions. [2022-11-03 02:02:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 02:02:45,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:45,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:45,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:45,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:02:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2022-11-03 02:02:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:45,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661269057] [2022-11-03 02:02:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:45,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:45,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:45,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:02:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:02:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:46,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:02:46,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:02:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:46,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:02:46,127 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:02:46,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:02:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:46,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:46,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661269057] [2022-11-03 02:02:46,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661269057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:46,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:46,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:02:46,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915381026] [2022-11-03 02:02:46,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:46,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:46,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:46,157 INFO L87 Difference]: Start difference. First operand 1431 states and 1710 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:50,902 INFO L93 Difference]: Finished difference Result 1609 states and 1899 transitions. [2022-11-03 02:02:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-03 02:02:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:50,909 INFO L225 Difference]: With dead ends: 1609 [2022-11-03 02:02:50,910 INFO L226 Difference]: Without dead ends: 1609 [2022-11-03 02:02:50,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:50,911 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 1450 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1453 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:50,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1453 Valid, 507 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 02:02:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-03 02:02:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1219. [2022-11-03 02:02:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 610 states have (on average 2.09672131147541) internal successors, (1279), 1214 states have internal predecessors, (1279), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:02:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1285 transitions. [2022-11-03 02:02:50,941 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1285 transitions. Word has length 7 [2022-11-03 02:02:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:50,942 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1285 transitions. [2022-11-03 02:02:50,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1285 transitions. [2022-11-03 02:02:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:02:50,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:50,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:50,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:51,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:51,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:02:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2022-11-03 02:02:51,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913788621] [2022-11-03 02:02:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:51,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:51,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:51,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:51,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:02:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:51,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:51,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:02:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:51,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:51,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913788621] [2022-11-03 02:02:51,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913788621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:51,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:51,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:02:51,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038473308] [2022-11-03 02:02:51,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:51,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:51,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:51,353 INFO L87 Difference]: Start difference. First operand 1219 states and 1285 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:54,394 INFO L93 Difference]: Finished difference Result 1548 states and 1643 transitions. [2022-11-03 02:02:54,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:54,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:02:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:54,402 INFO L225 Difference]: With dead ends: 1548 [2022-11-03 02:02:54,402 INFO L226 Difference]: Without dead ends: 1548 [2022-11-03 02:02:54,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:54,403 INFO L413 NwaCegarLoop]: 1133 mSDtfsCounter, 973 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:54,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1476 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-03 02:02:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2022-11-03 02:02:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1172. [2022-11-03 02:02:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 610 states have (on average 2.019672131147541) internal successors, (1232), 1167 states have internal predecessors, (1232), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:02:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1238 transitions. [2022-11-03 02:02:54,432 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1238 transitions. Word has length 8 [2022-11-03 02:02:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:54,432 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 1238 transitions. [2022-11-03 02:02:54,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1238 transitions. [2022-11-03 02:02:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:02:54,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:54,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:54,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:54,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:54,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:02:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2022-11-03 02:02:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:54,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136800213] [2022-11-03 02:02:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:54,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:54,647 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:54,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:02:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:54,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:02:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:54,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:54,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136800213] [2022-11-03 02:02:54,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136800213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:54,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:54,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:02:54,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560287238] [2022-11-03 02:02:54,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:54,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:02:54,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:02:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:54,846 INFO L87 Difference]: Start difference. First operand 1172 states and 1238 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:58,683 INFO L93 Difference]: Finished difference Result 1627 states and 1725 transitions. [2022-11-03 02:02:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:02:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:02:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:58,690 INFO L225 Difference]: With dead ends: 1627 [2022-11-03 02:02:58,691 INFO L226 Difference]: Without dead ends: 1627 [2022-11-03 02:02:58,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:02:58,692 INFO L413 NwaCegarLoop]: 1339 mSDtfsCounter, 674 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:58,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 1855 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:02:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2022-11-03 02:02:58,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1194. [2022-11-03 02:02:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 642 states have (on average 2.0062305295950154) internal successors, (1288), 1189 states have internal predecessors, (1288), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:02:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1294 transitions. [2022-11-03 02:02:58,720 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1294 transitions. Word has length 8 [2022-11-03 02:02:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:58,721 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1294 transitions. [2022-11-03 02:02:58,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1294 transitions. [2022-11-03 02:02:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 02:02:58,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:58,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:58,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:58,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:58,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:02:58,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash 871378613, now seen corresponding path program 1 times [2022-11-03 02:02:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:58,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980561459] [2022-11-03 02:02:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:58,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:58,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:02:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:02:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:59,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:59,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980561459] [2022-11-03 02:02:59,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980561459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:59,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:59,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:59,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2582983] [2022-11-03 02:02:59,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:59,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:59,230 INFO L87 Difference]: Start difference. First operand 1194 states and 1294 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:00,348 INFO L93 Difference]: Finished difference Result 1841 states and 1984 transitions. [2022-11-03 02:03:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:03:00,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 02:03:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:00,355 INFO L225 Difference]: With dead ends: 1841 [2022-11-03 02:03:00,355 INFO L226 Difference]: Without dead ends: 1841 [2022-11-03 02:03:00,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:00,357 INFO L413 NwaCegarLoop]: 1358 mSDtfsCounter, 754 mSDsluCounter, 2287 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 3645 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:00,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 3645 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:03:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2022-11-03 02:03:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1439. [2022-11-03 02:03:00,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 887 states have (on average 1.9706877113866967) internal successors, (1748), 1434 states have internal predecessors, (1748), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1754 transitions. [2022-11-03 02:03:00,391 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1754 transitions. Word has length 11 [2022-11-03 02:03:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:00,392 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1754 transitions. [2022-11-03 02:03:00,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1754 transitions. [2022-11-03 02:03:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:03:00,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:00,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:00,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:00,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:00,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2022-11-03 02:03:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909011925] [2022-11-03 02:03:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:00,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:00,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:00,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:00,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:03:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:00,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:03:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:00,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:00,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:00,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:00,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909011925] [2022-11-03 02:03:00,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909011925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:00,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:00,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:03:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569103926] [2022-11-03 02:03:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:00,795 INFO L87 Difference]: Start difference. First operand 1439 states and 1754 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:00,830 INFO L93 Difference]: Finished difference Result 1601 states and 1902 transitions. [2022-11-03 02:03:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:03:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:00,836 INFO L225 Difference]: With dead ends: 1601 [2022-11-03 02:03:00,837 INFO L226 Difference]: Without dead ends: 1601 [2022-11-03 02:03:00,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:00,838 INFO L413 NwaCegarLoop]: 1182 mSDtfsCounter, 583 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:00,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 1998 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-11-03 02:03:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1379. [2022-11-03 02:03:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 851 states have (on average 1.9529964747356052) internal successors, (1662), 1374 states have internal predecessors, (1662), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1668 transitions. [2022-11-03 02:03:00,866 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1668 transitions. Word has length 13 [2022-11-03 02:03:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:00,867 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1668 transitions. [2022-11-03 02:03:00,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1668 transitions. [2022-11-03 02:03:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:03:00,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:00,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:00,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-03 02:03:01,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:01,080 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr364REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash -459414345, now seen corresponding path program 1 times [2022-11-03 02:03:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:01,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969767612] [2022-11-03 02:03:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:01,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:01,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:01,083 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:01,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:03:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:01,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:01,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:01,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:01,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969767612] [2022-11-03 02:03:01,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969767612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:01,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:01,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075290460] [2022-11-03 02:03:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:01,298 INFO L87 Difference]: Start difference. First operand 1379 states and 1668 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:01,395 INFO L93 Difference]: Finished difference Result 1573 states and 1846 transitions. [2022-11-03 02:03:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:03:01,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 02:03:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:01,400 INFO L225 Difference]: With dead ends: 1573 [2022-11-03 02:03:01,400 INFO L226 Difference]: Without dead ends: 1573 [2022-11-03 02:03:01,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:01,401 INFO L413 NwaCegarLoop]: 1137 mSDtfsCounter, 554 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:01,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 3083 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-03 02:03:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1349. [2022-11-03 02:03:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 835 states have (on average 1.9209580838323352) internal successors, (1604), 1344 states have internal predecessors, (1604), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1610 transitions. [2022-11-03 02:03:01,430 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1610 transitions. Word has length 15 [2022-11-03 02:03:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:01,431 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 1610 transitions. [2022-11-03 02:03:01,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1610 transitions. [2022-11-03 02:03:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:03:01,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:01,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:01,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:01,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:01,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr634ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:01,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2058395604, now seen corresponding path program 1 times [2022-11-03 02:03:01,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196831875] [2022-11-03 02:03:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:01,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:01,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:01,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:03:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:01,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:03:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:01,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:01,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:01,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 38 [2022-11-03 02:03:01,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:03:01,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 22 [2022-11-03 02:03:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:02,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:02,012 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196831875] [2022-11-03 02:03:02,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196831875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:02,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:02,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:02,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270636442] [2022-11-03 02:03:02,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:02,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:02,015 INFO L87 Difference]: Start difference. First operand 1349 states and 1610 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:03,741 INFO L93 Difference]: Finished difference Result 1785 states and 2105 transitions. [2022-11-03 02:03:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:03:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 02:03:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:03,746 INFO L225 Difference]: With dead ends: 1785 [2022-11-03 02:03:03,746 INFO L226 Difference]: Without dead ends: 1785 [2022-11-03 02:03:03,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:03,747 INFO L413 NwaCegarLoop]: 1108 mSDtfsCounter, 422 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 3244 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:03,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 3244 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 39 Unchecked, 1.7s Time] [2022-11-03 02:03:03,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-11-03 02:03:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1348. [2022-11-03 02:03:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 834 states have (on average 1.920863309352518) internal successors, (1602), 1343 states have internal predecessors, (1602), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1608 transitions. [2022-11-03 02:03:03,780 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1608 transitions. Word has length 16 [2022-11-03 02:03:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:03,780 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1608 transitions. [2022-11-03 02:03:03,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1608 transitions. [2022-11-03 02:03:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:03:03,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:03,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:03,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:03,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:03,996 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:03,997 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2022-11-03 02:03:03,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:03,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205554756] [2022-11-03 02:03:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:03,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:04,000 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:03:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:03:04,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:04,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:04,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205554756] [2022-11-03 02:03:04,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205554756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:04,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:04,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:03:04,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136377664] [2022-11-03 02:03:04,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:03:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:03:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:04,264 INFO L87 Difference]: Start difference. First operand 1348 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:04,300 INFO L93 Difference]: Finished difference Result 1288 states and 1522 transitions. [2022-11-03 02:03:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:03:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 02:03:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:04,306 INFO L225 Difference]: With dead ends: 1288 [2022-11-03 02:03:04,306 INFO L226 Difference]: Without dead ends: 1288 [2022-11-03 02:03:04,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:03:04,307 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 1087 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:04,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 1125 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-11-03 02:03:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1288. [2022-11-03 02:03:04,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 798 states have (on average 1.899749373433584) internal successors, (1516), 1283 states have internal predecessors, (1516), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1522 transitions. [2022-11-03 02:03:04,334 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1522 transitions. Word has length 18 [2022-11-03 02:03:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:04,334 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 1522 transitions. [2022-11-03 02:03:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1522 transitions. [2022-11-03 02:03:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:03:04,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:04,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:04,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:04,551 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:04,551 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2022-11-03 02:03:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:04,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737727269] [2022-11-03 02:03:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:04,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:04,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:04,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:04,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:03:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:04,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:04,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:04,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:04,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737727269] [2022-11-03 02:03:04,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737727269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:04,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:04,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492936171] [2022-11-03 02:03:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:04,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:04,842 INFO L87 Difference]: Start difference. First operand 1288 states and 1522 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:04,953 INFO L93 Difference]: Finished difference Result 1260 states and 1466 transitions. [2022-11-03 02:03:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:03:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 02:03:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:04,958 INFO L225 Difference]: With dead ends: 1260 [2022-11-03 02:03:04,959 INFO L226 Difference]: Without dead ends: 1260 [2022-11-03 02:03:04,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:04,960 INFO L413 NwaCegarLoop]: 1058 mSDtfsCounter, 1058 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:04,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 2131 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-11-03 02:03:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1258. [2022-11-03 02:03:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 782 states have (on average 1.8644501278772379) internal successors, (1458), 1253 states have internal predecessors, (1458), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1464 transitions. [2022-11-03 02:03:04,984 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1464 transitions. Word has length 20 [2022-11-03 02:03:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:04,985 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1464 transitions. [2022-11-03 02:03:04,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1464 transitions. [2022-11-03 02:03:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:03:04,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:04,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:05,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:05,207 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:05,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2022-11-03 02:03:05,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:05,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606281141] [2022-11-03 02:03:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:05,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:05,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:05,210 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:05,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:03:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:05,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:05,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:03:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:05,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:05,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:05,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606281141] [2022-11-03 02:03:05,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606281141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:05,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:05,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:03:05,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454942314] [2022-11-03 02:03:05,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:05,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:05,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:05,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:05,568 INFO L87 Difference]: Start difference. First operand 1258 states and 1464 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:09,095 INFO L93 Difference]: Finished difference Result 1838 states and 2167 transitions. [2022-11-03 02:03:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:03:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:03:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:09,101 INFO L225 Difference]: With dead ends: 1838 [2022-11-03 02:03:09,101 INFO L226 Difference]: Without dead ends: 1838 [2022-11-03 02:03:09,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:09,102 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 1714 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:09,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 1217 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:03:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-11-03 02:03:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1254. [2022-11-03 02:03:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 782 states have (on average 1.854219948849105) internal successors, (1450), 1249 states have internal predecessors, (1450), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1456 transitions. [2022-11-03 02:03:09,129 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1456 transitions. Word has length 34 [2022-11-03 02:03:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:09,129 INFO L495 AbstractCegarLoop]: Abstraction has 1254 states and 1456 transitions. [2022-11-03 02:03:09,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1456 transitions. [2022-11-03 02:03:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:03:09,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:09,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:09,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 02:03:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:09,348 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:09,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2022-11-03 02:03:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:09,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59780393] [2022-11-03 02:03:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:09,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:09,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:09,350 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:09,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:03:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:09,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:03:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:09,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:03:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:09,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:09,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:09,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59780393] [2022-11-03 02:03:09,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59780393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:09,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:09,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:03:09,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625604456] [2022-11-03 02:03:09,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:09,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:09,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:09,855 INFO L87 Difference]: Start difference. First operand 1254 states and 1456 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:15,163 INFO L93 Difference]: Finished difference Result 1968 states and 2276 transitions. [2022-11-03 02:03:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:03:15,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 02:03:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:15,170 INFO L225 Difference]: With dead ends: 1968 [2022-11-03 02:03:15,170 INFO L226 Difference]: Without dead ends: 1968 [2022-11-03 02:03:15,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:15,172 INFO L413 NwaCegarLoop]: 1381 mSDtfsCounter, 1212 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:15,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2459 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-03 02:03:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-11-03 02:03:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1250. [2022-11-03 02:03:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 782 states have (on average 1.843989769820972) internal successors, (1442), 1245 states have internal predecessors, (1442), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1448 transitions. [2022-11-03 02:03:15,197 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1448 transitions. Word has length 34 [2022-11-03 02:03:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:15,197 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 1448 transitions. [2022-11-03 02:03:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1448 transitions. [2022-11-03 02:03:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:03:15,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:15,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:15,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:15,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:15,417 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2022-11-03 02:03:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:15,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513233704] [2022-11-03 02:03:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:15,419 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:15,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:03:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:15,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:15,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:15,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:15,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513233704] [2022-11-03 02:03:15,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513233704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:15,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:15,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:15,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329120412] [2022-11-03 02:03:15,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:15,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:15,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:15,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:15,785 INFO L87 Difference]: Start difference. First operand 1250 states and 1448 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:15,859 INFO L93 Difference]: Finished difference Result 1238 states and 1428 transitions. [2022-11-03 02:03:15,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:03:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:03:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:15,866 INFO L225 Difference]: With dead ends: 1238 [2022-11-03 02:03:15,866 INFO L226 Difference]: Without dead ends: 1238 [2022-11-03 02:03:15,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:15,867 INFO L413 NwaCegarLoop]: 1052 mSDtfsCounter, 1034 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 2109 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:15,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 2109 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-11-03 02:03:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1238. [2022-11-03 02:03:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 770 states have (on average 1.8467532467532468) internal successors, (1422), 1233 states have internal predecessors, (1422), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1428 transitions. [2022-11-03 02:03:15,888 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1428 transitions. Word has length 52 [2022-11-03 02:03:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:15,888 INFO L495 AbstractCegarLoop]: Abstraction has 1238 states and 1428 transitions. [2022-11-03 02:03:15,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1428 transitions. [2022-11-03 02:03:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:03:15,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:15,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:15,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 02:03:16,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:16,106 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2022-11-03 02:03:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:16,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978796853] [2022-11-03 02:03:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:16,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:16,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:16,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:16,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:03:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:03:16,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:16,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:03:16,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:03:17,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:17,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:03:17,320 INFO L356 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-03 02:03:17,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-03 02:03:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:17,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:17,341 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978796853] [2022-11-03 02:03:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978796853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:17,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:03:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864388391] [2022-11-03 02:03:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:17,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:17,343 INFO L87 Difference]: Start difference. First operand 1238 states and 1428 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:21,173 INFO L93 Difference]: Finished difference Result 1586 states and 1893 transitions. [2022-11-03 02:03:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:03:21,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-03 02:03:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:21,180 INFO L225 Difference]: With dead ends: 1586 [2022-11-03 02:03:21,180 INFO L226 Difference]: Without dead ends: 1586 [2022-11-03 02:03:21,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:21,181 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1107 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:21,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 789 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:03:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-11-03 02:03:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1168. [2022-11-03 02:03:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 738 states have (on average 1.7859078590785908) internal successors, (1318), 1163 states have internal predecessors, (1318), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1324 transitions. [2022-11-03 02:03:21,203 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1324 transitions. Word has length 60 [2022-11-03 02:03:21,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:21,203 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1324 transitions. [2022-11-03 02:03:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:21,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1324 transitions. [2022-11-03 02:03:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:03:21,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:21,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:21,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:21,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:21,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2022-11-03 02:03:21,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:21,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332119956] [2022-11-03 02:03:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:21,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:21,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:21,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:21,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:03:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:03:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:21,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-03 02:03:21,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:03:21,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:03:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:21,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:21,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:21,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332119956] [2022-11-03 02:03:21,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332119956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:21,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:21,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:21,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410749724] [2022-11-03 02:03:21,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:21,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:21,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:21,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:21,876 INFO L87 Difference]: Start difference. First operand 1168 states and 1324 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:25,433 INFO L93 Difference]: Finished difference Result 1167 states and 1323 transitions. [2022-11-03 02:03:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:03:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-03 02:03:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:25,437 INFO L225 Difference]: With dead ends: 1167 [2022-11-03 02:03:25,438 INFO L226 Difference]: Without dead ends: 1167 [2022-11-03 02:03:25,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:03:25,439 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 4 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:25,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2564 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 02:03:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-11-03 02:03:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1167. [2022-11-03 02:03:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 738 states have (on average 1.7845528455284554) internal successors, (1317), 1162 states have internal predecessors, (1317), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1323 transitions. [2022-11-03 02:03:25,459 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1323 transitions. Word has length 65 [2022-11-03 02:03:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:25,459 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1323 transitions. [2022-11-03 02:03:25,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1323 transitions. [2022-11-03 02:03:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:03:25,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:25,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:25,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:25,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:25,676 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2022-11-03 02:03:25,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:25,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044559582] [2022-11-03 02:03:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:25,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:25,679 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:03:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:26,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:03:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:26,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:03:26,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:03:26,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:03:26,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-03 02:03:26,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-03 02:03:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:26,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:26,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044559582] [2022-11-03 02:03:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044559582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:26,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:26,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169362981] [2022-11-03 02:03:26,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:26,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:03:26,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:03:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:26,227 INFO L87 Difference]: Start difference. First operand 1167 states and 1323 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:30,836 INFO L93 Difference]: Finished difference Result 1166 states and 1322 transitions. [2022-11-03 02:03:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:03:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-03 02:03:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:30,840 INFO L225 Difference]: With dead ends: 1166 [2022-11-03 02:03:30,840 INFO L226 Difference]: Without dead ends: 1166 [2022-11-03 02:03:30,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:03:30,841 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 2 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:30,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2621 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-03 02:03:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-11-03 02:03:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1166. [2022-11-03 02:03:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 737 states have (on average 1.78561736770692) internal successors, (1316), 1161 states have internal predecessors, (1316), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:03:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1322 transitions. [2022-11-03 02:03:30,859 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1322 transitions. Word has length 65 [2022-11-03 02:03:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:30,860 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1322 transitions. [2022-11-03 02:03:30,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1322 transitions. [2022-11-03 02:03:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:03:30,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:30,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:30,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:31,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:31,076 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1088613615, now seen corresponding path program 1 times [2022-11-03 02:03:31,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:31,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236977467] [2022-11-03 02:03:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:31,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:31,078 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:31,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:03:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:03:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:31,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:03:31,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:31,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236977467] [2022-11-03 02:03:31,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236977467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:03:31,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:03:31,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:03:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770058462] [2022-11-03 02:03:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:03:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:03:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:03:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:03:31,487 INFO L87 Difference]: Start difference. First operand 1166 states and 1322 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:03:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:31,546 INFO L93 Difference]: Finished difference Result 1169 states and 1326 transitions. [2022-11-03 02:03:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:03:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-11-03 02:03:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:31,552 INFO L225 Difference]: With dead ends: 1169 [2022-11-03 02:03:31,553 INFO L226 Difference]: Without dead ends: 1169 [2022-11-03 02:03:31,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:03:31,554 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 2 mSDsluCounter, 2019 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3031 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:31,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3031 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:03:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-11-03 02:03:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1169. [2022-11-03 02:03:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 739 states have (on average 1.7848443843031123) internal successors, (1319), 1164 states have internal predecessors, (1319), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:03:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1326 transitions. [2022-11-03 02:03:31,604 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1326 transitions. Word has length 73 [2022-11-03 02:03:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:31,604 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1326 transitions. [2022-11-03 02:03:31,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:03:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1326 transitions. [2022-11-03 02:03:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:03:31,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:31,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:31,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:31,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:03:31,821 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 145492468, now seen corresponding path program 1 times [2022-11-03 02:03:31,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:31,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87796589] [2022-11-03 02:03:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:31,824 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:31,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:03:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:32,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:32,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87796589] [2022-11-03 02:03:32,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87796589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636971746] [2022-11-03 02:03:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:32,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:32,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:32,359 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:32,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 02:03:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:32,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:33,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636971746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519364397] [2022-11-03 02:03:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:33,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:33,019 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:33,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:03:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:03:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:33,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519364397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:33,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:33,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-03 02:03:33,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356647908] [2022-11-03 02:03:33,436 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:33,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:03:33,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:03:33,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:03:33,438 INFO L87 Difference]: Start difference. First operand 1169 states and 1326 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:03:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:33,692 INFO L93 Difference]: Finished difference Result 1181 states and 1343 transitions. [2022-11-03 02:03:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:03:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2022-11-03 02:03:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:33,698 INFO L225 Difference]: With dead ends: 1181 [2022-11-03 02:03:33,698 INFO L226 Difference]: Without dead ends: 1181 [2022-11-03 02:03:33,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:03:33,699 INFO L413 NwaCegarLoop]: 1013 mSDtfsCounter, 14 mSDsluCounter, 5041 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6054 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:33,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6054 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:03:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-11-03 02:03:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1179. [2022-11-03 02:03:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 748 states have (on average 1.7834224598930482) internal successors, (1334), 1173 states have internal predecessors, (1334), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:03:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1341 transitions. [2022-11-03 02:03:33,722 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1341 transitions. Word has length 74 [2022-11-03 02:03:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:33,723 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1341 transitions. [2022-11-03 02:03:33,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:03:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1341 transitions. [2022-11-03 02:03:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:03:33,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:33,724 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:33,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:33,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:34,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-03 02:03:34,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:34,330 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:03:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2026145327, now seen corresponding path program 2 times [2022-11-03 02:03:34,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:03:34,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709739076] [2022-11-03 02:03:34,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:03:34,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:03:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:03:34,333 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:03:34,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:03:34,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:03:34,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:34,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:03:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:34,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:35,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709739076] [2022-11-03 02:03:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709739076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1387612689] [2022-11-03 02:03:35,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:03:35,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:35,264 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:35,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 02:03:37,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:03:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:37,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:03:37,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:37,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1387612689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:37,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621899942] [2022-11-03 02:03:37,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:03:37,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:37,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:37,562 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:37,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:04:08,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:04:08,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:04:08,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:04:08,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:08,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:09,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621899942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:09,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:09,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-11-03 02:04:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707113626] [2022-11-03 02:04:09,103 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:04:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:04:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:04:09,105 INFO L87 Difference]: Start difference. First operand 1179 states and 1341 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:04:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:10,265 INFO L93 Difference]: Finished difference Result 1200 states and 1368 transitions. [2022-11-03 02:04:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 02:04:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2022-11-03 02:04:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:10,270 INFO L225 Difference]: With dead ends: 1200 [2022-11-03 02:04:10,270 INFO L226 Difference]: Without dead ends: 1194 [2022-11-03 02:04:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:04:10,272 INFO L413 NwaCegarLoop]: 1015 mSDtfsCounter, 67 mSDsluCounter, 8077 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 9092 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:10,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 9092 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:04:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-11-03 02:04:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1188. [2022-11-03 02:04:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 757 states have (on average 1.7767503302509908) internal successors, (1345), 1182 states have internal predecessors, (1345), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:04:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1352 transitions. [2022-11-03 02:04:10,294 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1352 transitions. Word has length 77 [2022-11-03 02:04:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:10,294 INFO L495 AbstractCegarLoop]: Abstraction has 1188 states and 1352 transitions. [2022-11-03 02:04:10,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:04:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1352 transitions. [2022-11-03 02:04:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 02:04:10,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:10,296 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:04:10,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:10,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:10,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:10,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:10,912 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 632 more)] === [2022-11-03 02:04:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:10,912 INFO L85 PathProgramCache]: Analyzing trace with hash -570392561, now seen corresponding path program 3 times [2022-11-03 02:04:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:10,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777845260] [2022-11-03 02:04:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:04:10,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:10,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:10,914 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:10,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:04:11,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 02:04:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:04:11,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:04:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:11,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:12,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:12,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777845260] [2022-11-03 02:04:12,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777845260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:13,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1671244710] [2022-11-03 02:04:13,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:04:13,000 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:13,012 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:13,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:04:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 02:04:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:04:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:04:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:18,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1671244710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097847725] [2022-11-03 02:04:19,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:04:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:19,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:19,175 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:19,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eba38b66-4c29-4d1c-a8a3-6a5c58cae7d1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process