./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-queue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:25:12,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:25:12,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:25:12,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:25:12,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:25:12,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:25:12,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:25:12,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:25:12,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:25:12,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:25:12,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:25:12,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:25:12,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:25:12,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:25:12,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:25:12,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:25:12,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:25:12,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:25:12,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:25:12,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:25:12,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:25:12,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:25:12,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:25:12,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:25:12,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:25:12,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:25:12,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:25:12,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:25:12,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:25:12,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:25:12,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:25:12,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:25:12,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:25:12,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:25:12,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:25:12,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:25:12,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:25:12,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:25:12,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:25:12,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:25:12,681 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:25:12,682 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:25:12,732 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:25:12,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:25:12,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:25:12,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:25:12,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:25:12,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:25:12,735 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:25:12,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:25:12,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:25:12,736 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:25:12,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:25:12,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:25:12,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:25:12,737 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:25:12,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:25:12,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:25:12,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:25:12,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:25:12,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:25:12,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:25:12,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:25:12,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:25:12,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:25:12,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:25:12,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:25:12,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:25:12,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:25:12,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:25:12,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:25:12,743 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 [2021-11-07 07:25:13,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:25:13,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:25:13,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:25:13,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:25:13,106 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:25:13,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/forester-heap/dll-queue-1.i [2021-11-07 07:25:13,230 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/80a9e0f88/bd8c2cc3f39e4a6e91d8be2358f51eb0/FLAG2a7c3ca62 [2021-11-07 07:25:13,865 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:25:13,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i [2021-11-07 07:25:13,891 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/80a9e0f88/bd8c2cc3f39e4a6e91d8be2358f51eb0/FLAG2a7c3ca62 [2021-11-07 07:25:14,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/80a9e0f88/bd8c2cc3f39e4a6e91d8be2358f51eb0 [2021-11-07 07:25:14,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:25:14,120 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:25:14,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:25:14,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:25:14,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:25:14,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b408540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14, skipping insertion in model container [2021-11-07 07:25:14,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:25:14,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:25:14,578 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22460,22473] [2021-11-07 07:25:14,582 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22531,22544] [2021-11-07 07:25:14,588 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22605,22618] [2021-11-07 07:25:14,590 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22697,22710] [2021-11-07 07:25:14,593 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22774,22787] [2021-11-07 07:25:14,594 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22869,22882] [2021-11-07 07:25:14,595 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22946,22959] [2021-11-07 07:25:14,596 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23029,23042] [2021-11-07 07:25:14,597 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23124,23137] [2021-11-07 07:25:14,598 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23201,23214] [2021-11-07 07:25:14,600 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23284,23297] [2021-11-07 07:25:14,601 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23373,23386] [2021-11-07 07:25:14,602 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23459,23472] [2021-11-07 07:25:14,604 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23604,23617] [2021-11-07 07:25:14,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:25:14,618 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:25:14,681 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22460,22473] [2021-11-07 07:25:14,690 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22531,22544] [2021-11-07 07:25:14,692 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22605,22618] [2021-11-07 07:25:14,704 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22697,22710] [2021-11-07 07:25:14,705 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22774,22787] [2021-11-07 07:25:14,706 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22869,22882] [2021-11-07 07:25:14,707 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22946,22959] [2021-11-07 07:25:14,708 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23029,23042] [2021-11-07 07:25:14,709 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23124,23137] [2021-11-07 07:25:14,710 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23201,23214] [2021-11-07 07:25:14,711 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23284,23297] [2021-11-07 07:25:14,712 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23373,23386] [2021-11-07 07:25:14,716 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23459,23472] [2021-11-07 07:25:14,717 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23604,23617] [2021-11-07 07:25:14,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:25:14,753 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:25:14,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14 WrapperNode [2021-11-07 07:25:14,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:25:14,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:25:14,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:25:14,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:25:14,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:25:14,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:25:14,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:25:14,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:25:14,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (1/1) ... [2021-11-07 07:25:14,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:25:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:14,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:25:14,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:25:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:25:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:25:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:25:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:25:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:25:14,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:25:14,948 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:25:14,949 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:25:14,950 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:25:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:25:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:25:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:25:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:25:14,955 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:25:14,956 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:25:14,957 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:25:14,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:25:14,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:25:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:25:14,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:25:15,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:25:15,826 INFO L299 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-07 07:25:15,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:25:15 BoogieIcfgContainer [2021-11-07 07:25:15,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:25:15,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:25:15,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:25:15,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:25:15,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:25:14" (1/3) ... [2021-11-07 07:25:15,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391ce59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:25:15, skipping insertion in model container [2021-11-07 07:25:15,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:14" (2/3) ... [2021-11-07 07:25:15,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391ce59e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:25:15, skipping insertion in model container [2021-11-07 07:25:15,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:25:15" (3/3) ... [2021-11-07 07:25:15,844 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-1.i [2021-11-07 07:25:15,849 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:25:15,849 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2021-11-07 07:25:15,909 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:25:15,921 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:25:15,922 INFO L340 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2021-11-07 07:25:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 105 states have (on average 2.257142857142857) internal successors, (237), 181 states have internal predecessors, (237), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:25:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:25:15,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:15,973 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:15,974 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1640966847, now seen corresponding path program 1 times [2021-11-07 07:25:16,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:16,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664216659] [2021-11-07 07:25:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:16,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:16,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:16,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:16,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664216659] [2021-11-07 07:25:16,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664216659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:16,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:16,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:16,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392952125] [2021-11-07 07:25:16,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:16,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:16,357 INFO L87 Difference]: Start difference. First operand has 186 states, 105 states have (on average 2.257142857142857) internal successors, (237), 181 states have internal predecessors, (237), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:16,810 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2021-11-07 07:25:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:16,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:25:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:16,823 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:25:16,824 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 07:25:16,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 07:25:16,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2021-11-07 07:25:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 106 states have (on average 1.7264150943396226) internal successors, (183), 170 states have internal predecessors, (183), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 186 transitions. [2021-11-07 07:25:16,877 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 186 transitions. Word has length 7 [2021-11-07 07:25:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:16,877 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 186 transitions. [2021-11-07 07:25:16,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 186 transitions. [2021-11-07 07:25:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:25:16,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:16,879 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:16,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:25:16,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:16,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1640966846, now seen corresponding path program 1 times [2021-11-07 07:25:16,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:16,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283489021] [2021-11-07 07:25:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:16,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:17,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:17,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283489021] [2021-11-07 07:25:17,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283489021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:17,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:17,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:25:17,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796013452] [2021-11-07 07:25:17,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:17,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:17,023 INFO L87 Difference]: Start difference. First operand 174 states and 186 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:17,382 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2021-11-07 07:25:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:25:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:17,390 INFO L225 Difference]: With dead ends: 167 [2021-11-07 07:25:17,390 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:25:17,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:25:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2021-11-07 07:25:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 106 states have (on average 1.6132075471698113) internal successors, (171), 159 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2021-11-07 07:25:17,415 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 7 [2021-11-07 07:25:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:17,416 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2021-11-07 07:25:17,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2021-11-07 07:25:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:25:17,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:17,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:17,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:25:17,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash 438656555, now seen corresponding path program 1 times [2021-11-07 07:25:17,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:17,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279975385] [2021-11-07 07:25:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:17,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:17,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:17,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:17,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279975385] [2021-11-07 07:25:17,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279975385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:17,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:17,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:25:17,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127222535] [2021-11-07 07:25:17,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:17,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:17,627 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:18,057 INFO L93 Difference]: Finished difference Result 267 states and 281 transitions. [2021-11-07 07:25:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:25:18,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 07:25:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:18,060 INFO L225 Difference]: With dead ends: 267 [2021-11-07 07:25:18,060 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 07:25:18,060 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 07:25:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 173. [2021-11-07 07:25:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 169 states have internal predecessors, (187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2021-11-07 07:25:18,083 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 13 [2021-11-07 07:25:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:18,083 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2021-11-07 07:25:18,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2021-11-07 07:25:18,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:25:18,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:18,084 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:18,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:25:18,085 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:18,086 INFO L85 PathProgramCache]: Analyzing trace with hash 438656554, now seen corresponding path program 1 times [2021-11-07 07:25:18,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:18,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041655744] [2021-11-07 07:25:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:18,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:18,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:18,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041655744] [2021-11-07 07:25:18,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041655744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:18,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:18,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:25:18,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656910555] [2021-11-07 07:25:18,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:18,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:18,230 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:18,530 INFO L93 Difference]: Finished difference Result 179 states and 192 transitions. [2021-11-07 07:25:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:25:18,531 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 07:25:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:18,532 INFO L225 Difference]: With dead ends: 179 [2021-11-07 07:25:18,532 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 07:25:18,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:18,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 07:25:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2021-11-07 07:25:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 121 states have (on average 1.537190082644628) internal successors, (186), 168 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 189 transitions. [2021-11-07 07:25:18,544 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 189 transitions. Word has length 13 [2021-11-07 07:25:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:18,544 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 189 transitions. [2021-11-07 07:25:18,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 189 transitions. [2021-11-07 07:25:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:25:18,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:18,546 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:18,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:25:18,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:18,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash 713452148, now seen corresponding path program 1 times [2021-11-07 07:25:18,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:18,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452102577] [2021-11-07 07:25:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:18,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:18,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:18,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452102577] [2021-11-07 07:25:18,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452102577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:18,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:18,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:25:18,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178304849] [2021-11-07 07:25:18,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:18,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:18,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:18,634 INFO L87 Difference]: Start difference. First operand 172 states and 189 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:18,854 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2021-11-07 07:25:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-07 07:25:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:18,856 INFO L225 Difference]: With dead ends: 162 [2021-11-07 07:25:18,856 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 07:25:18,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 07:25:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-11-07 07:25:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 116 states have (on average 1.5086206896551724) internal successors, (175), 158 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 178 transitions. [2021-11-07 07:25:18,866 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 178 transitions. Word has length 14 [2021-11-07 07:25:18,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:18,867 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 178 transitions. [2021-11-07 07:25:18,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 178 transitions. [2021-11-07 07:25:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:25:18,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:18,868 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:18,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:25:18,869 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:18,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1568078500, now seen corresponding path program 1 times [2021-11-07 07:25:18,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:18,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501674284] [2021-11-07 07:25:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:18,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:18,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501674284] [2021-11-07 07:25:18,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501674284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:18,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:18,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:18,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235590296] [2021-11-07 07:25:18,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:25:18,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:25:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:18,978 INFO L87 Difference]: Start difference. First operand 162 states and 178 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:19,298 INFO L93 Difference]: Finished difference Result 161 states and 176 transitions. [2021-11-07 07:25:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:25:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-07 07:25:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:19,301 INFO L225 Difference]: With dead ends: 161 [2021-11-07 07:25:19,301 INFO L226 Difference]: Without dead ends: 161 [2021-11-07 07:25:19,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:25:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-07 07:25:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-07 07:25:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 116 states have (on average 1.4913793103448276) internal successors, (173), 157 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2021-11-07 07:25:19,308 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 16 [2021-11-07 07:25:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:19,308 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2021-11-07 07:25:19,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2021-11-07 07:25:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:25:19,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:19,311 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:19,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:25:19,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1568078499, now seen corresponding path program 1 times [2021-11-07 07:25:19,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:19,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510748874] [2021-11-07 07:25:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:19,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:19,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:19,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:19,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510748874] [2021-11-07 07:25:19,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510748874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:19,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:19,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:19,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132892810] [2021-11-07 07:25:19,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:25:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:25:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:19,400 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:19,719 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-11-07 07:25:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:25:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-07 07:25:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:19,722 INFO L225 Difference]: With dead ends: 160 [2021-11-07 07:25:19,722 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 07:25:19,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:25:19,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 07:25:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-07 07:25:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 116 states have (on average 1.4741379310344827) internal successors, (171), 156 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2021-11-07 07:25:19,728 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 16 [2021-11-07 07:25:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:19,728 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2021-11-07 07:25:19,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2021-11-07 07:25:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:25:19,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:19,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:25:19,730 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -167280247, now seen corresponding path program 1 times [2021-11-07 07:25:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:19,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828868464] [2021-11-07 07:25:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:19,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:19,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:19,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828868464] [2021-11-07 07:25:19,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828868464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:19,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:19,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:25:19,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962795702] [2021-11-07 07:25:19,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:19,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:19,786 INFO L87 Difference]: Start difference. First operand 160 states and 174 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:20,010 INFO L93 Difference]: Finished difference Result 212 states and 232 transitions. [2021-11-07 07:25:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:20,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-07 07:25:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:20,014 INFO L225 Difference]: With dead ends: 212 [2021-11-07 07:25:20,014 INFO L226 Difference]: Without dead ends: 212 [2021-11-07 07:25:20,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-07 07:25:20,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2021-11-07 07:25:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 124 states have (on average 1.4596774193548387) internal successors, (181), 164 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2021-11-07 07:25:20,022 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 20 [2021-11-07 07:25:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:20,022 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2021-11-07 07:25:20,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2021-11-07 07:25:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:25:20,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:20,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:20,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:25:20,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2121028066, now seen corresponding path program 1 times [2021-11-07 07:25:20,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:20,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359375673] [2021-11-07 07:25:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:20,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:20,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:20,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:20,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359375673] [2021-11-07 07:25:20,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359375673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:20,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:20,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 07:25:20,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453954243] [2021-11-07 07:25:20,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:25:20,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:25:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:25:20,243 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:20,755 INFO L93 Difference]: Finished difference Result 171 states and 183 transitions. [2021-11-07 07:25:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:25:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-07 07:25:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:20,757 INFO L225 Difference]: With dead ends: 171 [2021-11-07 07:25:20,757 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 07:25:20,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:25:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 07:25:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-11-07 07:25:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 124 states have (on average 1.4435483870967742) internal successors, (179), 163 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 182 transitions. [2021-11-07 07:25:20,764 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 182 transitions. Word has length 20 [2021-11-07 07:25:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:20,765 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 182 transitions. [2021-11-07 07:25:20,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 182 transitions. [2021-11-07 07:25:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:25:20,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:20,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:20,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:25:20,766 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2121028065, now seen corresponding path program 1 times [2021-11-07 07:25:20,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:20,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141644358] [2021-11-07 07:25:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:20,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:20,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:20,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:20,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141644358] [2021-11-07 07:25:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141644358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:20,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:20,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-07 07:25:20,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100458285] [2021-11-07 07:25:20,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:25:20,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:25:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:25:20,982 INFO L87 Difference]: Start difference. First operand 167 states and 182 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:21,734 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2021-11-07 07:25:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:25:21,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-07 07:25:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:21,737 INFO L225 Difference]: With dead ends: 166 [2021-11-07 07:25:21,737 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 07:25:21,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:25:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 07:25:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-07 07:25:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 124 states have (on average 1.3790322580645162) internal successors, (171), 156 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 174 transitions. [2021-11-07 07:25:21,744 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 174 transitions. Word has length 20 [2021-11-07 07:25:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:21,745 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 174 transitions. [2021-11-07 07:25:21,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 174 transitions. [2021-11-07 07:25:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 07:25:21,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:21,746 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:25:21,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:25:21,747 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr65REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash -886686117, now seen corresponding path program 1 times [2021-11-07 07:25:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:21,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747485985] [2021-11-07 07:25:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:21,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:21,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:21,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747485985] [2021-11-07 07:25:21,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747485985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:21,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:21,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:21,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9075611] [2021-11-07 07:25:21,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:21,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:21,831 INFO L87 Difference]: Start difference. First operand 160 states and 174 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:22,047 INFO L93 Difference]: Finished difference Result 193 states and 209 transitions. [2021-11-07 07:25:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:25:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-07 07:25:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:22,049 INFO L225 Difference]: With dead ends: 193 [2021-11-07 07:25:22,049 INFO L226 Difference]: Without dead ends: 193 [2021-11-07 07:25:22,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-07 07:25:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 171. [2021-11-07 07:25:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.3703703703703705) internal successors, (185), 167 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2021-11-07 07:25:22,057 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 25 [2021-11-07 07:25:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:22,057 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2021-11-07 07:25:22,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,058 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2021-11-07 07:25:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:25:22,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:22,060 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:25:22,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:25:22,061 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr73ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1721029433, now seen corresponding path program 1 times [2021-11-07 07:25:22,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:22,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43568674] [2021-11-07 07:25:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:22,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:22,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:22,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:22,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43568674] [2021-11-07 07:25:22,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43568674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:22,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:22,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 07:25:22,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206510070] [2021-11-07 07:25:22,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:25:22,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:25:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:22,185 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:22,458 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2021-11-07 07:25:22,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:25:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 07:25:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:22,460 INFO L225 Difference]: With dead ends: 169 [2021-11-07 07:25:22,460 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 07:25:22,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:25:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 07:25:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2021-11-07 07:25:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 129 states have (on average 1.3565891472868217) internal successors, (175), 161 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 178 transitions. [2021-11-07 07:25:22,466 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 178 transitions. Word has length 27 [2021-11-07 07:25:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:22,467 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 178 transitions. [2021-11-07 07:25:22,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 178 transitions. [2021-11-07 07:25:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:25:22,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:22,472 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:25:22,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:25:22,472 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr73ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash 53977929, now seen corresponding path program 1 times [2021-11-07 07:25:22,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:22,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696271637] [2021-11-07 07:25:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:22,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:22,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:22,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696271637] [2021-11-07 07:25:22,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696271637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:22,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:22,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:25:22,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629715070] [2021-11-07 07:25:22,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:25:22,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:22,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:25:22,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:22,576 INFO L87 Difference]: Start difference. First operand 165 states and 178 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:22,860 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-07 07:25:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:25:22,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 07:25:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:22,862 INFO L225 Difference]: With dead ends: 165 [2021-11-07 07:25:22,862 INFO L226 Difference]: Without dead ends: 165 [2021-11-07 07:25:22,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:25:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-07 07:25:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-07 07:25:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 129 states have (on average 1.3488372093023255) internal successors, (174), 161 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-11-07 07:25:22,870 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 27 [2021-11-07 07:25:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:22,873 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-11-07 07:25:22,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-11-07 07:25:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:25:22,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:22,880 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:25:22,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:25:22,881 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1557275523, now seen corresponding path program 1 times [2021-11-07 07:25:22,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:22,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975554035] [2021-11-07 07:25:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:22,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:23,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:23,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:23,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975554035] [2021-11-07 07:25:23,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975554035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:23,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:23,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-07 07:25:23,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275965136] [2021-11-07 07:25:23,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:25:23,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:25:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:25:23,081 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:23,718 INFO L93 Difference]: Finished difference Result 249 states and 265 transitions. [2021-11-07 07:25:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:25:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 07:25:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:23,721 INFO L225 Difference]: With dead ends: 249 [2021-11-07 07:25:23,721 INFO L226 Difference]: Without dead ends: 249 [2021-11-07 07:25:23,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:25:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-07 07:25:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 170. [2021-11-07 07:25:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 134 states have (on average 1.335820895522388) internal successors, (179), 166 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 182 transitions. [2021-11-07 07:25:23,731 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 182 transitions. Word has length 27 [2021-11-07 07:25:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:23,731 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 182 transitions. [2021-11-07 07:25:23,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 182 transitions. [2021-11-07 07:25:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:25:23,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:23,734 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:23,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:25:23,735 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr70REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1739176556, now seen corresponding path program 1 times [2021-11-07 07:25:23,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:23,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532456566] [2021-11-07 07:25:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:23,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:23,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:23,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:23,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532456566] [2021-11-07 07:25:23,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532456566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:23,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835601858] [2021-11-07 07:25:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:23,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:23,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:23,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:23,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:25:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:24,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:25:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:24,333 INFO L388 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 29 treesize of output 21 [2021-11-07 07:25:24,338 INFO L388 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 18 treesize of output 10 [2021-11-07 07:25:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:24,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835601858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:24,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:24,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-11-07 07:25:24,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310403040] [2021-11-07 07:25:24,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:25:24,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:25:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:25:24,384 INFO L87 Difference]: Start difference. First operand 170 states and 182 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:24,925 INFO L93 Difference]: Finished difference Result 199 states and 215 transitions. [2021-11-07 07:25:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:25:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-07 07:25:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:24,928 INFO L225 Difference]: With dead ends: 199 [2021-11-07 07:25:24,928 INFO L226 Difference]: Without dead ends: 199 [2021-11-07 07:25:24,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:25:24,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-07 07:25:24,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 180. [2021-11-07 07:25:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 144 states have (on average 1.3194444444444444) internal successors, (190), 176 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 193 transitions. [2021-11-07 07:25:24,936 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 193 transitions. Word has length 30 [2021-11-07 07:25:24,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:24,936 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 193 transitions. [2021-11-07 07:25:24,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 193 transitions. [2021-11-07 07:25:24,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:25:24,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:24,938 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:25:24,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:25,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:25:25,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr75ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:25,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1920102720, now seen corresponding path program 1 times [2021-11-07 07:25:25,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:25,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735082699] [2021-11-07 07:25:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:25,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:25,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:25:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:25,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:25:25,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735082699] [2021-11-07 07:25:25,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735082699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:25,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967968348] [2021-11-07 07:25:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:25,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:25,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:25,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:25:25,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:25:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:25:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:25,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967968348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:25:25,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:25:25,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 07:25:25,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810074606] [2021-11-07 07:25:25,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:25:25,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:25:25,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:25:25,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:25:25,709 INFO L87 Difference]: Start difference. First operand 180 states and 193 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:26,186 INFO L93 Difference]: Finished difference Result 190 states and 202 transitions. [2021-11-07 07:25:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:25:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 07:25:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:26,187 INFO L225 Difference]: With dead ends: 190 [2021-11-07 07:25:26,187 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 07:25:26,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:25:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 07:25:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-07 07:25:26,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.3333333333333333) internal successors, (180), 167 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 183 transitions. [2021-11-07 07:25:26,193 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 183 transitions. Word has length 31 [2021-11-07 07:25:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:26,193 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 183 transitions. [2021-11-07 07:25:26,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 183 transitions. [2021-11-07 07:25:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 07:25:26,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:26,195 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:26,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:26,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:25:26,418 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr28ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 512130297, now seen corresponding path program 1 times [2021-11-07 07:25:26,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:25:26,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142160871] [2021-11-07 07:25:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:26,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:25:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:26,490 ERROR L253 erpolLogProxyWrapper]: Interpolant 14 not inductive [2021-11-07 07:25:26,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:25:26,497 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 07:25:26,503 INFO L168 Benchmark]: Toolchain (without parser) took 12381.44 ms. Allocated memory was 90.2 MB in the beginning and 142.6 MB in the end (delta: 52.4 MB). Free memory was 54.2 MB in the beginning and 62.3 MB in the end (delta: -8.1 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:25:26,503 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory was 60.1 MB in the beginning and 60.1 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:25:26,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.01 ms. Allocated memory is still 90.2 MB. Free memory was 53.9 MB in the beginning and 55.2 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:25:26,505 INFO L168 Benchmark]: Boogie Preprocessor took 108.05 ms. Allocated memory is still 90.2 MB. Free memory was 55.2 MB in the beginning and 52.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 07:25:26,505 INFO L168 Benchmark]: RCFGBuilder took 965.18 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 51.7 MB in the beginning and 70.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2021-11-07 07:25:26,506 INFO L168 Benchmark]: TraceAbstraction took 10670.24 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 70.1 MB in the beginning and 62.3 MB in the end (delta: 7.8 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. [2021-11-07 07:25:26,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 90.2 MB. Free memory was 60.1 MB in the beginning and 60.1 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 631.01 ms. Allocated memory is still 90.2 MB. Free memory was 53.9 MB in the beginning and 55.2 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 108.05 ms. Allocated memory is still 90.2 MB. Free memory was 55.2 MB in the beginning and 52.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 965.18 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 51.7 MB in the beginning and 70.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10670.24 ms. Allocated memory was 111.1 MB in the beginning and 142.6 MB in the end (delta: 31.5 MB). Free memory was 70.1 MB in the beginning and 62.3 MB in the end (delta: 7.8 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-07 07:25:26,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:25:29,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:25:29,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:25:29,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:25:29,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:25:29,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:25:29,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:25:29,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:25:29,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:25:29,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:25:29,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:25:29,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:25:29,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:25:29,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:25:29,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:25:29,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:25:29,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:25:29,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:25:29,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:25:29,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:25:29,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:25:29,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:25:29,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:25:29,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:25:29,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:25:29,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:25:29,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:25:29,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:25:29,601 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:25:29,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:25:29,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:25:29,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:25:29,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:25:29,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:25:29,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:25:29,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:25:29,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:25:29,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:25:29,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:25:29,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:25:29,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:25:29,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 07:25:29,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:25:29,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:25:29,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:25:29,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:25:29,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:25:29,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:25:29,688 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:25:29,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:25:29,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:25:29,689 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:25:29,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:25:29,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:25:29,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:25:29,691 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:25:29,691 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:25:29,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:25:29,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:25:29,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:25:29,692 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 07:25:29,693 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 07:25:29,693 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:25:29,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:25:29,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:25:29,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:25:29,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:25:29,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:25:29,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:25:29,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:25:29,695 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 07:25:29,695 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 07:25:29,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:25:29,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 07:25:29,696 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 [2021-11-07 07:25:30,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:25:30,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:25:30,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:25:30,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:25:30,240 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:25:30,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/forester-heap/dll-queue-1.i [2021-11-07 07:25:30,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/1fa41f7ff/bdbb1754197e47e4a4da4417e19ef0c2/FLAGecf8d7bda [2021-11-07 07:25:31,027 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:25:31,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i [2021-11-07 07:25:31,041 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/1fa41f7ff/bdbb1754197e47e4a4da4417e19ef0c2/FLAGecf8d7bda [2021-11-07 07:25:31,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/data/1fa41f7ff/bdbb1754197e47e4a4da4417e19ef0c2 [2021-11-07 07:25:31,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:25:31,303 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:25:31,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:25:31,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:25:31,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:25:31,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:25:31" (1/1) ... [2021-11-07 07:25:31,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@957053b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:31, skipping insertion in model container [2021-11-07 07:25:31,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:25:31" (1/1) ... [2021-11-07 07:25:31,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:25:31,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:25:31,826 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22460,22473] [2021-11-07 07:25:31,833 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22531,22544] [2021-11-07 07:25:31,836 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22605,22618] [2021-11-07 07:25:31,839 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22697,22710] [2021-11-07 07:25:31,841 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22774,22787] [2021-11-07 07:25:31,844 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22869,22882] [2021-11-07 07:25:31,846 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22946,22959] [2021-11-07 07:25:31,850 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23029,23042] [2021-11-07 07:25:31,852 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23124,23137] [2021-11-07 07:25:31,854 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23201,23214] [2021-11-07 07:25:31,861 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23284,23297] [2021-11-07 07:25:31,866 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23373,23386] [2021-11-07 07:25:31,868 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23459,23472] [2021-11-07 07:25:31,872 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23604,23617] [2021-11-07 07:25:31,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:25:31,898 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:25:31,947 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22460,22473] [2021-11-07 07:25:31,948 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22531,22544] [2021-11-07 07:25:31,949 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22605,22618] [2021-11-07 07:25:31,950 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22697,22710] [2021-11-07 07:25:31,951 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22774,22787] [2021-11-07 07:25:31,952 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22869,22882] [2021-11-07 07:25:31,953 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[22946,22959] [2021-11-07 07:25:31,957 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23029,23042] [2021-11-07 07:25:31,958 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23124,23137] [2021-11-07 07:25:31,960 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23201,23214] [2021-11-07 07:25:31,961 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23284,23297] [2021-11-07 07:25:31,962 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23373,23386] [2021-11-07 07:25:31,964 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23459,23472] [2021-11-07 07:25:31,966 WARN L228 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_8a71a48d-bde4-4a52-988a-3e18ee88afd8/sv-benchmarks/c/forester-heap/dll-queue-1.i[23604,23617] [2021-11-07 07:25:31,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:25:32,012 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:25:32,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32 WrapperNode [2021-11-07 07:25:32,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:25:32,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:25:32,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:25:32,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:25:32,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:25:32,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:25:32,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:25:32,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:25:32,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (1/1) ... [2021-11-07 07:25:32,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:25:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:25:32,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:25:32,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:25:32,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:25:32,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:25:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:25:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:25:32,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:25:32,230 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:25:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:25:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:25:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:25:32,231 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:25:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:25:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:25:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:25:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:25:32,232 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:25:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:25:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:25:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:25:32,233 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:25:32,234 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:25:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:25:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:25:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:25:32,235 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:25:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:25:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:25:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:25:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:25:32,236 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:25:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:25:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:25:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:25:32,237 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:25:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:25:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:25:32,238 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:25:32,239 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:25:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:25:32,240 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:25:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:25:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:25:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:25:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:25:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:25:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:25:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:25:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:25:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:25:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:25:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:25:32,245 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:25:32,271 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:25:32,271 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:25:32,272 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:25:32,273 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:25:32,273 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:25:32,273 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:25:32,273 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:25:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:25:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-07 07:25:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:25:32,274 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:25:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:25:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:25:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:25:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:25:32,275 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:25:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:25:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:25:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:25:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:25:32,276 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:25:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:25:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:25:32,277 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:25:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:25:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:25:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:25:32,278 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:25:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:25:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:25:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:25:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:25:32,279 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:25:32,280 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:25:32,281 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:25:32,281 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:25:32,281 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:25:32,282 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:25:32,282 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:25:32,282 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:25:32,282 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:25:32,282 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:25:32,283 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:25:32,283 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:25:32,283 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:25:32,283 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:25:32,284 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:25:32,285 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:25:32,288 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:25:32,289 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:25:32,289 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:25:32,289 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:25:32,289 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:25:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:25:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:25:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:25:32,291 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:25:32,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 07:25:32,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:25:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:25:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:25:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:25:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:25:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:25:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:25:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:25:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 07:25:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:25:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 07:25:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:25:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:25:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:25:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:25:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:25:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 07:25:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 07:25:33,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:25:33,580 INFO L299 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-07 07:25:33,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:25:33 BoogieIcfgContainer [2021-11-07 07:25:33,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:25:33,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:25:33,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:25:33,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:25:33,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:25:31" (1/3) ... [2021-11-07 07:25:33,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d36cb75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:25:33, skipping insertion in model container [2021-11-07 07:25:33,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:25:32" (2/3) ... [2021-11-07 07:25:33,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d36cb75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:25:33, skipping insertion in model container [2021-11-07 07:25:33,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:25:33" (3/3) ... [2021-11-07 07:25:33,596 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-1.i [2021-11-07 07:25:33,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:25:33,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 76 error locations. [2021-11-07 07:25:33,676 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:25:33,684 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:25:33,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 76 error locations. [2021-11-07 07:25:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 102 states have (on average 2.284313725490196) internal successors, (233), 178 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 07:25:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:25:33,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:33,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:33,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1450227185, now seen corresponding path program 1 times [2021-11-07 07:25:33,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:33,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41944139] [2021-11-07 07:25:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:33,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:33,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:33,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:33,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:25:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:33,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:25:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:34,097 INFO L388 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 [2021-11-07 07:25:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:34,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:34,192 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:34,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41944139] [2021-11-07 07:25:34,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41944139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:34,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:34,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:25:34,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31953129] [2021-11-07 07:25:34,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:34,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:34,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:34,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:34,222 INFO L87 Difference]: Start difference. First operand has 183 states, 102 states have (on average 2.284313725490196) internal successors, (233), 178 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:34,624 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2021-11-07 07:25:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:25:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:34,640 INFO L225 Difference]: With dead ends: 179 [2021-11-07 07:25:34,640 INFO L226 Difference]: Without dead ends: 175 [2021-11-07 07:25:34,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-07 07:25:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-11-07 07:25:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 103 states have (on average 1.7378640776699028) internal successors, (179), 167 states have internal predecessors, (179), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 182 transitions. [2021-11-07 07:25:34,701 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 182 transitions. Word has length 7 [2021-11-07 07:25:34,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:34,701 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 182 transitions. [2021-11-07 07:25:34,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 182 transitions. [2021-11-07 07:25:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:25:34,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:34,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:34,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:34,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:34,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1450227184, now seen corresponding path program 1 times [2021-11-07 07:25:34,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:34,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012458238] [2021-11-07 07:25:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:34,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:34,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:34,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:34,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:25:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:25:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:35,146 INFO L388 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 [2021-11-07 07:25:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:35,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:35,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:35,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012458238] [2021-11-07 07:25:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012458238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:35,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:35,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:25:35,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482417169] [2021-11-07 07:25:35,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:35,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:35,279 INFO L87 Difference]: Start difference. First operand 171 states and 182 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:35,714 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-11-07 07:25:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:25:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:35,721 INFO L225 Difference]: With dead ends: 164 [2021-11-07 07:25:35,721 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 07:25:35,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 07:25:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2021-11-07 07:25:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 103 states have (on average 1.6213592233009708) internal successors, (167), 156 states have internal predecessors, (167), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2021-11-07 07:25:35,738 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 7 [2021-11-07 07:25:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:35,739 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2021-11-07 07:25:35,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2021-11-07 07:25:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:25:35,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:35,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:35,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:35,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:35,955 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1481763738, now seen corresponding path program 1 times [2021-11-07 07:25:35,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:35,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465761037] [2021-11-07 07:25:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:35,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:35,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:35,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:35,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:25:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:36,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:25:36,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:36,167 INFO L388 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 [2021-11-07 07:25:36,250 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 07:25:36,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-11-07 07:25:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:36,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:36,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:36,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465761037] [2021-11-07 07:25:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465761037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:36,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:36,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 07:25:36,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867238781] [2021-11-07 07:25:36,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:36,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:36,429 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:36,830 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-11-07 07:25:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:25:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 07:25:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:36,832 INFO L225 Difference]: With dead ends: 169 [2021-11-07 07:25:36,832 INFO L226 Difference]: Without dead ends: 169 [2021-11-07 07:25:36,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 10 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-07 07:25:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2021-11-07 07:25:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 110 states have (on average 1.5636363636363637) internal successors, (172), 157 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 175 transitions. [2021-11-07 07:25:36,872 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 175 transitions. Word has length 12 [2021-11-07 07:25:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:36,872 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 175 transitions. [2021-11-07 07:25:36,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:36,873 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 175 transitions. [2021-11-07 07:25:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:25:36,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:36,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:36,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:37,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:37,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1481763739, now seen corresponding path program 1 times [2021-11-07 07:25:37,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:37,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16992640] [2021-11-07 07:25:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:37,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:37,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:37,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:37,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:25:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:25:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:37,307 INFO L388 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 [2021-11-07 07:25:37,391 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:25:37,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 07:25:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:37,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:37,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:37,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16992640] [2021-11-07 07:25:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16992640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:37,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:37,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-07 07:25:37,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120337905] [2021-11-07 07:25:37,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:25:37,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:25:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:37,813 INFO L87 Difference]: Start difference. First operand 161 states and 175 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:39,294 INFO L93 Difference]: Finished difference Result 254 states and 269 transitions. [2021-11-07 07:25:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:25:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 07:25:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:39,298 INFO L225 Difference]: With dead ends: 254 [2021-11-07 07:25:39,299 INFO L226 Difference]: Without dead ends: 254 [2021-11-07 07:25:39,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:25:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-07 07:25:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 161. [2021-11-07 07:25:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 112 states have (on average 1.5357142857142858) internal successors, (172), 157 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:39,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 175 transitions. [2021-11-07 07:25:39,334 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 175 transitions. Word has length 12 [2021-11-07 07:25:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:39,334 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 175 transitions. [2021-11-07 07:25:39,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 175 transitions. [2021-11-07 07:25:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 07:25:39,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:39,336 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:39,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:39,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:39,549 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:39,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1309963495, now seen corresponding path program 1 times [2021-11-07 07:25:39,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:39,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76086319] [2021-11-07 07:25:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:39,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:39,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:39,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:39,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 07:25:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:39,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:25:39,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:39,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:39,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:39,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76086319] [2021-11-07 07:25:39,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76086319] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:39,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:39,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 07:25:39,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888394296] [2021-11-07 07:25:39,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:25:39,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:39,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:25:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:39,802 INFO L87 Difference]: Start difference. First operand 161 states and 175 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:39,886 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2021-11-07 07:25:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:25:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 07:25:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:39,888 INFO L225 Difference]: With dead ends: 151 [2021-11-07 07:25:39,889 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 07:25:39,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:25:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 07:25:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-11-07 07:25:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 107 states have (on average 1.5046728971962617) internal successors, (161), 147 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 164 transitions. [2021-11-07 07:25:39,898 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 164 transitions. Word has length 13 [2021-11-07 07:25:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:39,899 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 164 transitions. [2021-11-07 07:25:39,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 164 transitions. [2021-11-07 07:25:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:25:39,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:39,901 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:39,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:40,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:40,114 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:40,115 INFO L85 PathProgramCache]: Analyzing trace with hash -450325663, now seen corresponding path program 1 times [2021-11-07 07:25:40,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:40,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249341281] [2021-11-07 07:25:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:40,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:40,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:40,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:40,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 07:25:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:25:40,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:40,375 INFO L388 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 [2021-11-07 07:25:40,419 INFO L388 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 20 treesize of output 16 [2021-11-07 07:25:40,453 INFO L388 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 22 treesize of output 14 [2021-11-07 07:25:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:40,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:40,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:40,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249341281] [2021-11-07 07:25:40,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249341281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:40,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:40,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 07:25:40,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137365385] [2021-11-07 07:25:40,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:25:40,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:25:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:25:40,546 INFO L87 Difference]: Start difference. First operand 151 states and 164 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:40,962 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2021-11-07 07:25:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:25:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 07:25:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:40,964 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:25:40,964 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 07:25:40,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:25:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 07:25:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-11-07 07:25:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 146 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2021-11-07 07:25:40,972 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 15 [2021-11-07 07:25:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2021-11-07 07:25:40,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2021-11-07 07:25:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:25:40,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:40,974 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:40,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:41,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:41,190 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash -450325662, now seen corresponding path program 1 times [2021-11-07 07:25:41,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:41,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220777430] [2021-11-07 07:25:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:41,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:41,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:41,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 07:25:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:41,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:25:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:41,414 INFO L388 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 [2021-11-07 07:25:41,450 INFO L388 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 11 treesize of output 7 [2021-11-07 07:25:41,461 INFO L388 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 17 treesize of output 13 [2021-11-07 07:25:41,524 INFO L388 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 31 treesize of output 23 [2021-11-07 07:25:41,536 INFO L388 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 20 treesize of output 12 [2021-11-07 07:25:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:41,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:41,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:41,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220777430] [2021-11-07 07:25:41,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220777430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:41,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:41,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 07:25:41,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008380850] [2021-11-07 07:25:41,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:25:41,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:25:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:25:41,840 INFO L87 Difference]: Start difference. First operand 150 states and 163 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:43,134 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-11-07 07:25:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:25:43,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 07:25:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:43,137 INFO L225 Difference]: With dead ends: 149 [2021-11-07 07:25:43,137 INFO L226 Difference]: Without dead ends: 149 [2021-11-07 07:25:43,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:25:43,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-07 07:25:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-07 07:25:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 1.485981308411215) internal successors, (159), 145 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 162 transitions. [2021-11-07 07:25:43,144 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 162 transitions. Word has length 15 [2021-11-07 07:25:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:43,144 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 162 transitions. [2021-11-07 07:25:43,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 162 transitions. [2021-11-07 07:25:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:25:43,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:43,146 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:43,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:43,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:43,366 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1568644530, now seen corresponding path program 1 times [2021-11-07 07:25:43,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:43,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249252982] [2021-11-07 07:25:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:43,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:43,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:43,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 07:25:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:25:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:43,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:43,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:43,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249252982] [2021-11-07 07:25:43,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249252982] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:43,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:43,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:25:43,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694680292] [2021-11-07 07:25:43,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:25:43,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:25:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:43,687 INFO L87 Difference]: Start difference. First operand 149 states and 162 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:43,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:43,742 INFO L93 Difference]: Finished difference Result 269 states and 296 transitions. [2021-11-07 07:25:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:25:43,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-07 07:25:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:43,745 INFO L225 Difference]: With dead ends: 269 [2021-11-07 07:25:43,746 INFO L226 Difference]: Without dead ends: 269 [2021-11-07 07:25:43,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:25:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-07 07:25:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 180. [2021-11-07 07:25:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 138 states have (on average 1.434782608695652) internal successors, (198), 176 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2021-11-07 07:25:43,755 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 19 [2021-11-07 07:25:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:43,756 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2021-11-07 07:25:43,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2021-11-07 07:25:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:25:43,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:43,758 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:43,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:25:43,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:43,972 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:43,973 INFO L85 PathProgramCache]: Analyzing trace with hash 772574947, now seen corresponding path program 1 times [2021-11-07 07:25:43,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:43,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684456584] [2021-11-07 07:25:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:43,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:43,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:43,975 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:43,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 07:25:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:44,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:25:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:44,324 INFO L388 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 [2021-11-07 07:25:44,402 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 07:25:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-07 07:25:44,478 INFO L388 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 24 treesize of output 20 [2021-11-07 07:25:44,666 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:25:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-07 07:25:44,823 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 07:25:44,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 45 [2021-11-07 07:25:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:45,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:25:46,633 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base)) c_main_~item~0.base) c_main_~item~0.offset))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 07:25:48,439 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base))) c_main_~item~0.base) c_main_~item~0.offset)))))))))))))) (_ bv1 1)))) is different from false [2021-11-07 07:25:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:48,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:25:48,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684456584] [2021-11-07 07:25:48,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684456584] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:25:48,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:25:48,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 14 [2021-11-07 07:25:48,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899366087] [2021-11-07 07:25:48,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:25:48,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:25:48,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:25:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=119, Unknown=2, NotChecked=46, Total=210 [2021-11-07 07:25:48,578 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:25:51,994 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2021-11-07 07:25:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:25:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-07 07:25:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:25:51,998 INFO L225 Difference]: With dead ends: 185 [2021-11-07 07:25:51,998 INFO L226 Difference]: Without dead ends: 185 [2021-11-07 07:25:51,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=134, Invalid=334, Unknown=2, NotChecked=82, Total=552 [2021-11-07 07:25:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-07 07:25:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 179. [2021-11-07 07:25:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 138 states have (on average 1.4130434782608696) internal successors, (195), 175 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2021-11-07 07:25:52,006 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 19 [2021-11-07 07:25:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:25:52,007 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2021-11-07 07:25:52,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:25:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2021-11-07 07:25:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 07:25:52,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:25:52,008 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:25:52,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 07:25:52,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:25:52,214 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:25:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:25:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 772574948, now seen corresponding path program 1 times [2021-11-07 07:25:52,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:25:52,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537209918] [2021-11-07 07:25:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:25:52,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:25:52,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:25:52,217 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:25:52,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 07:25:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:25:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:25:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:25:52,536 INFO L388 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 [2021-11-07 07:25:52,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:25:52,617 INFO L388 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 17 treesize of output 17 [2021-11-07 07:25:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:25:52,680 INFO L388 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 11 treesize of output 7 [2021-11-07 07:25:52,693 INFO L388 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 21 treesize of output 17 [2021-11-07 07:25:52,864 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:25:52,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-11-07 07:25:52,892 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-07 07:25:52,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-11-07 07:25:53,045 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 07:25:53,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-11-07 07:25:53,054 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-07 07:25:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-07 07:25:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:25:53,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:17,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:17,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537209918] [2021-11-07 07:26:17,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537209918] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:17,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:17,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-07 07:26:17,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880092187] [2021-11-07 07:26:17,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:26:17,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:26:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=194, Unknown=3, NotChecked=0, Total=240 [2021-11-07 07:26:17,321 INFO L87 Difference]: Start difference. First operand 179 states and 198 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:24,237 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv4 32) c_main_~item~0.offset)) (.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (and (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) .cse0 c_main_~item~0.offset)) c_main_~item~0.base) c_main_~item~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) .cse0 c_main_~item~0.base)) c_main_~item~0.base) c_main_~item~0.offset))))) (not (= .cse1 c_main_~item~0.base)) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.offset)) c_main_~item~0.base) c_main_~item~0.offset))) (bvule .cse2 (bvadd (_ bv4 32) .cse2)))) (bvule .cse3 (select |c_#length| c_main_~item~0.base)) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~item~0.base))))) (_ bv1 1))) (= (select (select |c_#memory_$Pointer$.offset| c_main_~item~0.base) c_main_~item~0.offset) (_ bv0 32)) (= |c_main_#t~mem7.offset| (_ bv0 32)) (bvule c_main_~item~0.offset .cse3) (= (select |c_#length| .cse1) (_ bv12 32)) (= (select |c_#length| |c_main_#t~mem7.base|) (_ bv12 32)) (exists ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset)) (.cse5 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.base| .cse4) .cse5) c_main_~item~0.base) (= (select (select |c_#memory_$Pointer$.offset| .cse4) .cse5) c_main_~item~0.offset)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1))))) is different from false [2021-11-07 07:26:35,741 WARN L207 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-11-07 07:26:37,982 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (and (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse0 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) .cse0 c_main_~item~0.offset)) c_main_~item~0.base) c_main_~item~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) .cse0 c_main_~item~0.base)) c_main_~item~0.base) c_main_~item~0.offset))))) (= c_main_~item~0.offset (_ bv0 32)) (not (= .cse1 c_main_~item~0.base)) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.offset)) c_main_~item~0.base) c_main_~item~0.offset))) (bvule .cse2 (bvadd (_ bv4 32) .cse2)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~item~0.base))))) (_ bv1 1))) (= (select (select |c_#memory_$Pointer$.offset| c_main_~item~0.base) c_main_~item~0.offset) (_ bv0 32)) (= (select |c_#length| .cse1) (_ bv12 32)) (exists ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset)) (.cse4 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) c_main_~item~0.base) (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) c_main_~item~0.offset)))) (= (select |c_#length| c_main_~item~0.base) (_ bv12 32)))) is different from false [2021-11-07 07:26:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:39,978 INFO L93 Difference]: Finished difference Result 189 states and 204 transitions. [2021-11-07 07:26:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:26:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-07 07:26:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:39,981 INFO L225 Difference]: With dead ends: 189 [2021-11-07 07:26:39,981 INFO L226 Difference]: Without dead ends: 189 [2021-11-07 07:26:39,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=8, NotChecked=118, Total=1056 [2021-11-07 07:26:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-07 07:26:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 174. [2021-11-07 07:26:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 138 states have (on average 1.355072463768116) internal successors, (187), 170 states have internal predecessors, (187), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2021-11-07 07:26:39,989 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 19 [2021-11-07 07:26:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2021-11-07 07:26:39,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2021-11-07 07:26:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:26:39,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:39,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:40,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:40,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:26:40,206 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr65REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:26:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash -524027192, now seen corresponding path program 1 times [2021-11-07 07:26:40,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:26:40,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449225930] [2021-11-07 07:26:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:40,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:26:40,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:26:40,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:26:40,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 07:26:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:40,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:26:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:40,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:40,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:40,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449225930] [2021-11-07 07:26:40,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449225930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:40,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:40,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 07:26:40,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531349380] [2021-11-07 07:26:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:26:40,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:26:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:26:40,628 INFO L87 Difference]: Start difference. First operand 174 states and 190 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:40,697 INFO L93 Difference]: Finished difference Result 205 states and 222 transitions. [2021-11-07 07:26:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:26:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-07 07:26:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:40,700 INFO L225 Difference]: With dead ends: 205 [2021-11-07 07:26:40,700 INFO L226 Difference]: Without dead ends: 205 [2021-11-07 07:26:40,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:26:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-07 07:26:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 183. [2021-11-07 07:26:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 147 states have (on average 1.346938775510204) internal successors, (198), 179 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 201 transitions. [2021-11-07 07:26:40,710 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 201 transitions. Word has length 22 [2021-11-07 07:26:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:40,710 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 201 transitions. [2021-11-07 07:26:40,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 201 transitions. [2021-11-07 07:26:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:26:40,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:40,714 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:26:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:40,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:26:40,928 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr73ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:26:40,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1098153036, now seen corresponding path program 1 times [2021-11-07 07:26:40,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:26:40,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258415395] [2021-11-07 07:26:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:40,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:26:40,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:26:40,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:26:40,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 07:26:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:26:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:41,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:41,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:41,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258415395] [2021-11-07 07:26:41,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258415395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:41,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:41,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-11-07 07:26:41,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900177309] [2021-11-07 07:26:41,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:26:41,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:41,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:26:41,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:26:41,626 INFO L87 Difference]: Start difference. First operand 183 states and 201 transitions. Second operand has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:26:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:42,172 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2021-11-07 07:26:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:26:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-07 07:26:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:42,176 INFO L225 Difference]: With dead ends: 187 [2021-11-07 07:26:42,176 INFO L226 Difference]: Without dead ends: 187 [2021-11-07 07:26:42,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:26:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-07 07:26:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2021-11-07 07:26:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 147 states have (on average 1.3401360544217686) internal successors, (197), 179 states have internal predecessors, (197), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2021-11-07 07:26:42,187 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 24 [2021-11-07 07:26:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:42,188 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2021-11-07 07:26:42,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:26:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2021-11-07 07:26:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:26:42,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:42,195 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:26:42,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:42,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:26:42,409 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr68REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:26:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1078994374, now seen corresponding path program 1 times [2021-11-07 07:26:42,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:26:42,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976609804] [2021-11-07 07:26:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:42,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:26:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:26:42,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:26:42,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 07:26:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:26:42,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:42,795 INFO L388 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 11 treesize of output 7 [2021-11-07 07:26:42,804 INFO L388 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 11 treesize of output 7 [2021-11-07 07:26:42,853 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 07:26:42,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:26:42,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:26:42,976 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 07:26:42,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 07:26:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:43,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 07:26:43,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 07:26:43,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-07 07:26:43,239 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 07:26:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-07 07:26:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:43,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:43,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:43,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976609804] [2021-11-07 07:26:43,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976609804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:43,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:43,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2021-11-07 07:26:43,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042512936] [2021-11-07 07:26:43,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:26:43,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:26:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:26:43,535 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:44,236 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2021-11-07 07:26:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:26:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-07 07:26:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:44,239 INFO L225 Difference]: With dead ends: 180 [2021-11-07 07:26:44,239 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 07:26:44,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:26:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 07:26:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2021-11-07 07:26:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 141 states have (on average 1.3333333333333333) internal successors, (188), 173 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 191 transitions. [2021-11-07 07:26:44,247 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 191 transitions. Word has length 24 [2021-11-07 07:26:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 191 transitions. [2021-11-07 07:26:44,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 191 transitions. [2021-11-07 07:26:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:26:44,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:44,249 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:26:44,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:44,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:26:44,450 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr23ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:26:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -215289779, now seen corresponding path program 1 times [2021-11-07 07:26:44,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:26:44,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030333990] [2021-11-07 07:26:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:44,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:26:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:26:44,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:26:44,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 07:26:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:26:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:44,924 INFO L354 Elim1Store]: treesize reduction 41, result has 25.5 percent of original size [2021-11-07 07:26:44,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 27 [2021-11-07 07:26:45,071 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-07 07:26:45,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 36 [2021-11-07 07:26:45,181 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-07 07:26:45,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 37 [2021-11-07 07:26:45,350 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 07:26:45,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 23 [2021-11-07 07:26:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:45,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:45,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:45,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030333990] [2021-11-07 07:26:45,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030333990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:26:45,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:26:45,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:26:45,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943915608] [2021-11-07 07:26:45,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:26:45,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:45,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:26:45,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:26:45,654 INFO L87 Difference]: Start difference. First operand 177 states and 191 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:26:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:45,969 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2021-11-07 07:26:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:26:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-07 07:26:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:45,971 INFO L225 Difference]: With dead ends: 176 [2021-11-07 07:26:45,971 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 07:26:45,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:26:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 07:26:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-07 07:26:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 171 states have internal predecessors, (185), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 188 transitions. [2021-11-07 07:26:45,979 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 188 transitions. Word has length 26 [2021-11-07 07:26:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:45,979 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 188 transitions. [2021-11-07 07:26:45,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:26:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 188 transitions. [2021-11-07 07:26:45,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 07:26:45,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:45,981 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:26:46,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 07:26:46,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:26:46,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr70REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:26:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash -310725521, now seen corresponding path program 1 times [2021-11-07 07:26:46,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:26:46,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488188839] [2021-11-07 07:26:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:46,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:26:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:26:46,198 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:26:46,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 07:26:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:26:46,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:46,662 INFO L388 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 11 treesize of output 7 [2021-11-07 07:26:46,669 INFO L388 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 11 treesize of output 7 [2021-11-07 07:26:46,712 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 07:26:46,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:26:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:46,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:26:46,835 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 07:26:46,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 07:26:46,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 07:26:46,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-07 07:26:47,184 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 07:26:47,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-07 07:26:47,195 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 07:26:47,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-11-07 07:26:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:47,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:47,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:47,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488188839] [2021-11-07 07:26:47,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488188839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:26:47,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:26:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-11-07 07:26:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156601086] [2021-11-07 07:26:47,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:26:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:26:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:26:47,575 INFO L87 Difference]: Start difference. First operand 175 states and 188 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:26:48,114 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2021-11-07 07:26:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:26:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-07 07:26:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:26:48,118 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:26:48,118 INFO L226 Difference]: Without dead ends: 182 [2021-11-07 07:26:48,118 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:26:48,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-07 07:26:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-07 07:26:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 178 states have internal predecessors, (192), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 195 transitions. [2021-11-07 07:26:48,125 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 195 transitions. Word has length 27 [2021-11-07 07:26:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:26:48,125 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 195 transitions. [2021-11-07 07:26:48,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:26:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 195 transitions. [2021-11-07 07:26:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:26:48,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:26:48,128 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:26:48,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:26:48,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:26:48,354 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr75ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:26:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:26:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1042557653, now seen corresponding path program 1 times [2021-11-07 07:26:48,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:26:48,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868597166] [2021-11-07 07:26:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:26:48,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:26:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:26:48,358 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:26:48,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 07:26:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:26:48,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:26:48,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:26:48,861 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-07 07:26:48,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 26 [2021-11-07 07:26:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:54,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:26:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:26:59,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:26:59,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868597166] [2021-11-07 07:26:59,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868597166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:26:59,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:26:59,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-11-07 07:26:59,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114015160] [2021-11-07 07:26:59,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:26:59,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:26:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:26:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=76, Unknown=3, NotChecked=0, Total=110 [2021-11-07 07:26:59,216 INFO L87 Difference]: Start difference. First operand 182 states and 195 transitions. Second operand has 11 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:27:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:27:02,412 INFO L93 Difference]: Finished difference Result 184 states and 196 transitions. [2021-11-07 07:27:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:27:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-07 07:27:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:27:02,415 INFO L225 Difference]: With dead ends: 184 [2021-11-07 07:27:02,415 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:27:02,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=46, Invalid=107, Unknown=3, NotChecked=0, Total=156 [2021-11-07 07:27:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:27:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-11-07 07:27:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 132 states have (on average 1.3333333333333333) internal successors, (176), 163 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:27:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 179 transitions. [2021-11-07 07:27:02,422 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 179 transitions. Word has length 28 [2021-11-07 07:27:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:27:02,423 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 179 transitions. [2021-11-07 07:27:02,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 07:27:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 179 transitions. [2021-11-07 07:27:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 07:27:02,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:27:02,425 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:27:02,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:27:02,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:27:02,640 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr28ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:27:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:27:02,641 INFO L85 PathProgramCache]: Analyzing trace with hash -147491882, now seen corresponding path program 1 times [2021-11-07 07:27:02,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:27:02,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625798832] [2021-11-07 07:27:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:27:02,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:27:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:27:02,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:27:02,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 07:27:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:27:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:27:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:27:03,166 INFO L388 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 [2021-11-07 07:27:03,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:27:03,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-07 07:27:03,334 INFO L388 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 20 treesize of output 16 [2021-11-07 07:27:03,517 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:27:03,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-07 07:27:03,856 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 07:27:03,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 47 [2021-11-07 07:27:04,036 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 07:27:04,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 44 [2021-11-07 07:27:04,332 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:27:04,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2021-11-07 07:27:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:27:04,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:27:19,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|main_#t~mem6.offset| (_ BitVec 32)) (v_main_~item~0.offset_56 (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base)))) (let ((.cse1 (select (select .cse0 c_main_~item~0.base) c_main_~item~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_main_~item~0.offset_56 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_56) v_DerPreprocessor_5)))) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) is different from false [2021-11-07 07:27:21,128 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|main_#t~mem6.offset| (_ BitVec 32)) (v_main_~item~0.offset_56 (_ BitVec 32))) (not (= (_ bv0 32) (select (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base))))) (let ((.cse1 (select (select .cse0 c_main_~item~0.base) c_main_~item~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_main_~item~0.offset_56 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_56) v_DerPreprocessor_5)))) c_main_~head~0.base) c_main_~head~0.offset)))) is different from false [2021-11-07 07:27:21,170 INFO L388 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 41283 treesize of output 41027 [2021-11-07 07:27:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:27:27,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:27:27,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625798832] [2021-11-07 07:27:27,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625798832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:27:27,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:27:27,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-11-07 07:27:27,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997194596] [2021-11-07 07:27:27,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:27:27,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:27:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:27:27,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=310, Unknown=7, NotChecked=74, Total=462 [2021-11-07 07:27:27,120 INFO L87 Difference]: Start difference. First operand 167 states and 179 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:27:41,972 WARN L207 SmtUtils]: Spent 6.17 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-11-07 07:27:56,236 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (main_~item~0.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_main_~item~0.base (store (store (select |c_#memory_$Pointer$.base| c_main_~item~0.base) main_~item~0.offset (_ bv0 32)) (bvadd (_ bv8 32) main_~item~0.offset) v_DerPreprocessor_5)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) (forall ((v_DerPreprocessor_5 (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_main_~item~0.base (store (select |c_#memory_$Pointer$.base| c_main_~item~0.base) (bvadd (_ bv8 32) c_main_~item~0.offset) v_DerPreprocessor_5)) c_main_~head~0.base) c_main_~head~0.offset) (_ bv0 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1)))) is different from false [2021-11-07 07:28:15,790 WARN L207 SmtUtils]: Spent 12.39 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-11-07 07:28:35,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:35,151 INFO L93 Difference]: Finished difference Result 273 states and 294 transitions. [2021-11-07 07:28:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:28:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-07 07:28:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:35,154 INFO L225 Difference]: With dead ends: 273 [2021-11-07 07:28:35,154 INFO L226 Difference]: Without dead ends: 273 [2021-11-07 07:28:35,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=217, Invalid=842, Unknown=9, NotChecked=192, Total=1260 [2021-11-07 07:28:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-07 07:28:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 181. [2021-11-07 07:28:35,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 146 states have (on average 1.3150684931506849) internal successors, (192), 177 states have internal predecessors, (192), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:28:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 195 transitions. [2021-11-07 07:28:35,163 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 195 transitions. Word has length 35 [2021-11-07 07:28:35,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:35,164 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 195 transitions. [2021-11-07 07:28:35,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:28:35,164 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 195 transitions. [2021-11-07 07:28:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:28:35,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:35,166 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:28:35,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 07:28:35,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:28:35,382 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr32ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:28:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1874601103, now seen corresponding path program 1 times [2021-11-07 07:28:35,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:28:35,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826804265] [2021-11-07 07:28:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:35,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:28:35,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:28:35,385 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:28:35,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 07:28:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:28:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:35,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:28:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:35,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:28:35,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826804265] [2021-11-07 07:28:35,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826804265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:28:35,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:28:35,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 07:28:35,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231819918] [2021-11-07 07:28:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:28:35,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:28:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:28:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:28:35,963 INFO L87 Difference]: Start difference. First operand 181 states and 195 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:28:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:28:36,001 INFO L93 Difference]: Finished difference Result 223 states and 236 transitions. [2021-11-07 07:28:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:28:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-11-07 07:28:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:28:36,003 INFO L225 Difference]: With dead ends: 223 [2021-11-07 07:28:36,003 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 07:28:36,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:28:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 07:28:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 183. [2021-11-07 07:28:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 148 states have (on average 1.2837837837837838) internal successors, (190), 179 states have internal predecessors, (190), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:28:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 193 transitions. [2021-11-07 07:28:36,011 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 193 transitions. Word has length 36 [2021-11-07 07:28:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:28:36,011 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 193 transitions. [2021-11-07 07:28:36,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:28:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 193 transitions. [2021-11-07 07:28:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 07:28:36,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:28:36,014 INFO L513 BasicCegarLoop]: 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] [2021-11-07 07:28:36,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:28:36,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:28:36,228 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr65REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 71 more)] === [2021-11-07 07:28:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:28:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1781099908, now seen corresponding path program 1 times [2021-11-07 07:28:36,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:28:36,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068343215] [2021-11-07 07:28:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:36,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:28:36,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:28:36,231 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:28:36,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 07:28:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:28:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:36,762 INFO L388 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 [2021-11-07 07:28:36,865 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 07:28:36,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-07 07:28:36,946 INFO L388 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 24 treesize of output 20 [2021-11-07 07:28:37,204 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:28:37,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-07 07:28:37,593 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 07:28:37,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 54 [2021-11-07 07:28:37,769 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 07:28:37,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 52 [2021-11-07 07:28:38,351 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:28:38,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 44 [2021-11-07 07:28:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:38,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:28:49,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (main_~item~0.offset (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) main_~item~0.offset (_ bv0 32)) (bvadd (_ bv8 32) main_~item~0.offset) v_DerPreprocessor_6)) c_main_~head~0.base) c_main_~head~0.offset)))))))))) (_ bv1 1)))) is different from false [2021-11-07 07:28:53,593 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_main_~item~0.offset_60 (_ BitVec 32)) (|main_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base)))) (let ((.cse1 (select (select .cse0 c_main_~item~0.base) c_main_~item~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_main_~item~0.offset_60 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_60) v_DerPreprocessor_6)))) c_main_~head~0.base) c_main_~head~0.offset)))))))))))) (_ bv1 1)))) is different from false [2021-11-07 07:28:55,618 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_main_~item~0.offset_60 (_ BitVec 32)) (|main_#t~mem6.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base))))) (let ((.cse1 (select (select .cse0 c_main_~item~0.base) c_main_~item~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_main_~item~0.offset_60 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_60) v_DerPreprocessor_6)))) c_main_~head~0.base) c_main_~head~0.offset))))))))))))))) is different from false [2021-11-07 07:28:55,646 INFO L388 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 5394 treesize of output 5378 [2021-11-07 07:28:55,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:28:55,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068343215] [2021-11-07 07:28:55,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 07:28:55,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1472315748] [2021-11-07 07:28:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:28:55,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 07:28:55,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 07:28:55,772 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 07:28:55,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 07:28:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:28:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:28:56,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:28:56,499 INFO L388 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 [2021-11-07 07:28:56,859 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 07:28:56,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-07 07:28:57,007 INFO L388 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 24 treesize of output 20 [2021-11-07 07:28:57,344 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:28:57,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2021-11-07 07:28:57,933 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 07:28:57,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 58 [2021-11-07 07:28:58,170 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 07:28:58,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 56 [2021-11-07 07:28:58,998 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:28:58,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2021-11-07 07:28:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:28:59,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:29:05,470 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (main_~item~0.offset (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem7.base| (store (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem7.base|) main_~item~0.offset (_ bv0 32)) (bvadd (_ bv8 32) main_~item~0.offset) v_DerPreprocessor_6)) c_main_~head~0.base) c_main_~head~0.offset)))))))))) is different from false [2021-11-07 07:29:13,290 INFO L388 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 5202 treesize of output 5186 [2021-11-07 07:29:13,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 07:29:13,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403608002] [2021-11-07 07:29:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:29:13,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:29:13,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:29:13,895 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:29:13,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a71a48d-bde4-4a52-988a-3e18ee88afd8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:29:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:29:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:29:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:29:14,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 07:29:14,534 INFO L388 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 20 treesize of output 20 [2021-11-07 07:29:14,614 INFO L388 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 16 treesize of output 12 [2021-11-07 07:29:14,829 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-07 07:29:14,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-07 07:29:15,212 INFO L354 Elim1Store]: treesize reduction 62, result has 27.1 percent of original size [2021-11-07 07:29:15,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 43 [2021-11-07 07:29:15,347 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-07 07:29:15,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 47 [2021-11-07 07:29:15,695 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 07:29:15,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-07 07:29:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:29:15,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:29:17,975 INFO L354 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2021-11-07 07:29:17,976 INFO L388 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 36 treesize of output 35 [2021-11-07 07:29:44,494 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_main_~item~0.offset_66 (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 (store (store (select |c_#memory_$Pointer$.base| .cse0) v_main_~item~0.offset_66 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_66) v_DerPreprocessor_6)) c_main_~head~0.base) c_main_~head~0.offset)))) is different from false [2021-11-07 07:29:46,531 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem6.offset| (_ BitVec 32)) (v_main_~item~0.offset_66 (_ BitVec 32))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base)))) (let ((.cse1 (select (select .cse0 c_main_~item~0.base) c_main_~item~0.offset))) (= (select (select (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_main_~item~0.offset_66 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_66) v_DerPreprocessor_6)) c_main_~head~0.base) c_main_~head~0.offset) .cse1)))) is different from false [2021-11-07 07:29:48,566 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (|main_#t~mem6.offset| (_ BitVec 32)) (v_main_~item~0.offset_66 (_ BitVec 32))) (let ((.cse0 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_main_~item~0.base) c_main_~item~0.offset))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~item~0.base))))) (let ((.cse1 (select (select .cse0 c_main_~item~0.base) c_main_~item~0.offset))) (= (select (select (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_main_~item~0.offset_66 (_ bv0 32)) (bvadd (_ bv8 32) v_main_~item~0.offset_66) v_DerPreprocessor_6)) c_main_~head~0.base) c_main_~head~0.offset) .cse1)))) is different from false [2021-11-07 07:29:48,603 INFO L388 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 44159 treesize of output 43903