./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y --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 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:03:03,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:03:03,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:03:03,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:03:03,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:03:03,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:03:03,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:03:03,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:03:03,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:03:03,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:03:03,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:03:03,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:03:03,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:03:03,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:03:03,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:03:03,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:03:03,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:03:03,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:03:03,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:03:03,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:03:03,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:03:03,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:03:03,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:03:03,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:03:03,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:03:03,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:03:03,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:03:03,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:03:03,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:03:03,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:03:03,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:03:03,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:03:03,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:03:03,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:03:03,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:03:03,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:03:03,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:03:03,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:03:03,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:03:03,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:03:03,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:03:03,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:03:03,691 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:03:03,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:03:03,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:03:03,693 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:03:03,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:03:03,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:03:03,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:03:03,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:03:03,703 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:03:03,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:03:03,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:03:03,704 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:03:03,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:03:03,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:03:03,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:03:03,707 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:03:03,707 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:03:03,708 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:03:03,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:03:03,708 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:03:03,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:03:03,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:03:03,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:03:03,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:03:03,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:03:03,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:03,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:03:03,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:03:03,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:03:03,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:03:03,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:03:03,714 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_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb [2021-11-13 18:03:04,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:03:04,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:03:04,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:03:04,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:03:04,041 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:03:04,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-11-13 18:03:04,111 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/3a4206d4a/7af892628f5345d0ac79be3e1c4614c1/FLAGec0d9b208 [2021-11-13 18:03:04,771 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:03:04,772 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-11-13 18:03:04,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/3a4206d4a/7af892628f5345d0ac79be3e1c4614c1/FLAGec0d9b208 [2021-11-13 18:03:05,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/3a4206d4a/7af892628f5345d0ac79be3e1c4614c1 [2021-11-13 18:03:05,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:03:05,023 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:03:05,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:05,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:03:05,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:03:05,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd80bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05, skipping insertion in model container [2021-11-13 18:03:05,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:03:05,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:05,504 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_e928af37-6bd9-4923-b159-9c79b09dca83/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-11-13 18:03:05,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:05,519 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:03:05,564 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_e928af37-6bd9-4923-b159-9c79b09dca83/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-11-13 18:03:05,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:05,600 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:03:05,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05 WrapperNode [2021-11-13 18:03:05,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:05,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:03:05,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:03:05,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:03:05,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:03:05,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:03:05,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:03:05,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:03:05,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (1/1) ... [2021-11-13 18:03:05,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:05,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:05,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:03:05,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:03:05,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:03:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:03:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:03:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:03:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:03:05,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 18:03:05,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 18:03:05,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 18:03:05,777 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 18:03:05,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:03:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:03:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:03:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:03:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:03:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:03:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:03:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 18:03:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2021-11-13 18:03:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:03:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:03:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:03:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:03:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:03:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:03:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:03:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:03:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:03:05,780 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:03:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:03:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:03:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:03:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:03:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 18:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 18:03:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 18:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:03:05,783 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:03:05,784 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:03:05,785 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:03:05,785 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:03:05,785 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:03:05,785 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:03:05,785 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:03:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:03:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:03:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:03:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:03:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:03:05,786 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:03:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:03:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:03:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:03:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:03:05,787 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:03:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:03:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:03:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:03:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:03:05,788 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:03:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:03:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:03:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:03:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:03:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:03:05,789 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:03:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:03:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:03:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:03:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:03:05,790 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:03:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:03:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:03:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:03:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:03:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:03:05,791 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:03:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:03:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:03:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:03:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:03:05,792 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:03:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:03:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:03:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:03:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:03:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:03:05,793 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:03:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:03:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:03:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:03:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:03:05,794 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:03:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:03:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:03:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:03:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:03:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:03:05,795 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:03:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:03:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:03:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:03:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:03:05,796 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:03:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:03:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:03:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:03:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:03:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:03:05,797 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:03:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:03:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:03:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:03:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 18:03:05,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:03:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:03:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:03:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:03:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:03:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:03:05,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:03:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:03:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:03:05,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:03:06,166 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 18:03:06,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:03:06,487 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-13 18:03:06,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:06 BoogieIcfgContainer [2021-11-13 18:03:06,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:03:06,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:03:06,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:03:06,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:03:06,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:03:05" (1/3) ... [2021-11-13 18:03:06,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8ea89c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:06, skipping insertion in model container [2021-11-13 18:03:06,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:05" (2/3) ... [2021-11-13 18:03:06,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8ea89c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:06, skipping insertion in model container [2021-11-13 18:03:06,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:06" (3/3) ... [2021-11-13 18:03:06,499 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_2.i [2021-11-13 18:03:06,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:03:06,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-11-13 18:03:06,555 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:03:06,562 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 [2021-11-13 18:03:06,563 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-11-13 18:03:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:03:06,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:03:06,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:06,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:06,592 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -234092837, now seen corresponding path program 1 times [2021-11-13 18:03:06,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:06,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893752772] [2021-11-13 18:03:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:06,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:06,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:06,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893752772] [2021-11-13 18:03:06,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893752772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:06,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:06,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:03:06,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469877096] [2021-11-13 18:03:06,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:06,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:03:06,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:06,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:03:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:03:06,924 INFO L87 Difference]: Start difference. First operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-13 18:03:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:07,116 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-13 18:03:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:03:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 11 [2021-11-13 18:03:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:07,127 INFO L225 Difference]: With dead ends: 98 [2021-11-13 18:03:07,127 INFO L226 Difference]: Without dead ends: 90 [2021-11-13 18:03:07,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:03:07,134 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.25ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:07,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 109 Invalid, 102 Unknown, 0 Unchecked, 6.25ms Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 148.31ms Time] [2021-11-13 18:03:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-13 18:03:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-13 18:03:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 86 states have internal predecessors, (93), 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) [2021-11-13 18:03:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-11-13 18:03:07,179 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 11 [2021-11-13 18:03:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-11-13 18:03:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-11-13 18:03:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-11-13 18:03:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:03:07,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:07,182 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:07,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:03:07,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1332069837, now seen corresponding path program 1 times [2021-11-13 18:03:07,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:07,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970077438] [2021-11-13 18:03:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:07,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:07,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:07,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970077438] [2021-11-13 18:03:07,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970077438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:07,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:07,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:03:07,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204370651] [2021-11-13 18:03:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:07,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:03:07,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:03:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:03:07,307 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-13 18:03:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:07,630 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-11-13 18:03:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:03:07,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-11-13 18:03:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:07,637 INFO L225 Difference]: With dead ends: 111 [2021-11-13 18:03:07,637 INFO L226 Difference]: Without dead ends: 111 [2021-11-13 18:03:07,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:03:07,644 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 225.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.84ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 268.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:07,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 64 Invalid, 198 Unknown, 0 Unchecked, 8.84ms Time], IncrementalHoareTripleChecker [34 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 268.54ms Time] [2021-11-13 18:03:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-13 18:03:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-11-13 18:03:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 87 states have internal predecessors, (104), 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) [2021-11-13 18:03:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-11-13 18:03:07,671 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2021-11-13 18:03:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:07,672 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-11-13 18:03:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-13 18:03:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-11-13 18:03:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:03:07,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:07,674 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:07,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:03:07,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:07,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1332069838, now seen corresponding path program 1 times [2021-11-13 18:03:07,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:07,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147127872] [2021-11-13 18:03:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:07,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:07,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:07,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:07,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147127872] [2021-11-13 18:03:07,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147127872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:07,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:07,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:03:07,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093228938] [2021-11-13 18:03:07,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:07,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:03:07,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:03:07,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:03:07,875 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-13 18:03:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:08,176 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-11-13 18:03:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:03:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-11-13 18:03:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:08,181 INFO L225 Difference]: With dead ends: 128 [2021-11-13 18:03:08,181 INFO L226 Difference]: Without dead ends: 128 [2021-11-13 18:03:08,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:03:08,185 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 167 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 201.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.48ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 263.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:08,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 72 Invalid, 213 Unknown, 0 Unchecked, 5.48ms Time], IncrementalHoareTripleChecker [30 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 263.10ms Time] [2021-11-13 18:03:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-13 18:03:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-11-13 18:03:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 107 states have internal predecessors, (122), 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) [2021-11-13 18:03:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-11-13 18:03:08,203 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 12 [2021-11-13 18:03:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:08,204 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-11-13 18:03:08,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-13 18:03:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-11-13 18:03:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:03:08,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:08,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:08,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:03:08,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash 296118254, now seen corresponding path program 1 times [2021-11-13 18:03:08,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:08,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845423991] [2021-11-13 18:03:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:08,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:08,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:08,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:08,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845423991] [2021-11-13 18:03:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845423991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:08,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:08,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:03:08,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930959789] [2021-11-13 18:03:08,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:08,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:03:08,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:03:08,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:03:08,397 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-13 18:03:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:08,760 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2021-11-13 18:03:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:03:08,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-11-13 18:03:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:08,762 INFO L225 Difference]: With dead ends: 156 [2021-11-13 18:03:08,763 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 18:03:08,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:03:08,764 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 115 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 252.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 303.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:08,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 260 Invalid, 434 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [14 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 303.09ms Time] [2021-11-13 18:03:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 18:03:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 115. [2021-11-13 18:03:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 111 states have internal predecessors, (130), 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) [2021-11-13 18:03:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-11-13 18:03:08,773 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 21 [2021-11-13 18:03:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:08,774 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-11-13 18:03:08,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-13 18:03:08,774 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-11-13 18:03:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:03:08,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:08,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:08,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:03:08,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 296118255, now seen corresponding path program 1 times [2021-11-13 18:03:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:08,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406557779] [2021-11-13 18:03:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:08,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:08,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:08,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:08,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406557779] [2021-11-13 18:03:08,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406557779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:08,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:08,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:03:08,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129261210] [2021-11-13 18:03:08,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:08,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:03:08,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:03:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:03:08,978 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-13 18:03:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:09,406 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2021-11-13 18:03:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:03:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-11-13 18:03:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:09,407 INFO L225 Difference]: With dead ends: 159 [2021-11-13 18:03:09,408 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 18:03:09,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:03:09,409 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 79 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.02ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:09,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 327 Invalid, 454 Unknown, 0 Unchecked, 6.02ms Time], IncrementalHoareTripleChecker [13 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 335.97ms Time] [2021-11-13 18:03:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 18:03:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2021-11-13 18:03:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 95 states have internal predecessors, (108), 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) [2021-11-13 18:03:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-11-13 18:03:09,417 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 21 [2021-11-13 18:03:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:09,417 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-11-13 18:03:09,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-11-13 18:03:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-11-13 18:03:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:03:09,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:09,419 INFO L514 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] [2021-11-13 18:03:09,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:03:09,419 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1432577259, now seen corresponding path program 1 times [2021-11-13 18:03:09,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:09,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996808062] [2021-11-13 18:03:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:09,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:09,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:09,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996808062] [2021-11-13 18:03:09,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996808062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:09,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:09,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:03:09,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462515312] [2021-11-13 18:03:09,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:09,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:03:09,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:09,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:03:09,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:03:09,540 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-11-13 18:03:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:09,785 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-11-13 18:03:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:03:09,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22 [2021-11-13 18:03:09,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:09,787 INFO L225 Difference]: With dead ends: 191 [2021-11-13 18:03:09,787 INFO L226 Difference]: Without dead ends: 191 [2021-11-13 18:03:09,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:03:09,789 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 163 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.12ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:09,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 224 Invalid, 301 Unknown, 0 Unchecked, 5.12ms Time], IncrementalHoareTripleChecker [26 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 216.65ms Time] [2021-11-13 18:03:09,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-13 18:03:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-11-13 18:03:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 106 states have internal predecessors, (123), 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) [2021-11-13 18:03:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-11-13 18:03:09,797 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 22 [2021-11-13 18:03:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:09,797 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-11-13 18:03:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-11-13 18:03:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-11-13 18:03:09,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:03:09,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:09,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:09,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:03:09,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:09,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:09,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1350239013, now seen corresponding path program 1 times [2021-11-13 18:03:09,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:09,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124482112] [2021-11-13 18:03:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:09,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:09,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:09,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:09,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124482112] [2021-11-13 18:03:09,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124482112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:09,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:09,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:03:09,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938056236] [2021-11-13 18:03:09,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:09,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:03:09,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:09,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:03:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:03:09,928 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-13 18:03:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:10,209 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2021-11-13 18:03:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:03:10,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 24 [2021-11-13 18:03:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:10,211 INFO L225 Difference]: With dead ends: 138 [2021-11-13 18:03:10,211 INFO L226 Difference]: Without dead ends: 138 [2021-11-13 18:03:10,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:03:10,213 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 108 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 196.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.87ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 237.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:10,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 235 Invalid, 366 Unknown, 0 Unchecked, 4.87ms Time], IncrementalHoareTripleChecker [13 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 237.77ms Time] [2021-11-13 18:03:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-13 18:03:10,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-11-13 18:03:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 104 states have internal predecessors, (121), 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) [2021-11-13 18:03:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-11-13 18:03:10,219 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 24 [2021-11-13 18:03:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:10,219 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-11-13 18:03:10,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-13 18:03:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-11-13 18:03:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:03:10,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:10,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:10,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:03:10,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1350239012, now seen corresponding path program 1 times [2021-11-13 18:03:10,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:10,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928944115] [2021-11-13 18:03:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:10,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:10,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:03:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:10,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:10,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928944115] [2021-11-13 18:03:10,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928944115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:10,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:10,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:03:10,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497828212] [2021-11-13 18:03:10,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:10,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:03:10,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:10,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:03:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:03:10,341 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-13 18:03:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:10,713 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-11-13 18:03:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:03:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 24 [2021-11-13 18:03:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:10,715 INFO L225 Difference]: With dead ends: 136 [2021-11-13 18:03:10,715 INFO L226 Difference]: Without dead ends: 136 [2021-11-13 18:03:10,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:03:10,716 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 71 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:10,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 295 Invalid, 363 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [9 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 266.17ms Time] [2021-11-13 18:03:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-13 18:03:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-11-13 18:03:10,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 89 states have internal predecessors, (104), 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) [2021-11-13 18:03:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-11-13 18:03:10,722 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2021-11-13 18:03:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:10,723 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-11-13 18:03:10,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-11-13 18:03:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-11-13 18:03:10,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:03:10,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:10,725 INFO L514 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] [2021-11-13 18:03:10,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:03:10,725 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2025386131, now seen corresponding path program 1 times [2021-11-13 18:03:10,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:10,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736906038] [2021-11-13 18:03:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:10,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:03:10,745 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:03:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:03:10,785 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:03:10,786 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:03:10,787 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK (37 of 38 remaining) [2021-11-13 18:03:10,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (36 of 38 remaining) [2021-11-13 18:03:10,789 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (35 of 38 remaining) [2021-11-13 18:03:10,789 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (34 of 38 remaining) [2021-11-13 18:03:10,789 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (33 of 38 remaining) [2021-11-13 18:03:10,789 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (32 of 38 remaining) [2021-11-13 18:03:10,789 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (31 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (30 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (29 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (28 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (27 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (26 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (25 of 38 remaining) [2021-11-13 18:03:10,790 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (24 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (23 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (22 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (21 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (20 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (19 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (18 of 38 remaining) [2021-11-13 18:03:10,791 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (17 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (16 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (15 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (14 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (13 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (12 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (11 of 38 remaining) [2021-11-13 18:03:10,792 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (10 of 38 remaining) [2021-11-13 18:03:10,793 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (9 of 38 remaining) [2021-11-13 18:03:10,793 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (8 of 38 remaining) [2021-11-13 18:03:10,793 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION (7 of 38 remaining) [2021-11-13 18:03:10,793 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE (6 of 38 remaining) [2021-11-13 18:03:10,793 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE (5 of 38 remaining) [2021-11-13 18:03:10,793 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE (4 of 38 remaining) [2021-11-13 18:03:10,794 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE (3 of 38 remaining) [2021-11-13 18:03:10,794 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE (2 of 38 remaining) [2021-11-13 18:03:10,794 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE (1 of 38 remaining) [2021-11-13 18:03:10,794 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK (0 of 38 remaining) [2021-11-13 18:03:10,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:03:10,798 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:10,801 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:03:10,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:03:10 BoogieIcfgContainer [2021-11-13 18:03:10,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:03:10,827 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:03:10,828 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:03:10,828 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:03:10,828 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:06" (3/4) ... [2021-11-13 18:03:10,831 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 18:03:10,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:03:10,832 INFO L158 Benchmark]: Toolchain (without parser) took 5809.37ms. Allocated memory was 100.7MB in the beginning and 146.8MB in the end (delta: 46.1MB). Free memory was 68.7MB in the beginning and 86.7MB in the end (delta: -18.0MB). Peak memory consumption was 27.7MB. Max. memory is 16.1GB. [2021-11-13 18:03:10,832 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:03:10,833 INFO L158 Benchmark]: CACSL2BoogieTranslator took 576.64ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 68.5MB in the end (delta: -78.9kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:03:10,833 INFO L158 Benchmark]: Boogie Preprocessor took 83.60ms. Allocated memory is still 100.7MB. Free memory was 68.5MB in the beginning and 65.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:03:10,834 INFO L158 Benchmark]: RCFGBuilder took 803.54ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 65.9MB in the beginning and 95.5MB in the end (delta: -29.6MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2021-11-13 18:03:10,834 INFO L158 Benchmark]: TraceAbstraction took 4335.04ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 94.9MB in the beginning and 86.7MB in the end (delta: 8.2MB). Peak memory consumption was 32.6MB. Max. memory is 16.1GB. [2021-11-13 18:03:10,834 INFO L158 Benchmark]: Witness Printer took 4.12ms. Allocated memory is still 146.8MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:03:10,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 100.7MB. Free memory was 56.6MB in the beginning and 56.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 576.64ms. Allocated memory is still 100.7MB. Free memory was 68.4MB in the beginning and 68.5MB in the end (delta: -78.9kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.60ms. Allocated memory is still 100.7MB. Free memory was 68.5MB in the beginning and 65.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 803.54ms. Allocated memory was 100.7MB in the beginning and 121.6MB in the end (delta: 21.0MB). Free memory was 65.9MB in the beginning and 95.5MB in the end (delta: -29.6MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4335.04ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 94.9MB in the beginning and 86.7MB in the end (delta: 8.2MB). Peak memory consumption was 32.6MB. Max. memory is 16.1GB. * Witness Printer took 4.12ms. Allocated memory is still 146.8MB. Free memory is still 86.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 569]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 569. Possible FailurePath: [L533] int i = 0; [L534] int y = 0; [L535] List a = (List) malloc(sizeof(struct node)); [L536] COND FALSE !(a == 0) VAL [a={-1:0}, i=0, y=0] [L537] List t; [L538] List p = a; VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L539] i < 10 && __VERIFIER_nondet_int() [L539] i < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, i < 10 && __VERIFIER_nondet_int()=0, p={-1:0}, y=0] [L539] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L547] y < 10 && __VERIFIER_nondet_int() [L547] y < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, p={-1:0}, y=0, y < 10 && __VERIFIER_nondet_int()=0] [L547] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L555] p->h = 3 VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L556] p->n = (void*)__VERIFIER_nondet_ulong() VAL [__VERIFIER_nondet_ulong()=0, a={-1:0}, i=0, p={-1:0}, y=0] [L557] i = 0 [L558] y = 0 [L559] p = a VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L560] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L560] COND FALSE !(p->h == 1) [L564] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L564] COND FALSE !(p->h == 2) [L568] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L568] COND TRUE p->h != 3 || (i + y) < 20 [L569] reach_error() VAL [a={-1:0}, i=0, p={-1:0}, y=0] - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 117 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 865 SdHoareTripleChecker+Valid, 2039.59ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 865 mSDsluCounter, 1586 SdHoareTripleChecker+Invalid, 1667.57ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1008 mSDsCounter, 143 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2288 IncrementalHoareTripleChecker+Invalid, 2431 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 143 mSolverCounterUnsat, 578 mSDtfsCounter, 2288 mSolverCounterSat, 46.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=4, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 292 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 17/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-13 18:03:10,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/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_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y --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 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:03:13,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:03:13,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:03:13,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:03:13,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:03:13,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:03:13,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:03:13,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:03:13,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:03:13,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:03:13,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:03:13,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:03:13,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:03:13,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:03:13,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:03:13,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:03:13,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:03:13,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:03:13,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:03:13,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:03:13,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:03:13,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:03:13,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:03:13,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:03:13,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:03:13,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:03:13,449 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:03:13,451 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:03:13,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:03:13,453 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:03:13,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:03:13,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:03:13,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:03:13,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:03:13,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:03:13,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:03:13,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:03:13,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:03:13,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:03:13,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:03:13,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:03:13,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-13 18:03:13,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:03:13,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:03:13,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:03:13,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:03:13,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:03:13,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:03:13,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:03:13,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:03:13,510 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:03:13,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:03:13,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:03:13,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:03:13,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:03:13,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:03:13,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:03:13,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:03:13,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:03:13,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:03:13,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:03:13,513 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:03:13,514 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:03:13,514 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:03:13,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:03:13,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:03:13,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:03:13,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:03:13,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:03:13,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:13,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:03:13,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:03:13,516 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:03:13,516 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:03:13,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:03:13,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:03:13,517 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_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8708d72a830c5b897b9a667c6367e709c7302fa81ab6e6c80a90a68a6807b5fb [2021-11-13 18:03:13,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:03:13,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:03:13,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:03:13,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:03:13,922 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:03:13,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-11-13 18:03:13,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/b25a5eac4/c8fff96333a84dd1b4f726a8b97a615a/FLAGb8b5c4f17 [2021-11-13 18:03:14,646 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:03:14,647 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-11-13 18:03:14,677 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/b25a5eac4/c8fff96333a84dd1b4f726a8b97a615a/FLAGb8b5c4f17 [2021-11-13 18:03:14,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/data/b25a5eac4/c8fff96333a84dd1b4f726a8b97a615a [2021-11-13 18:03:14,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:03:14,934 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:03:14,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:14,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:03:14,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:03:14,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:14" (1/1) ... [2021-11-13 18:03:14,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a716a7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:14, skipping insertion in model container [2021-11-13 18:03:14,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:14" (1/1) ... [2021-11-13 18:03:14,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:03:14,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:15,377 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_e928af37-6bd9-4923-b159-9c79b09dca83/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-11-13 18:03:15,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:15,398 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:03:15,445 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_e928af37-6bd9-4923-b159-9c79b09dca83/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-11-13 18:03:15,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:15,485 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:03:15,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15 WrapperNode [2021-11-13 18:03:15,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:15,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:03:15,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:03:15,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:03:15,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:03:15,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:03:15,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:03:15,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:03:15,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (1/1) ... [2021-11-13 18:03:15,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:15,667 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:03:15,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:03:15,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:03:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:03:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-13 18:03:15,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:03:15,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:03:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:03:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 18:03:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 18:03:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 18:03:15,727 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 18:03:15,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:03:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:03:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:03:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:03:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:03:15,728 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:03:15,729 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:03:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:03:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:03:15,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:03:15,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:03:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:03:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:03:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:03:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:03:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 18:03:15,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 18:03:15,733 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 18:03:15,733 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:03:15,733 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:03:15,734 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:03:15,734 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:03:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:03:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:03:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:03:15,735 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:03:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:03:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:03:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:03:15,736 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:03:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:03:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:03:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:03:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:03:15,737 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:03:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:03:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:03:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:03:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:03:15,740 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:03:15,740 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:03:15,740 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:03:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:03:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:03:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:03:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:03:15,741 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:03:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:03:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:03:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:03:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:03:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:03:15,742 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:03:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:03:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:03:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:03:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:03:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:03:15,743 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:03:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:03:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:03:15,744 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:03:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:03:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:03:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:03:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:03:15,745 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:03:15,746 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:03:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:03:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:03:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:03:15,747 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:03:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:03:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:03:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:03:15,748 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:03:15,749 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:03:15,750 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:03:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:03:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:03:15,751 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:03:15,752 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:03:15,753 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:03:15,755 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:03:15,756 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:03:15,756 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 18:03:15,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:03:15,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:03:15,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:03:15,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:03:15,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:03:15,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:03:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:03:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:03:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:03:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:03:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-13 18:03:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:03:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:03:16,235 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 18:03:16,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:03:16,700 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-13 18:03:16,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:16 BoogieIcfgContainer [2021-11-13 18:03:16,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:03:16,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:03:16,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:03:16,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:03:16,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:03:14" (1/3) ... [2021-11-13 18:03:16,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c429391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:16, skipping insertion in model container [2021-11-13 18:03:16,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:15" (2/3) ... [2021-11-13 18:03:16,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c429391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:16, skipping insertion in model container [2021-11-13 18:03:16,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:16" (3/3) ... [2021-11-13 18:03:16,710 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_2.i [2021-11-13 18:03:16,716 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:03:16,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-11-13 18:03:16,764 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:03:16,774 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 [2021-11-13 18:03:16,780 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-11-13 18:03:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:03:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:03:16,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:16,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:16,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1300184920, now seen corresponding path program 1 times [2021-11-13 18:03:16,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:16,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776573797] [2021-11-13 18:03:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:16,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:16,892 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:16,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:03:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:03:17,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:17,151 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 [2021-11-13 18:03:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:17,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:17,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:17,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776573797] [2021-11-13 18:03:17,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776573797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:17,319 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:17,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:03:17,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662844651] [2021-11-13 18:03:17,323 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:17,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:03:17,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:17,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:03:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:03:17,368 INFO L87 Difference]: Start difference. First operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 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 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-13 18:03:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:17,908 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-13 18:03:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:03:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 10 [2021-11-13 18:03:17,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:17,934 INFO L225 Difference]: With dead ends: 111 [2021-11-13 18:03:17,934 INFO L226 Difference]: Without dead ends: 103 [2021-11-13 18:03:17,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:03:17,941 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 480.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:17,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 70 Invalid, 124 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [33 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 480.47ms Time] [2021-11-13 18:03:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-13 18:03:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-11-13 18:03:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 79 states have internal predecessors, (92), 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) [2021-11-13 18:03:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2021-11-13 18:03:17,996 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 10 [2021-11-13 18:03:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:17,997 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2021-11-13 18:03:17,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-13 18:03:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2021-11-13 18:03:17,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:03:17,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:17,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:18,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:18,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:18,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1300184921, now seen corresponding path program 1 times [2021-11-13 18:03:18,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:18,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942589720] [2021-11-13 18:03:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:18,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:18,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:18,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:03:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:03:18,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:18,377 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 [2021-11-13 18:03:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:18,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:18,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:18,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942589720] [2021-11-13 18:03:18,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942589720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:18,654 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:18,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-13 18:03:18,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593112316] [2021-11-13 18:03:18,655 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:18,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:03:18,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:03:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:03:18,658 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-11-13 18:03:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:19,364 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-11-13 18:03:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:03:19,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 10 [2021-11-13 18:03:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:19,367 INFO L225 Difference]: With dead ends: 119 [2021-11-13 18:03:19,367 INFO L226 Difference]: Without dead ends: 119 [2021-11-13 18:03:19,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:03:19,369 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 275 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 525.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.13ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 624.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:19,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 74 Invalid, 187 Unknown, 0 Unchecked, 6.13ms Time], IncrementalHoareTripleChecker [47 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 624.36ms Time] [2021-11-13 18:03:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-13 18:03:19,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-11-13 18:03:19,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 97 states have internal predecessors, (107), 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) [2021-11-13 18:03:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-11-13 18:03:19,382 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 10 [2021-11-13 18:03:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:19,383 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-11-13 18:03:19,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2021-11-13 18:03:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-11-13 18:03:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:03:19,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:19,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:19,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 18:03:19,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:19,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1952159409, now seen corresponding path program 1 times [2021-11-13 18:03:19,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:19,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616065349] [2021-11-13 18:03:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:19,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:19,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:19,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:03:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:03:19,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:19,755 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 [2021-11-13 18:03:19,780 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 23 treesize of output 19 [2021-11-13 18:03:19,807 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 25 treesize of output 13 [2021-11-13 18:03:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:19,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:19,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:19,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616065349] [2021-11-13 18:03:19,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616065349] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:19,921 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:19,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:03:19,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123424082] [2021-11-13 18:03:19,922 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:19,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:03:19,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:03:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:03:19,924 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-13 18:03:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:20,607 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-11-13 18:03:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:03:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 17 [2021-11-13 18:03:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:20,612 INFO L225 Difference]: With dead ends: 140 [2021-11-13 18:03:20,612 INFO L226 Difference]: Without dead ends: 140 [2021-11-13 18:03:20,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:03:20,614 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 102 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 520.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.56ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 610.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:20,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 200 Invalid, 278 Unknown, 0 Unchecked, 5.56ms Time], IncrementalHoareTripleChecker [13 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 610.87ms Time] [2021-11-13 18:03:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-13 18:03:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-11-13 18:03:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 99 states have internal predecessors, (112), 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) [2021-11-13 18:03:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-11-13 18:03:20,625 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 17 [2021-11-13 18:03:20,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:20,626 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-11-13 18:03:20,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-13 18:03:20,626 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-11-13 18:03:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:03:20,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:20,628 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:20,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:20,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:20,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1952159408, now seen corresponding path program 1 times [2021-11-13 18:03:20,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:20,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049748103] [2021-11-13 18:03:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:20,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:20,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:03:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:03:20,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:21,017 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 [2021-11-13 18:03:21,056 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 13 treesize of output 9 [2021-11-13 18:03:21,065 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 19 treesize of output 15 [2021-11-13 18:03:21,108 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 39 treesize of output 27 [2021-11-13 18:03:21,120 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 24 treesize of output 12 [2021-11-13 18:03:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:21,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:21,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:21,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049748103] [2021-11-13 18:03:21,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049748103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:21,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:21,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-13 18:03:21,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239849470] [2021-11-13 18:03:21,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:21,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:03:21,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:03:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:03:21,570 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 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) [2021-11-13 18:03:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:23,275 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2021-11-13 18:03:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:03:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 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 17 [2021-11-13 18:03:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:23,278 INFO L225 Difference]: With dead ends: 145 [2021-11-13 18:03:23,278 INFO L226 Difference]: Without dead ends: 145 [2021-11-13 18:03:23,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:03:23,280 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 149 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1300.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.32ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1469.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 327 Invalid, 377 Unknown, 0 Unchecked, 6.32ms Time], IncrementalHoareTripleChecker [22 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 1469.93ms Time] [2021-11-13 18:03:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-13 18:03:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2021-11-13 18:03:23,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 87 states have internal predecessors, (96), 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) [2021-11-13 18:03:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-13 18:03:23,290 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 17 [2021-11-13 18:03:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:23,290 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-13 18:03:23,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 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) [2021-11-13 18:03:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-13 18:03:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:03:23,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:23,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:23,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:23,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:23,519 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:23,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2002045966, now seen corresponding path program 1 times [2021-11-13 18:03:23,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:23,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151879922] [2021-11-13 18:03:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:23,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:23,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:23,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:23,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:03:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:03:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:23,718 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 [2021-11-13 18:03:23,762 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-13 18:03:23,762 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 27 treesize of output 11 [2021-11-13 18:03:23,789 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 15 treesize of output 7 [2021-11-13 18:03:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:23,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:23,932 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 148 treesize of output 140 [2021-11-13 18:03:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:24,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:24,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151879922] [2021-11-13 18:03:24,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151879922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:24,070 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:24,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-13 18:03:24,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751969974] [2021-11-13 18:03:24,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:24,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:03:24,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:03:24,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:03:24,071 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2021-11-13 18:03:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:24,714 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2021-11-13 18:03:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:03:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 18 [2021-11-13 18:03:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:24,717 INFO L225 Difference]: With dead ends: 192 [2021-11-13 18:03:24,717 INFO L226 Difference]: Without dead ends: 192 [2021-11-13 18:03:24,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:03:24,718 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 212 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 447.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.80ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 535.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:24,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 252 Invalid, 313 Unknown, 0 Unchecked, 4.80ms Time], IncrementalHoareTripleChecker [42 Valid, 234 Invalid, 0 Unknown, 37 Unchecked, 535.13ms Time] [2021-11-13 18:03:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-13 18:03:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 98. [2021-11-13 18:03:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 94 states have internal predecessors, (105), 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) [2021-11-13 18:03:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-11-13 18:03:24,727 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 18 [2021-11-13 18:03:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:24,728 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-11-13 18:03:24,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2021-11-13 18:03:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-11-13 18:03:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:03:24,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:24,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:24,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-13 18:03:24,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:24,941 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1259494057, now seen corresponding path program 1 times [2021-11-13 18:03:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:24,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806165399] [2021-11-13 18:03:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:24,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:24,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:24,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:03:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:25,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:03:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:25,086 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 [2021-11-13 18:03:25,122 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 19 treesize of output 15 [2021-11-13 18:03:25,131 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 13 treesize of output 9 [2021-11-13 18:03:25,171 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 39 treesize of output 27 [2021-11-13 18:03:25,174 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 24 treesize of output 12 [2021-11-13 18:03:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:25,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:25,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:25,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806165399] [2021-11-13 18:03:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806165399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:25,559 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:25,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-13 18:03:25,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104367080] [2021-11-13 18:03:25,559 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:25,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:03:25,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:03:25,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:03:25,561 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-13 18:03:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:27,210 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-11-13 18:03:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:03:27,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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 18 [2021-11-13 18:03:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:27,212 INFO L225 Difference]: With dead ends: 124 [2021-11-13 18:03:27,212 INFO L226 Difference]: Without dead ends: 124 [2021-11-13 18:03:27,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:03:27,213 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 85 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1283.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1449.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:27,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 360 Invalid, 389 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [14 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 1449.05ms Time] [2021-11-13 18:03:27,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-13 18:03:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-11-13 18:03:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 84 states have internal predecessors, (95), 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) [2021-11-13 18:03:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-11-13 18:03:27,222 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 18 [2021-11-13 18:03:27,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:27,222 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-11-13 18:03:27,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 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) [2021-11-13 18:03:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-11-13 18:03:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:03:27,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:27,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:27,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:27,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:27,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:27,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1259494058, now seen corresponding path program 1 times [2021-11-13 18:03:27,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:27,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261886488] [2021-11-13 18:03:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:27,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:27,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:27,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:03:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:03:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:27,563 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 [2021-11-13 18:03:27,581 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 23 treesize of output 19 [2021-11-13 18:03:27,602 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 25 treesize of output 13 [2021-11-13 18:03:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:27,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:27,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:27,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261886488] [2021-11-13 18:03:27,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261886488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:27,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:27,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:03:27,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038688738] [2021-11-13 18:03:27,715 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:27,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:03:27,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:03:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:03:27,717 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-11-13 18:03:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:28,210 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2021-11-13 18:03:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:03:28,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 18 [2021-11-13 18:03:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:28,212 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:03:28,212 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 18:03:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:03:28,214 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 84 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 378.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 438.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:28,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 181 Invalid, 221 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [12 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 438.79ms Time] [2021-11-13 18:03:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 18:03:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2021-11-13 18:03:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 79 states have internal predecessors, (89), 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) [2021-11-13 18:03:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-11-13 18:03:28,221 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 18 [2021-11-13 18:03:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:28,221 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-11-13 18:03:28,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-11-13 18:03:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-11-13 18:03:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:03:28,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:28,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:28,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:28,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:28,437 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-11-13 18:03:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash 131545524, now seen corresponding path program 1 times [2021-11-13 18:03:28,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:28,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073431775] [2021-11-13 18:03:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:28,439 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:28,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:28,440 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:28,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:03:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:03:28,573 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:03:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:03:28,663 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:03:28,663 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:03:28,664 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK (37 of 38 remaining) [2021-11-13 18:03:28,666 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (36 of 38 remaining) [2021-11-13 18:03:28,667 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (35 of 38 remaining) [2021-11-13 18:03:28,667 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (34 of 38 remaining) [2021-11-13 18:03:28,667 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (33 of 38 remaining) [2021-11-13 18:03:28,667 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (32 of 38 remaining) [2021-11-13 18:03:28,668 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (31 of 38 remaining) [2021-11-13 18:03:28,668 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (30 of 38 remaining) [2021-11-13 18:03:28,668 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (29 of 38 remaining) [2021-11-13 18:03:28,668 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (28 of 38 remaining) [2021-11-13 18:03:28,668 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION (27 of 38 remaining) [2021-11-13 18:03:28,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (26 of 38 remaining) [2021-11-13 18:03:28,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (25 of 38 remaining) [2021-11-13 18:03:28,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (24 of 38 remaining) [2021-11-13 18:03:28,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (23 of 38 remaining) [2021-11-13 18:03:28,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (22 of 38 remaining) [2021-11-13 18:03:28,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (21 of 38 remaining) [2021-11-13 18:03:28,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (20 of 38 remaining) [2021-11-13 18:03:28,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (19 of 38 remaining) [2021-11-13 18:03:28,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (18 of 38 remaining) [2021-11-13 18:03:28,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (17 of 38 remaining) [2021-11-13 18:03:28,671 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (16 of 38 remaining) [2021-11-13 18:03:28,671 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (15 of 38 remaining) [2021-11-13 18:03:28,671 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION (14 of 38 remaining) [2021-11-13 18:03:28,671 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION (13 of 38 remaining) [2021-11-13 18:03:28,672 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION (12 of 38 remaining) [2021-11-13 18:03:28,672 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION (11 of 38 remaining) [2021-11-13 18:03:28,672 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION (10 of 38 remaining) [2021-11-13 18:03:28,672 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION (9 of 38 remaining) [2021-11-13 18:03:28,672 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION (8 of 38 remaining) [2021-11-13 18:03:28,673 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION (7 of 38 remaining) [2021-11-13 18:03:28,673 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE (6 of 38 remaining) [2021-11-13 18:03:28,673 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE (5 of 38 remaining) [2021-11-13 18:03:28,674 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE (4 of 38 remaining) [2021-11-13 18:03:28,674 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE (3 of 38 remaining) [2021-11-13 18:03:28,674 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE (2 of 38 remaining) [2021-11-13 18:03:28,674 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE (1 of 38 remaining) [2021-11-13 18:03:28,675 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK (0 of 38 remaining) [2021-11-13 18:03:28,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:28,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:28,889 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:28,892 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:03:28,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:03:28 BoogieIcfgContainer [2021-11-13 18:03:28,921 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:03:28,922 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:03:28,922 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:03:28,922 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:03:28,924 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:16" (3/4) ... [2021-11-13 18:03:28,927 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 18:03:28,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:03:28,928 INFO L158 Benchmark]: Toolchain (without parser) took 13994.17ms. Allocated memory was 69.2MB in the beginning and 107.0MB in the end (delta: 37.7MB). Free memory was 45.6MB in the beginning and 53.8MB in the end (delta: -8.2MB). Peak memory consumption was 28.1MB. Max. memory is 16.1GB. [2021-11-13 18:03:28,929 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory was 32.6MB in the beginning and 32.5MB in the end (delta: 41.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:03:28,929 INFO L158 Benchmark]: CACSL2BoogieTranslator took 548.64ms. Allocated memory is still 69.2MB. Free memory was 45.4MB in the beginning and 44.3MB in the end (delta: 1.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:03:28,930 INFO L158 Benchmark]: Boogie Preprocessor took 140.46ms. Allocated memory is still 69.2MB. Free memory was 44.3MB in the beginning and 41.0MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:03:28,930 INFO L158 Benchmark]: RCFGBuilder took 1074.17ms. Allocated memory is still 69.2MB. Free memory was 41.0MB in the beginning and 34.6MB in the end (delta: 6.4MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2021-11-13 18:03:28,931 INFO L158 Benchmark]: TraceAbstraction took 12217.43ms. Allocated memory was 69.2MB in the beginning and 107.0MB in the end (delta: 37.7MB). Free memory was 34.0MB in the beginning and 53.8MB in the end (delta: -19.8MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2021-11-13 18:03:28,932 INFO L158 Benchmark]: Witness Printer took 6.20ms. Allocated memory is still 107.0MB. Free memory is still 53.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:03:28,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 52.4MB. Free memory was 32.6MB in the beginning and 32.5MB in the end (delta: 41.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 548.64ms. Allocated memory is still 69.2MB. Free memory was 45.4MB in the beginning and 44.3MB in the end (delta: 1.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 140.46ms. Allocated memory is still 69.2MB. Free memory was 44.3MB in the beginning and 41.0MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1074.17ms. Allocated memory is still 69.2MB. Free memory was 41.0MB in the beginning and 34.6MB in the end (delta: 6.4MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. * TraceAbstraction took 12217.43ms. Allocated memory was 69.2MB in the beginning and 107.0MB in the end (delta: 37.7MB). Free memory was 34.0MB in the beginning and 53.8MB in the end (delta: -19.8MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * Witness Printer took 6.20ms. Allocated memory is still 107.0MB. Free memory is still 53.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 569]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 569. Possible FailurePath: [L533] int i = 0; [L534] int y = 0; [L535] List a = (List) malloc(sizeof(struct node)); [L536] COND FALSE !(a == 0) VAL [a={1:0}, i=0, y=0] [L537] List t; [L538] List p = a; VAL [a={1:0}, i=0, p={1:0}, y=0] [L539] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L547] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L555] p->h = 3 VAL [a={1:0}, i=0, p={1:0}, y=0] [L556] p->n = (void*)__VERIFIER_nondet_ulong() VAL [__VERIFIER_nondet_ulong()=0, a={1:0}, i=0, p={1:0}, y=0] [L557] i = 0 [L558] y = 0 [L559] p = a VAL [a={1:0}, i=0, p={1:0}, y=0] [L560] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L560] COND FALSE !(p->h == 1) [L564] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L564] COND FALSE !(p->h == 2) [L568] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L568] COND TRUE p->h != 3 || (i + y) < 20 [L569] reach_error() VAL [a={1:0}, i=0, p={1:0}, y=0] - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 119 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1056 SdHoareTripleChecker+Valid, 5608.60ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1056 mSDsluCounter, 1464 SdHoareTripleChecker+Invalid, 4833.54ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 37 IncrementalHoareTripleChecker+Unchecked, 1058 mSDsCounter, 183 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1669 IncrementalHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 183 mSolverCounterUnsat, 406 mSDtfsCounter, 1669 mSolverCounterSat, 38.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 241 GetRequests, 169 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=3, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 289 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 202 ConstructedInterpolants, 1 QuantifiedInterpolants, 1010 SizeOfPredicates, 31 NumberOfNonLiveVariables, 613 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-13 18:03:28,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e928af37-6bd9-4923-b159-9c79b09dca83/bin/uautomizer-YU5uOKAj3y/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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample