./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:40:32,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:40:32,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:40:32,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:40:32,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:40:32,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:40:32,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:40:32,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:40:32,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:40:32,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:40:32,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:40:32,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:40:32,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:40:32,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:40:32,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:40:32,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:40:32,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:40:32,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:40:32,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:40:32,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:40:32,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:40:32,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:40:32,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:40:32,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:40:32,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:40:32,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:40:32,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:40:32,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:40:32,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:40:32,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:40:32,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:40:32,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:40:32,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:40:32,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:40:32,791 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:40:32,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:40:32,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:40:32,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:40:32,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:40:32,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:40:32,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:40:32,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 17:40:32,863 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:40:32,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:40:32,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:40:32,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:40:32,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:40:32,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:40:32,867 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:40:32,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:40:32,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:40:32,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:40:32,870 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:40:32,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:40:32,870 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:40:32,871 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:40:32,871 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:40:32,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:40:32,872 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:40:32,872 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:40:32,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:40:32,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:40:32,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:40:32,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:40:32,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:40:32,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:40:32,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:40:32,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:40:32,877 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:40:32,878 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:40:32,878 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:40:32,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:40:32,879 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:40:32,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:40:32,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:40:32,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:40:32,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:40:32,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:32,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:40:32,881 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:40:32,881 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:40:32,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:40:32,882 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:40:32,882 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:40:32,882 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b [2021-11-23 17:40:33,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:40:33,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:40:33,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:40:33,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:40:33,240 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:40:33,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-11-23 17:40:33,372 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/e7995c667/0f8bbfccf8d84bfdbf6f55aa01165290/FLAG0a61461ae [2021-11-23 17:40:33,928 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:40:33,928 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-11-23 17:40:33,936 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/e7995c667/0f8bbfccf8d84bfdbf6f55aa01165290/FLAG0a61461ae [2021-11-23 17:40:34,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/e7995c667/0f8bbfccf8d84bfdbf6f55aa01165290 [2021-11-23 17:40:34,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:40:34,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:40:34,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:34,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:40:34,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:40:34,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7cb15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34, skipping insertion in model container [2021-11-23 17:40:34,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:40:34,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:40:34,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:34,604 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:40:34,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:34,653 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:40:34,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34 WrapperNode [2021-11-23 17:40:34,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:34,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:34,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:40:34,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:40:34,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,705 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2021-11-23 17:40:34,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:34,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:40:34,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:40:34,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:40:34,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:40:34,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:40:34,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:40:34,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:40:34,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:34" (1/1) ... [2021-11-23 17:40:34,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:34,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:34,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:40:34,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:40:34,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:40:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:40:34,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:40:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:40:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:40:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:40:34,965 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:40:34,966 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:40:35,104 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:40:35,127 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:40:35,133 INFO L158 Benchmark]: Toolchain (without parser) took 830.58ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 68.7MB in the beginning and 88.4MB in the end (delta: -19.7MB). Peak memory consumption was 1.1MB. Max. memory is 16.1GB. [2021-11-23 17:40:35,134 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:40:35,136 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.60ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 68.4MB in the beginning and 101.0MB in the end (delta: -32.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:40:35,137 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.66ms. Allocated memory is still 125.8MB. Free memory was 101.0MB in the beginning and 99.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:40:35,138 INFO L158 Benchmark]: Boogie Preprocessor took 53.09ms. Allocated memory is still 125.8MB. Free memory was 99.5MB in the beginning and 98.9MB in the end (delta: 624.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:40:35,140 INFO L158 Benchmark]: RCFGBuilder took 368.18ms. Allocated memory is still 125.8MB. Free memory was 98.9MB in the beginning and 88.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:40:35,177 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 102.8MB. Free memory was 55.8MB in the beginning and 55.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.60ms. Allocated memory was 102.8MB in the beginning and 125.8MB in the end (delta: 23.1MB). Free memory was 68.4MB in the beginning and 101.0MB in the end (delta: -32.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.66ms. Allocated memory is still 125.8MB. Free memory was 101.0MB in the beginning and 99.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.09ms. Allocated memory is still 125.8MB. Free memory was 99.5MB in the beginning and 98.9MB in the end (delta: 624.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 368.18ms. Allocated memory is still 125.8MB. Free memory was 98.9MB in the beginning and 88.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:40:35,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/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_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:40:38,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:40:38,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:40:38,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:40:38,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:40:38,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:40:38,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:40:38,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:40:38,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:40:38,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:40:38,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:40:38,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:40:38,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:40:38,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:40:38,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:40:38,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:40:38,465 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:40:38,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:40:38,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:40:38,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:40:38,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:40:38,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:40:38,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:40:38,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:40:38,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:40:38,506 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:40:38,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:40:38,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:40:38,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:40:38,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:40:38,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:40:38,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:40:38,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:40:38,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:40:38,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:40:38,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:40:38,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:40:38,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:40:38,523 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:40:38,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:40:38,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:40:38,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 17:40:38,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:40:38,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:40:38,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:40:38,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:40:38,571 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:40:38,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:40:38,572 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:40:38,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:40:38,572 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:40:38,573 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:40:38,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:40:38,573 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:40:38,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:40:38,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:40:38,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:40:38,575 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:40:38,575 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:40:38,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:40:38,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:40:38,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:40:38,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:40:38,577 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:40:38,577 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:40:38,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:40:38,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:40:38,578 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:40:38,578 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:40:38,578 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:40:38,578 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:40:38,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:40:38,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:40:38,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:40:38,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:38,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:40:38,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:40:38,580 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:40:38,581 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:38,581 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:40:38,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:40:38,593 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_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b [2021-11-23 17:40:39,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:40:39,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:40:39,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:40:39,071 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:40:39,074 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:40:39,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-11-23 17:40:39,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/4ca4c6979/131af653bcca415dbfa0c18e923cf1dc/FLAG3c336ef25 [2021-11-23 17:40:39,905 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:40:39,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-11-23 17:40:39,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/4ca4c6979/131af653bcca415dbfa0c18e923cf1dc/FLAG3c336ef25 [2021-11-23 17:40:40,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/data/4ca4c6979/131af653bcca415dbfa0c18e923cf1dc [2021-11-23 17:40:40,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:40:40,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:40:40,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:40,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:40:40,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:40:40,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5149c3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40, skipping insertion in model container [2021-11-23 17:40:40,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:40:40,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:40:40,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:40,500 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:40:40,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:40:40,543 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:40:40,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40 WrapperNode [2021-11-23 17:40:40,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:40:40,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:40,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:40:40,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:40:40,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,661 INFO L137 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2021-11-23 17:40:40,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:40:40,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:40:40,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:40:40,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:40:40,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:40:40,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:40:40,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:40:40,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:40:40,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (1/1) ... [2021-11-23 17:40:40,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:40:40,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:40,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:40:40,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:40:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 17:40:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:40:40,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:40:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-23 17:40:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:40:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:40:40,960 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:40:40,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:40:41,178 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:40:41,186 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:40:41,186 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:40:41,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:40:41 BoogieIcfgContainer [2021-11-23 17:40:41,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:40:41,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:40:41,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:40:41,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:40:41,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:40:40" (1/3) ... [2021-11-23 17:40:41,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e3a15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:40:41, skipping insertion in model container [2021-11-23 17:40:41,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:40:40" (2/3) ... [2021-11-23 17:40:41,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e3a15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:40:41, skipping insertion in model container [2021-11-23 17:40:41,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:40:41" (3/3) ... [2021-11-23 17:40:41,201 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2021-11-23 17:40:41,208 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:40:41,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-23 17:40:41,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:40:41,281 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 [2021-11-23 17:40:41,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-23 17:40:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 17:40:41,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:41,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 17:40:41,311 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 926022, now seen corresponding path program 1 times [2021-11-23 17:40:41,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922549222] [2021-11-23 17:40:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:41,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:41,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:41,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:40:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:40:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:41,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:41,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922549222] [2021-11-23 17:40:41,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922549222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:41,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:41,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:41,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337116210] [2021-11-23 17:40:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:40:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:40:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:40:41,639 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:41,656 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-11-23 17:40:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:40:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 17:40:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:41,668 INFO L225 Difference]: With dead ends: 23 [2021-11-23 17:40:41,669 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 17:40:41,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:40:41,677 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:41,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 17:40:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 17:40:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-23 17:40:41,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 4 [2021-11-23 17:40:41,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:41,721 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-23 17:40:41,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-23 17:40:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 17:40:41,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:41,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 17:40:41,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:41,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:41,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 925712, now seen corresponding path program 1 times [2021-11-23 17:40:41,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635746908] [2021-11-23 17:40:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:41,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:41,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:41,938 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:41,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:40:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:42,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:42,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:42,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:42,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635746908] [2021-11-23 17:40:42,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635746908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:42,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:42,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:42,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439292953] [2021-11-23 17:40:42,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:42,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:42,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:42,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:42,074 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:42,145 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-23 17:40:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 17:40:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:42,154 INFO L225 Difference]: With dead ends: 27 [2021-11-23 17:40:42,155 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 17:40:42,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:42,159 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:42,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:40:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 17:40:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-23 17:40:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-23 17:40:42,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2021-11-23 17:40:42,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:42,181 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-23 17:40:42,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-23 17:40:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 17:40:42,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:42,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 17:40:42,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:42,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:42,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:42,396 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-11-23 17:40:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:42,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289641918] [2021-11-23 17:40:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:42,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:42,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:42,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:42,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:40:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:42,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:40:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:42,575 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 [2021-11-23 17:40:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:42,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:42,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:42,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289641918] [2021-11-23 17:40:42,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289641918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:42,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:42,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:42,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741955140] [2021-11-23 17:40:42,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:42,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:42,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:42,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:42,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:42,607 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:42,676 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-23 17:40:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 17:40:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:42,678 INFO L225 Difference]: With dead ends: 20 [2021-11-23 17:40:42,679 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 17:40:42,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:42,685 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:42,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:40:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 17:40:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-23 17:40:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-23 17:40:42,701 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2021-11-23 17:40:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:42,702 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-23 17:40:42,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-23 17:40:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 17:40:42,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:42,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 17:40:42,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:42,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:42,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-11-23 17:40:42,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:42,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119087877] [2021-11-23 17:40:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:42,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:42,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:42,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:40:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:40:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:43,046 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 [2021-11-23 17:40:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:43,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119087877] [2021-11-23 17:40:43,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119087877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:43,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:43,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:43,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28756778] [2021-11-23 17:40:43,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:43,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:43,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:43,119 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:43,190 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-23 17:40:43,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:43,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 17:40:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:43,192 INFO L225 Difference]: With dead ends: 22 [2021-11-23 17:40:43,192 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 17:40:43,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:43,194 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:43,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:40:43,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 17:40:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-11-23 17:40:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-23 17:40:43,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2021-11-23 17:40:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:43,200 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-23 17:40:43,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-23 17:40:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:40:43,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:43,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:43,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:43,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:43,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 264435860, now seen corresponding path program 1 times [2021-11-23 17:40:43,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916136879] [2021-11-23 17:40:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:43,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:43,419 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:43,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:40:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:43,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916136879] [2021-11-23 17:40:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916136879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:43,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136220783] [2021-11-23 17:40:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:43,589 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:43,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:43,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:43,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:40:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136220783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651438198] [2021-11-23 17:40:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:43,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:43,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:43,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:43,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:40:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:43,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:43,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:43,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651438198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:43,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:40:43,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:40:43,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788966887] [2021-11-23 17:40:43,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:40:43,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:40:43,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:43,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:40:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:40:43,929 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:44,065 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-11-23 17:40:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:40:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 17:40:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:44,069 INFO L225 Difference]: With dead ends: 33 [2021-11-23 17:40:44,069 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 17:40:44,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:40:44,070 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:44,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:40:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 17:40:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-11-23 17:40:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-23 17:40:44,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 8 [2021-11-23 17:40:44,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:44,087 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-23 17:40:44,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-23 17:40:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:40:44,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:44,089 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:44,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:44,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:44,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-23 17:40:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:44,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:44,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:44,705 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-11-23 17:40:44,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:44,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394798651] [2021-11-23 17:40:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:44,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:44,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:44,707 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:44,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:40:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:40:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:44,782 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 [2021-11-23 17:40:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:44,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:45,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394798651] [2021-11-23 17:40:45,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394798651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034060892] [2021-11-23 17:40:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:45,461 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:45,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:45,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:40:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:40:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:45,638 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 [2021-11-23 17:40:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:45,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:46,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1034060892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929284721] [2021-11-23 17:40:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:46,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:46,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:46,039 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:46,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:40:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:46,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:40:46,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:46,130 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 [2021-11-23 17:40:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:46,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929284721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:46,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:40:46,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2021-11-23 17:40:46,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034808840] [2021-11-23 17:40:46,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:40:46,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:40:46,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:40:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:40:46,472 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:46,974 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-23 17:40:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:40:46,975 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 17:40:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:46,976 INFO L225 Difference]: With dead ends: 32 [2021-11-23 17:40:46,976 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 17:40:46,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:40:46,978 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:46,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 35 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:40:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 17:40:46,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 17:40:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-23 17:40:46,984 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 8 [2021-11-23 17:40:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:46,984 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-23 17:40:46,984 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-23 17:40:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:40:46,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:46,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2021-11-23 17:40:47,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:47,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:47,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:47,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:47,586 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:47,587 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457123, now seen corresponding path program 2 times [2021-11-23 17:40:47,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:47,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276216815] [2021-11-23 17:40:47,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:40:47,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:47,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:47,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:47,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:40:47,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 17:40:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:47,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:40:47,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:47,660 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 [2021-11-23 17:40:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 17:40:47,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:47,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276216815] [2021-11-23 17:40:47,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276216815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:47,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:47,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:40:47,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128448955] [2021-11-23 17:40:47,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:47,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:47,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:47,845 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:47,871 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-23 17:40:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:47,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 17:40:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:47,873 INFO L225 Difference]: With dead ends: 30 [2021-11-23 17:40:47,873 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 17:40:47,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:47,874 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:47,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:40:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 17:40:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 17:40:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-23 17:40:47,880 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 20 [2021-11-23 17:40:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:47,881 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-23 17:40:47,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-23 17:40:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 17:40:47,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:47,882 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2021-11-23 17:40:47,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:48,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:48,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:40:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2021-11-23 17:40:48,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:48,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389808411] [2021-11-23 17:40:48,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:40:48,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:48,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:48,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:48,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:40:48,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:40:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:48,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:40:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:48,175 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 [2021-11-23 17:40:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:48,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:50,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389808411] [2021-11-23 17:40:50,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389808411] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:50,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690337906] [2021-11-23 17:40:50,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:40:50,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:40:50,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:40:50,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:40:50,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:40:50,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:40:50,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:40:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:50,781 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 [2021-11-23 17:40:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:51,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690337906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118144454] [2021-11-23 17:40:51,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:40:51,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:40:51,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:40:51,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:40:51,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 17:40:51,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:40:51,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:40:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:40:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:51,977 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 [2021-11-23 17:40:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:52,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:40:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:54,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118144454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:40:54,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:40:54,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 17 [2021-11-23 17:40:54,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087812040] [2021-11-23 17:40:54,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:40:54,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:40:54,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:40:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:40:54,762 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:57,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:41:00,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 17:41:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:02,943 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2021-11-23 17:41:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 17:41:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 17:41:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:02,946 INFO L225 Difference]: With dead ends: 99 [2021-11-23 17:41:02,946 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 17:41:02,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-11-23 17:41:02,947 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 313 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:02,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 101 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 17:41:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 17:41:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2021-11-23 17:41:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-23 17:41:02,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 20 [2021-11-23 17:41:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:02,956 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-23 17:41:02,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-23 17:41:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:41:02,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:02,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:03,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:03,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:03,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-23 17:41:03,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:03,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:41:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1807984667, now seen corresponding path program 1 times [2021-11-23 17:41:03,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:03,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314999816] [2021-11-23 17:41:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:03,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:03,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:03,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:03,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:41:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:41:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:03,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:03,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314999816] [2021-11-23 17:41:03,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314999816] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:03,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267694689] [2021-11-23 17:41:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:03,970 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:03,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:03,981 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:03,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:41:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:41:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:04,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:04,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267694689] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305934037] [2021-11-23 17:41:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:04,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:04,320 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:04,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:41:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:41:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:04,432 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 [2021-11-23 17:41:04,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 17:41:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:04,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:05,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305934037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:05,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:05,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 10] total 25 [2021-11-23 17:41:05,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660326823] [2021-11-23 17:41:05,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:05,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:41:05,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:41:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:41:05,805 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:07,276 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-11-23 17:41:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 17:41:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 17:41:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:07,278 INFO L225 Difference]: With dead ends: 62 [2021-11-23 17:41:07,278 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 17:41:07,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=334, Invalid=658, Unknown=0, NotChecked=0, Total=992 [2021-11-23 17:41:07,280 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:07,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 105 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 17:41:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 17:41:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-23 17:41:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.103448275862069) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-23 17:41:07,288 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 27 [2021-11-23 17:41:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:07,289 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-23 17:41:07,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.48) internal successors, (87), 25 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-23 17:41:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 17:41:07,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:07,292 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2021-11-23 17:41:07,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:07,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 17:41:07,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:07,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:07,904 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:41:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:07,905 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2021-11-23 17:41:07,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:07,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146869251] [2021-11-23 17:41:07,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:41:07,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:07,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:07,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:07,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 17:41:07,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 17:41:07,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:07,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:41:07,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:07,997 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 [2021-11-23 17:41:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-23 17:41:08,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:08,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:08,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146869251] [2021-11-23 17:41:08,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146869251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:08,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:08,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 17:41:08,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899915441] [2021-11-23 17:41:08,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:08,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:41:08,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:41:08,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:41:08,528 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:08,609 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-23 17:41:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:41:08,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 17:41:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:08,612 INFO L225 Difference]: With dead ends: 60 [2021-11-23 17:41:08,613 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 17:41:08,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:41:08,615 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:08,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:41:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 17:41:08,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-23 17:41:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-23 17:41:08,623 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2021-11-23 17:41:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-23 17:41:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-23 17:41:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 17:41:08,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:08,627 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:08,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:08,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:08,832 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:41:08,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1707920246, now seen corresponding path program 2 times [2021-11-23 17:41:08,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:08,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071151448] [2021-11-23 17:41:08,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:08,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:08,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:08,834 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:08,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:41:08,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 17:41:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:41:08,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-23 17:41:09,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:09,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:09,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071151448] [2021-11-23 17:41:09,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071151448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:09,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:09,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:41:09,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044657936] [2021-11-23 17:41:09,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:09,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:41:09,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:09,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:41:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:41:09,392 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:09,409 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-11-23 17:41:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:41:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 17:41:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:09,411 INFO L225 Difference]: With dead ends: 62 [2021-11-23 17:41:09,411 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 17:41:09,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:41:09,412 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:09,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-23 17:41:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 17:41:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-23 17:41:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-23 17:41:09,436 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 47 [2021-11-23 17:41:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:09,437 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-23 17:41:09,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-23 17:41:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 17:41:09,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:09,445 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:09,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-23 17:41:09,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:09,659 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 4 more)] === [2021-11-23 17:41:09,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1707912301, now seen corresponding path program 1 times [2021-11-23 17:41:09,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:09,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341734559] [2021-11-23 17:41:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:09,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:09,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:09,661 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:09,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 17:41:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 17:41:09,776 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 17:41:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 17:41:09,893 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-23 17:41:09,894 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 17:41:09,895 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (7 of 8 remaining) [2021-11-23 17:41:09,897 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 8 remaining) [2021-11-23 17:41:09,898 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 8 remaining) [2021-11-23 17:41:09,898 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 8 remaining) [2021-11-23 17:41:09,898 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 8 remaining) [2021-11-23 17:41:09,899 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2021-11-23 17:41:09,899 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (1 of 8 remaining) [2021-11-23 17:41:09,899 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-11-23 17:41:09,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:10,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:10,112 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 17:41:10,117 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 17:41:10,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 05:41:10 BoogieIcfgContainer [2021-11-23 17:41:10,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 17:41:10,185 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 17:41:10,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 17:41:10,185 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 17:41:10,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:40:41" (3/4) ... [2021-11-23 17:41:10,188 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 17:41:10,271 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/witness.graphml [2021-11-23 17:41:10,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 17:41:10,272 INFO L158 Benchmark]: Toolchain (without parser) took 30017.32ms. Allocated memory was 56.6MB in the beginning and 92.3MB in the end (delta: 35.7MB). Free memory was 34.5MB in the beginning and 58.6MB in the end (delta: -24.1MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-11-23 17:41:10,273 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 56.6MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:41:10,273 INFO L158 Benchmark]: CACSL2BoogieTranslator took 304.66ms. Allocated memory is still 56.6MB. Free memory was 34.3MB in the beginning and 40.6MB in the end (delta: -6.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:41:10,274 INFO L158 Benchmark]: Boogie Procedure Inliner took 96.04ms. Allocated memory was 56.6MB in the beginning and 75.5MB in the end (delta: 18.9MB). Free memory was 40.6MB in the beginning and 58.9MB in the end (delta: -18.3MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. [2021-11-23 17:41:10,274 INFO L158 Benchmark]: Boogie Preprocessor took 64.65ms. Allocated memory is still 75.5MB. Free memory was 58.7MB in the beginning and 57.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:41:10,275 INFO L158 Benchmark]: RCFGBuilder took 459.44ms. Allocated memory is still 75.5MB. Free memory was 57.5MB in the beginning and 47.8MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:41:10,275 INFO L158 Benchmark]: TraceAbstraction took 28992.51ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 47.4MB in the beginning and 61.9MB in the end (delta: -14.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:41:10,276 INFO L158 Benchmark]: Witness Printer took 86.54ms. Allocated memory is still 92.3MB. Free memory was 61.9MB in the beginning and 58.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:41:10,279 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 56.6MB. Free memory was 37.6MB in the beginning and 37.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 304.66ms. Allocated memory is still 56.6MB. Free memory was 34.3MB in the beginning and 40.6MB in the end (delta: -6.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 96.04ms. Allocated memory was 56.6MB in the beginning and 75.5MB in the end (delta: 18.9MB). Free memory was 40.6MB in the beginning and 58.9MB in the end (delta: -18.3MB). Peak memory consumption was 2.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.65ms. Allocated memory is still 75.5MB. Free memory was 58.7MB in the beginning and 57.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 459.44ms. Allocated memory is still 75.5MB. Free memory was 57.5MB in the beginning and 47.8MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 28992.51ms. Allocated memory was 75.5MB in the beginning and 92.3MB in the end (delta: 16.8MB). Free memory was 47.4MB in the beginning and 61.9MB in the end (delta: -14.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Witness Printer took 86.54ms. Allocated memory is still 92.3MB. Free memory was 61.9MB in the beginning and 58.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; VAL [alloca(10 * sizeof(char))={3:0}, i=0, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=0, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=0, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=1, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=1, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=1, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=2, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=2, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=97, alloca(10 * sizeof(char))={3:0}, i=2, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=3, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=3, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=3, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=4, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=4, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=4, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=5, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=5, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=5, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=6, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=6, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=6, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=7, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=7, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=7, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=8, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=8, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=8, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=9, p={3:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={3:0}, i=9, p={3:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={3:0}, i=9, p={3:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={3:0}, i=10, p={3:0}] [L9] COND FALSE !(i < 10) VAL [alloca(10 * sizeof(char))={3:0}, i=10, p={3:0}] [L13] EXPR p[2] VAL [alloca(10 * sizeof(char))={3:0}, i=10, p={3:0}, p[2]=97] [L13] COND TRUE p[2] == 'a' [L14] free(p) VAL [alloca(10 * sizeof(char))={3:0}, i=10, p={3:0}] [L14] free(p) VAL [alloca(10 * sizeof(char))={3:0}, i=10, p={3:0}] - UnprovableResult [Line: 10]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 10]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: 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 1 procedures, 23 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 28.8s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 535 SdHoareTripleChecker+Valid, 5.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 535 mSDsluCounter, 421 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 265 mSDsCounter, 75 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 576 IncrementalHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 75 mSolverCounterUnsat, 156 mSDtfsCounter, 576 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=9, InterpolantAutomatonStates: 65, 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, 11 MinimizatonAttempts, 56 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 363 NumberOfCodeBlocks, 271 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 474 ConstructedInterpolants, 45 QuantifiedInterpolants, 4884 SizeOfPredicates, 31 NumberOfNonLiveVariables, 756 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 31 InterpolantComputations, 7 PerfectInterpolantSequences, 418/898 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 proved your program to be incorrect! [2021-11-23 17:41:10,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91c5b613-0368-4337-8570-ebe2fb108f6e/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)