./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:38:03,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:38:03,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:38:03,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:38:03,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:38:03,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:38:03,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:38:03,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:38:03,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:38:03,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:38:03,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:38:03,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:38:03,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:38:03,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:38:03,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:38:03,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:38:03,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:38:03,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:38:03,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:38:03,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:38:03,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:38:03,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:38:03,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:38:03,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:38:03,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:38:03,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:38:03,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:38:03,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:38:03,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:38:03,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:38:03,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:38:03,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:38:03,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:38:03,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:38:03,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:38:03,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:38:03,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:38:03,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:38:03,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:38:03,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:38:03,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:38:03,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:38:03,925 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:38:03,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:38:03,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:38:03,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:38:03,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:38:03,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:38:03,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:38:03,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:38:03,929 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:38:03,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:38:03,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:38:03,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:38:03,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:38:03,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:38:03,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:38:03,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:38:03,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:38:03,933 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:38:03,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:38:03,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:38:03,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:38:03,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:38:03,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:38:03,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:38:03,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:38:03,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:38:03,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:38:03,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:38:03,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:38:03,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:38:03,936 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:38:03,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:38:03,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:38:03,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:38:03,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2021-11-20 05:38:04,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:38:04,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:38:04,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:38:04,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:38:04,226 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:38:04,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-20 05:38:04,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/data/2527b96e1/8fa4927927cf429089f016a51e5675f7/FLAG930d72a1e [2021-11-20 05:38:04,877 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:38:04,878 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-20 05:38:04,904 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/data/2527b96e1/8fa4927927cf429089f016a51e5675f7/FLAG930d72a1e [2021-11-20 05:38:05,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/data/2527b96e1/8fa4927927cf429089f016a51e5675f7 [2021-11-20 05:38:05,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:38:05,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:38:05,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:38:05,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:38:05,275 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:38:05,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442f6f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05, skipping insertion in model container [2021-11-20 05:38:05,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:38:05,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:38:05,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-20 05:38:05,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:38:05,684 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:38:05,753 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-20 05:38:05,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:38:05,788 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:38:05,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05 WrapperNode [2021-11-20 05:38:05,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:38:05,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:38:05,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:38:05,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:38:05,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,847 INFO L137 Inliner]: procedures = 126, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2021-11-20 05:38:05,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:38:05,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:38:05,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:38:05,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:38:05,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:38:05,883 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:38:05,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:38:05,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:38:05,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (1/1) ... [2021-11-20 05:38:05,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:38:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:05,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:38:05,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:38:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:38:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:38:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:38:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:38:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:38:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:38:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:38:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:38:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:38:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:38:05,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:38:06,131 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:38:06,139 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:38:06,285 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:38:06,292 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:38:06,293 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 05:38:06,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:38:06 BoogieIcfgContainer [2021-11-20 05:38:06,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:38:06,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:38:06,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:38:06,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:38:06,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:38:05" (1/3) ... [2021-11-20 05:38:06,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6bfe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:38:06, skipping insertion in model container [2021-11-20 05:38:06,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:38:05" (2/3) ... [2021-11-20 05:38:06,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6bfe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:38:06, skipping insertion in model container [2021-11-20 05:38:06,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:38:06" (3/3) ... [2021-11-20 05:38:06,308 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-11-20 05:38:06,313 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:38:06,313 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:38:06,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:38:06,387 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-11-20 05:38:06,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:38:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 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) [2021-11-20 05:38:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:38:06,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:06,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:06,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:06,413 INFO L85 PathProgramCache]: Analyzing trace with hash -409335067, now seen corresponding path program 1 times [2021-11-20 05:38:06,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653396834] [2021-11-20 05:38:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:06,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:06,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653396834] [2021-11-20 05:38:06,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653396834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:06,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:06,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:38:06,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480832503] [2021-11-20 05:38:06,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:06,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:38:06,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:38:06,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:38:06,644 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 05:38:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:06,658 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-11-20 05:38:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:38:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-11-20 05:38:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:06,665 INFO L225 Difference]: With dead ends: 32 [2021-11-20 05:38:06,665 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 05:38:06,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:38:06,671 INFO L933 BasicCegarLoop]: 22 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, 22 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 [2021-11-20 05:38:06,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 05:38:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 05:38:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-11-20 05:38:06,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-20 05:38:06,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2021-11-20 05:38:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:06,702 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-20 05:38:06,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-11-20 05:38:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-20 05:38:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:38:06,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:06,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:06,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:38:06,704 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1724492075, now seen corresponding path program 1 times [2021-11-20 05:38:06,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:06,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466224597] [2021-11-20 05:38:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:06,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:06,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:06,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466224597] [2021-11-20 05:38:06,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466224597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:06,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:06,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:38:06,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477497928] [2021-11-20 05:38:06,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:06,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:38:06,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:06,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:38:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:38:06,767 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-20 05:38:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:06,780 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-20 05:38:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:38:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-20 05:38:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:06,781 INFO L225 Difference]: With dead ends: 30 [2021-11-20 05:38:06,781 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 05:38:06,782 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 [2021-11-20 05:38:06,783 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:06,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 05:38:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-11-20 05:38:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:38:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-20 05:38:06,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-20 05:38:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:06,797 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-20 05:38:06,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-20 05:38:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-20 05:38:06,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:38:06,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:06,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:06,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:38:06,801 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1461985389, now seen corresponding path program 1 times [2021-11-20 05:38:06,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:06,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364524462] [2021-11-20 05:38:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:06,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:06,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364524462] [2021-11-20 05:38:06,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364524462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953861015] [2021-11-20 05:38:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:06,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:06,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:06,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:06,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:38:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:07,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:38:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:07,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:07,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953861015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:07,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:07,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-20 05:38:07,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995620785] [2021-11-20 05:38:07,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:07,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:38:07,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:38:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:07,257 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-11-20 05:38:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:07,290 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-20 05:38:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:38:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 05:38:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:07,291 INFO L225 Difference]: With dead ends: 31 [2021-11-20 05:38:07,292 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 05:38:07,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:07,294 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:07,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 05:38:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 05:38:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) 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) [2021-11-20 05:38:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-20 05:38:07,315 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2021-11-20 05:38:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:07,315 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-20 05:38:07,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-11-20 05:38:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-20 05:38:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:38:07,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:07,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:07,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:07,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:07,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1187812821, now seen corresponding path program 2 times [2021-11-20 05:38:07,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:07,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284485329] [2021-11-20 05:38:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:07,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:38:07,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284485329] [2021-11-20 05:38:07,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284485329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:38:07,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:38:07,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:38:07,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128990380] [2021-11-20 05:38:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:38:07,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:38:07,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:38:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:38:07,627 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-11-20 05:38:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:07,668 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-11-20 05:38:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:38:07,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 19 [2021-11-20 05:38:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:07,671 INFO L225 Difference]: With dead ends: 29 [2021-11-20 05:38:07,671 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 05:38:07,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:38:07,674 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 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 [2021-11-20 05:38:07,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 05:38:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-20 05:38:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-11-20 05:38:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-11-20 05:38:07,688 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2021-11-20 05:38:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:07,689 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-11-20 05:38:07,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-11-20 05:38:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-11-20 05:38:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 05:38:07,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:07,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:07,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:38:07,692 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1492503821, now seen corresponding path program 1 times [2021-11-20 05:38:07,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:07,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516319980] [2021-11-20 05:38:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:07,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:38:07,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516319980] [2021-11-20 05:38:07,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516319980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440973387] [2021-11-20 05:38:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:07,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:07,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:07,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:07,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:38:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:07,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:38:07,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:38:07,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:38:08,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440973387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:38:08,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:38:08,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-20 05:38:08,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912320108] [2021-11-20 05:38:08,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:38:08,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:38:08,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:38:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:38:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:38:08,050 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-11-20 05:38:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:38:08,082 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-20 05:38:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:38:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 22 [2021-11-20 05:38:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:38:08,083 INFO L225 Difference]: With dead ends: 30 [2021-11-20 05:38:08,083 INFO L226 Difference]: Without dead ends: 26 [2021-11-20 05:38:08,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:38:08,085 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:38:08,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 38 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:38:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-20 05:38:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-20 05:38:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-11-20 05:38:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-20 05:38:08,091 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2021-11-20 05:38:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:38:08,091 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-20 05:38:08,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-11-20 05:38:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-20 05:38:08,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:38:08,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:38:08,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:38:08,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:38:08,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:08,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:38:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:38:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1018778923, now seen corresponding path program 2 times [2021-11-20 05:38:08,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:38:08,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407314283] [2021-11-20 05:38:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:38:08,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:38:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:38:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:09,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:38:09,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407314283] [2021-11-20 05:38:09,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407314283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:38:09,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997596058] [2021-11-20 05:38:09,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:38:09,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:38:09,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:38:09,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:38:09,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4739e61f-40b6-4f43-8ec4-2fad19d51ffa/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:38:09,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:38:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:38:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-20 05:38:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:38:09,158 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 [2021-11-20 05:38:09,230 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 05:38:09,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 05:38:09,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:38:09,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 05:38:09,491 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-20 05:38:09,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-20 05:38:09,612 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:38:09,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2021-11-20 05:38:09,629 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 05:38:09,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 05:38:09,818 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-20 05:38:09,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2021-11-20 05:38:09,862 INFO L354 Elim1Store]: treesize reduction 96, result has 23.2 percent of original size [2021-11-20 05:38:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 92 [2021-11-20 05:38:10,223 INFO L354 Elim1Store]: treesize reduction 114, result has 15.6 percent of original size [2021-11-20 05:38:10,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 173 treesize of output 104 [2021-11-20 05:38:10,251 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-20 05:38:10,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 96 [2021-11-20 05:38:10,529 INFO L354 Elim1Store]: treesize reduction 200, result has 14.5 percent of original size [2021-11-20 05:38:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 127 treesize of output 110 [2021-11-20 05:38:10,554 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-11-20 05:38:10,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 87 [2021-11-20 05:38:10,890 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 05:38:10,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 56 [2021-11-20 05:38:10,902 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 05:38:10,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 05:38:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:38:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:38:26,555 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_node_create_~temp~0#1.offset| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (let ((.cse9 (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse9 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_2) v_DerPreprocessor_1 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse8 (+ (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) .cse9 0) |ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_3) .cse8 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse0 (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_node_create_~temp~0#1.base|)) (let ((.cse3 (select (select .cse1 .cse0) .cse8))) (let ((.cse4 (select (select .cse6 .cse0) .cse8)) (.cse5 (+ .cse3 4))) (and (= (select (select (store .cse1 |c_ULTIMATE.start_main_~#s~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#s~0#1.offset| .cse3)) .cse4) .cse5) 0) (= (select (select (store .cse6 |c_ULTIMATE.start_main_~#s~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#s~0#1.offset| .cse4)) .cse4) .cse5) 0)))) (not (= .cse8 v_DerPreprocessor_1))))))))))) is different from false [2021-11-20 05:41:51,755 WARN L227 SmtUtils]: Spent 3.39m on a formula simplification. DAG size of input: 1592 DAG size of output: 600 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 05:41:51,759 INFO L354 Elim1Store]: treesize reduction 43592, result has 20.2 percent of original size [2021-11-20 05:41:51,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 31 select indices, 31 select index equivalence classes, 0 disjoint index pairs (out of 465 index pairs), introduced 39 new quantified variables, introduced 465 case distinctions, treesize of input 66107996376 treesize of output 63490831529