./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa --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 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:09:53,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:09:53,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:09:53,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:09:53,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:09:53,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:09:53,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:09:53,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:09:53,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:09:53,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:09:53,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:09:53,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:09:53,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:09:53,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:09:53,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:09:53,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:09:53,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:09:53,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:09:53,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:09:53,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:09:53,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:09:53,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:09:53,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:09:53,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:09:53,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:09:53,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:09:53,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:09:53,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:09:53,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:09:53,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:09:53,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:09:53,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:09:53,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:09:53,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:09:53,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:09:53,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:09:53,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:09:53,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:09:53,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:09:53,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:09:53,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:09:53,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:09:53,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:09:53,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:09:53,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:09:53,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:09:53,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:09:53,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:09:53,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:09:53,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:09:53,982 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:09:53,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:09:53,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:09:53,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:09:53,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:09:53,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:09:53,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:09:53,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:09:53,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:09:53,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:09:53,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:09:53,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:09:53,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:09:53,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:09:53,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:09:53,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:09:53,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:09:53,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:09:53,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:09:53,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:09:53,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:09:53,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:09:53,986 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:09:53,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:09:53,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:09:53,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:09:53,987 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_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b1cf2dd5b4da09460afcca66f285dbd0591f4fa3369eb070fcfcc2c1d99d315 [2021-12-06 18:09:54,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:09:54,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:09:54,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:09:54,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:09:54,212 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:09:54,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2021-12-06 18:09:54,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/data/3e315e52c/7bfaaa90511a4fbe95cbb26e1452334f/FLAGb6c86e0f6 [2021-12-06 18:09:54,645 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:09:54,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i [2021-12-06 18:09:54,655 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/data/3e315e52c/7bfaaa90511a4fbe95cbb26e1452334f/FLAGb6c86e0f6 [2021-12-06 18:09:54,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/data/3e315e52c/7bfaaa90511a4fbe95cbb26e1452334f [2021-12-06 18:09:54,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:09:54,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:09:54,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:09:54,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:09:54,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:09:54,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745c40cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54, skipping insertion in model container [2021-12-06 18:09:54,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:09:54,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:09:54,878 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_68659a5b-e081-41c6-96a6-939d28a2ef55/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2021-12-06 18:09:54,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:09:54,886 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:09:54,914 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_68659a5b-e081-41c6-96a6-939d28a2ef55/sv-benchmarks/c/list-ext3-properties/sll_length_check-2.i[23814,23827] [2021-12-06 18:09:54,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:09:54,935 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:09:54,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54 WrapperNode [2021-12-06 18:09:54,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:09:54,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:09:54,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:09:54,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:09:54,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,966 INFO L137 Inliner]: procedures = 125, calls = 15, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2021-12-06 18:09:54,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:09:54,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:09:54,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:09:54,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:09:54,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:54,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:09:54,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:09:54,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:09:54,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:09:54,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (1/1) ... [2021-12-06 18:09:55,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:09:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:09:55,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:09:55,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:09:55,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:09:55,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:09:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:09:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:09:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:09:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:09:55,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:09:55,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:09:55,128 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:09:55,129 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:09:55,224 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:09:55,229 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:09:55,229 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:09:55,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:09:55 BoogieIcfgContainer [2021-12-06 18:09:55,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:09:55,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:09:55,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:09:55,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:09:55,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:09:54" (1/3) ... [2021-12-06 18:09:55,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecf3d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:09:55, skipping insertion in model container [2021-12-06 18:09:55,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:09:54" (2/3) ... [2021-12-06 18:09:55,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ecf3d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:09:55, skipping insertion in model container [2021-12-06 18:09:55,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:09:55" (3/3) ... [2021-12-06 18:09:55,236 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2021-12-06 18:09:55,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:09:55,240 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:09:55,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:09:55,282 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 [2021-12-06 18:09:55,282 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:09:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2021-12-06 18:09:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 18:09:55,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:55,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:55,299 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1050078975, now seen corresponding path program 1 times [2021-12-06 18:09:55,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:55,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898363534] [2021-12-06 18:09:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:55,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:55,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:55,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898363534] [2021-12-06 18:09:55,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898363534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:55,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:55,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:09:55,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390015285] [2021-12-06 18:09:55,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:55,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:09:55,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:09:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:09:55,451 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-12-06 18:09:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:55,462 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2021-12-06 18:09:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:09:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2021-12-06 18:09:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:55,469 INFO L225 Difference]: With dead ends: 41 [2021-12-06 18:09:55,469 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 18:09:55,471 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 [2021-12-06 18:09:55,474 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2021-12-06 18:09:55,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:09:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 18:09:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 18:09:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2021-12-06 18:09:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-06 18:09:55,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2021-12-06 18:09:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:55,498 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-06 18:09:55,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-12-06 18:09:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-06 18:09:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:09:55,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:55,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:55,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:09:55,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:55,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:55,500 INFO L85 PathProgramCache]: Analyzing trace with hash 924106356, now seen corresponding path program 1 times [2021-12-06 18:09:55,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:55,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6894833] [2021-12-06 18:09:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:55,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:55,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:55,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6894833] [2021-12-06 18:09:55,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6894833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:55,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:55,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:09:55,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808155234] [2021-12-06 18:09:55,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:55,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:09:55,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:09:55,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:09:55,556 INFO L87 Difference]: Start difference. First operand 17 states and 20 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) [2021-12-06 18:09:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:55,587 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-06 18:09:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:09:55,587 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 14 [2021-12-06 18:09:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:55,588 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:09:55,588 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 18:09:55,588 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 [2021-12-06 18:09:55,590 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:55,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:09:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 18:09:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2021-12-06 18:09:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-12-06 18:09:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-12-06 18:09:55,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2021-12-06 18:09:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:55,595 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-12-06 18:09:55,595 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) [2021-12-06 18:09:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-12-06 18:09:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:09:55,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:55,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:55,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:09:55,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1149244957, now seen corresponding path program 1 times [2021-12-06 18:09:55,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288872289] [2021-12-06 18:09:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:55,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:55,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288872289] [2021-12-06 18:09:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288872289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:09:55,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970576371] [2021-12-06 18:09:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:55,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:55,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:09:55,658 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:09:55,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:09:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:09:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:55,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:09:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:55,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970576371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:09:55,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:09:55,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-06 18:09:55,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220053539] [2021-12-06 18:09:55,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:09:55,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 18:09:55,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:55,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 18:09:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:09:55,801 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-12-06 18:09:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:55,850 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-12-06 18:09:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:09:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) Word has length 17 [2021-12-06 18:09:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:55,851 INFO L225 Difference]: With dead ends: 48 [2021-12-06 18:09:55,851 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 18:09:55,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:09:55,853 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:55,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:09:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 18:09:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2021-12-06 18:09:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-12-06 18:09:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-06 18:09:55,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2021-12-06 18:09:55,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:55,857 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-06 18:09:55,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-12-06 18:09:55,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-06 18:09:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:09:55,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:55,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:55,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:09:56,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:56,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:56,062 INFO L85 PathProgramCache]: Analyzing trace with hash -485609004, now seen corresponding path program 2 times [2021-12-06 18:09:56,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:56,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905581358] [2021-12-06 18:09:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:09:56,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:56,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905581358] [2021-12-06 18:09:56,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905581358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:09:56,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:09:56,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:09:56,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719695145] [2021-12-06 18:09:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:09:56,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:09:56,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:09:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:09:56,227 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-12-06 18:09:56,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:56,266 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-12-06 18:09:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:09:56,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 18:09:56,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:56,267 INFO L225 Difference]: With dead ends: 27 [2021-12-06 18:09:56,267 INFO L226 Difference]: Without dead ends: 22 [2021-12-06 18:09:56,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:09:56,269 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:56,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 56 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:09:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-06 18:09:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-06 18:09:56,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2021-12-06 18:09:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-12-06 18:09:56,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 20 [2021-12-06 18:09:56,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:56,275 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-12-06 18:09:56,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2021-12-06 18:09:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-12-06 18:09:56,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 18:09:56,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:56,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:56,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:09:56,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2117322972, now seen corresponding path program 1 times [2021-12-06 18:09:56,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:56,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379555087] [2021-12-06 18:09:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:56,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379555087] [2021-12-06 18:09:56,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379555087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:09:56,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598458639] [2021-12-06 18:09:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:56,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:09:56,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:09:56,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:09:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 18:09:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:56,467 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 11 treesize of output 7 [2021-12-06 18:09:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 18:09:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:09:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:56,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598458639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:09:56,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:09:56,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 12 [2021-12-06 18:09:56,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068048349] [2021-12-06 18:09:56,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:09:56,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:09:56,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:09:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:09:56,555 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2021-12-06 18:09:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:56,634 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-06 18:09:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:09:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 21 [2021-12-06 18:09:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:56,635 INFO L225 Difference]: With dead ends: 30 [2021-12-06 18:09:56,635 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 18:09:56,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:09:56,636 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:09:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 18:09:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-06 18:09:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2021-12-06 18:09:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-06 18:09:56,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2021-12-06 18:09:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:56,640 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-06 18:09:56,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2021-12-06 18:09:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-06 18:09:56,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 18:09:56,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:56,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:56,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:09:56,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:56,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:56,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1160848428, now seen corresponding path program 2 times [2021-12-06 18:09:56,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:56,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94579364] [2021-12-06 18:09:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:56,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:09:57,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94579364] [2021-12-06 18:09:57,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94579364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:09:57,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569652138] [2021-12-06 18:09:57,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:09:57,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:57,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:09:57,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:09:57,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:09:57,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:09:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:09:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:09:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:09:57,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:09:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:09:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569652138] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:09:57,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:09:57,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-06 18:09:57,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970491755] [2021-12-06 18:09:57,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:09:57,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:09:57,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:09:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:09:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:09:57,214 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-12-06 18:09:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:09:57,265 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-12-06 18:09:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:09:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2021-12-06 18:09:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:09:57,266 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:09:57,266 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 18:09:57,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:09:57,267 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:09:57,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:09:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 18:09:57,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-12-06 18:09:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-12-06 18:09:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-12-06 18:09:57,274 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 22 [2021-12-06 18:09:57,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:09:57,274 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-12-06 18:09:57,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2021-12-06 18:09:57,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-12-06 18:09:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:09:57,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:09:57,275 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:09:57,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:09:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:57,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:09:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:09:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1574908636, now seen corresponding path program 3 times [2021-12-06 18:09:57,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:09:57,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562681036] [2021-12-06 18:09:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:09:57,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:09:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:09:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:57,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:09:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562681036] [2021-12-06 18:09:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562681036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:09:57,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87132430] [2021-12-06 18:09:57,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:09:57,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:09:57,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:09:57,688 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:09:57,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:09:57,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:09:57,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:09:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 18:09:57,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:09:57,748 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 [2021-12-06 18:09:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:09:57,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:09:57,806 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:09:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:09:57,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 18:09:57,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:09:58,013 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 18:09:58,014 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 61 treesize of output 35 [2021-12-06 18:09:58,022 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:09:58,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 18:09:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:09:58,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:00,118 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0)) (and (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0) (= (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_13|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|) 0)))) is different from false [2021-12-06 18:10:00,358 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 10 treesize of output 8 [2021-12-06 18:10:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 18:10:00,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87132430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:00,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:00,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-06 18:10:00,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447794192] [2021-12-06 18:10:00,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:00,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:10:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:00,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:10:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=331, Unknown=1, NotChecked=36, Total=420 [2021-12-06 18:10:00,376 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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) [2021-12-06 18:10:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:08,688 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-12-06 18:10:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:10:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 23 [2021-12-06 18:10:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:08,689 INFO L225 Difference]: With dead ends: 63 [2021-12-06 18:10:08,689 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 18:10:08,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=83, Invalid=472, Unknown=1, NotChecked=44, Total=600 [2021-12-06 18:10:08,690 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:08,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 195 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 101 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-12-06 18:10:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 18:10:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-12-06 18:10:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 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) [2021-12-06 18:10:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-12-06 18:10:08,699 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 23 [2021-12-06 18:10:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:08,699 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-12-06 18:10:08,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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) [2021-12-06 18:10:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-12-06 18:10:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 18:10:08,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:08,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:08,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:08,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:08,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2090698365, now seen corresponding path program 1 times [2021-12-06 18:10:08,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:08,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226277762] [2021-12-06 18:10:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:08,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226277762] [2021-12-06 18:10:08,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226277762] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:08,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131007118] [2021-12-06 18:10:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:08,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:08,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:08,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:08,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:10:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:10:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:09,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:09,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131007118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:09,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:09,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2021-12-06 18:10:09,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544258826] [2021-12-06 18:10:09,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:09,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:10:09,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:10:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:10:09,077 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-12-06 18:10:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:09,148 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-12-06 18:10:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:10:09,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 25 [2021-12-06 18:10:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:09,149 INFO L225 Difference]: With dead ends: 61 [2021-12-06 18:10:09,150 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 18:10:09,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:10:09,151 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:09,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 123 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 18:10:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-12-06 18:10:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 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) [2021-12-06 18:10:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-06 18:10:09,159 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 25 [2021-12-06 18:10:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:09,159 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-06 18:10:09,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2021-12-06 18:10:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-06 18:10:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:10:09,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:09,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:09,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:10:09,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 18:10:09,361 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1224539237, now seen corresponding path program 4 times [2021-12-06 18:10:09,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456034436] [2021-12-06 18:10:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:09,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:10:09,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456034436] [2021-12-06 18:10:09,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456034436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68505110] [2021-12-06 18:10:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:10:09,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:09,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:09,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:09,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:10:09,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:10:09,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:09,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:10:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:10:09,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:10:09,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68505110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:09,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 18:10:09,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2021-12-06 18:10:09,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641727435] [2021-12-06 18:10:09,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:09,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:10:09,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:10:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:10:09,526 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2021-12-06 18:10:09,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:09,563 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-12-06 18:10:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:10:09,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) Word has length 26 [2021-12-06 18:10:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:09,564 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:10:09,564 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:10:09,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:10:09,565 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:09,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:10:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-06 18:10:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2021-12-06 18:10:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-06 18:10:09,568 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-12-06 18:10:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:09,568 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-06 18:10:09,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 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) [2021-12-06 18:10:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-06 18:10:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 18:10:09,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:09,569 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:09,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:10:09,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:09,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash -517577932, now seen corresponding path program 2 times [2021-12-06 18:10:09,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093633948] [2021-12-06 18:10:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:09,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:09,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:09,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093633948] [2021-12-06 18:10:09,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093633948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:09,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715320275] [2021-12-06 18:10:09,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:10:09,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:09,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:09,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:09,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:10:10,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:10:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:10,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:10:10,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:10,048 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 [2021-12-06 18:10:10,077 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 11 treesize of output 7 [2021-12-06 18:10:10,107 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:10:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 18:10:10,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:10:10,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 18:10:10,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:10:10,262 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:10:10,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-06 18:10:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:10,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:10,450 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 10 treesize of output 8 [2021-12-06 18:10:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715320275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:10,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-06 18:10:10,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136748985] [2021-12-06 18:10:10,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:10,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:10:10,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:10,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:10:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:10:10,466 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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) [2021-12-06 18:10:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:10,798 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-12-06 18:10:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:10:10,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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 28 [2021-12-06 18:10:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:10,799 INFO L225 Difference]: With dead ends: 37 [2021-12-06 18:10:10,799 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 18:10:10,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:10:10,800 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:10,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 216 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2021-12-06 18:10:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 18:10:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-06 18:10:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-12-06 18:10:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 18:10:10,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2021-12-06 18:10:10,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:10,804 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 18:10:10,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 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) [2021-12-06 18:10:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 18:10:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:10:10,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:10,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:10,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:11,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:11,006 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:11,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1186607556, now seen corresponding path program 3 times [2021-12-06 18:10:11,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77259723] [2021-12-06 18:10:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:11,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:10:11,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77259723] [2021-12-06 18:10:11,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77259723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985306192] [2021-12-06 18:10:11,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:10:11,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:11,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:11,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:10:11,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:10:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:10:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:10:11,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:10:11,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985306192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:11,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:11,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-12-06 18:10:11,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648909991] [2021-12-06 18:10:11,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:11,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 18:10:11,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 18:10:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 18:10:11,372 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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) [2021-12-06 18:10:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:11,443 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-12-06 18:10:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:10:11,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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 29 [2021-12-06 18:10:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:11,444 INFO L225 Difference]: With dead ends: 61 [2021-12-06 18:10:11,444 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 18:10:11,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:10:11,445 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:11,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 148 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 18:10:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2021-12-06 18:10:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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) [2021-12-06 18:10:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-06 18:10:11,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 29 [2021-12-06 18:10:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:11,451 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-06 18:10:11,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 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) [2021-12-06 18:10:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-06 18:10:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:10:11,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:11,451 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:11,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:11,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:11,653 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:11,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1818217164, now seen corresponding path program 4 times [2021-12-06 18:10:11,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:11,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805044402] [2021-12-06 18:10:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:11,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:11,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805044402] [2021-12-06 18:10:11,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805044402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:11,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484501408] [2021-12-06 18:10:11,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:10:11,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:11,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:11,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68659a5b-e081-41c6-96a6-939d28a2ef55/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:10:12,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:10:12,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:12,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-06 18:10:12,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:12,036 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 [2021-12-06 18:10:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:10:12,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:10:12,079 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 18:10:12,080 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 [2021-12-06 18:10:12,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 18:10:12,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 18:10:12,166 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 18:10:12,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 18:10:12,237 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-06 18:10:12,237 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2021-12-06 18:10:12,247 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-06 18:10:12,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 18:10:12,885 INFO L354 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2021-12-06 18:10:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 51 [2021-12-06 18:10:13,003 INFO L354 Elim1Store]: treesize reduction 63, result has 13.7 percent of original size [2021-12-06 18:10:13,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 40 [2021-12-06 18:10:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:10:13,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:43,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:10:43,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11232 treesize of output 10728 [2021-12-06 18:10:47,010 INFO L354 Elim1Store]: treesize reduction 1848, result has 27.0 percent of original size [2021-12-06 18:10:47,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 25 new quantified variables, introduced 253 case distinctions, treesize of input 1341439 treesize of output 1257890 [2021-12-06 18:12:38,387 WARN L227 SmtUtils]: Spent 1.86m on a formula simplification. DAG size of input: 2449 DAG size of output: 2398 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:12:44,571 WARN L227 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 2388 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:13:01,039 WARN L227 SmtUtils]: Spent 11.13s on a formula simplification that was a NOOP. DAG size: 1979 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:13:11,948 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 1970 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:13:58,762 WARN L227 SmtUtils]: Spent 11.05s on a formula simplification that was a NOOP. DAG size: 1976 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:14:20,315 WARN L227 SmtUtils]: Spent 11.02s on a formula simplification that was a NOOP. DAG size: 1972 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:14:41,832 WARN L227 SmtUtils]: Spent 11.03s on a formula simplification that was a NOOP. DAG size: 1969 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:14:52,581 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 1959 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:15:37,360 WARN L227 SmtUtils]: Spent 10.99s on a formula simplification that was a NOOP. DAG size: 1965 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:15:48,097 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 1956 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:16:32,481 WARN L227 SmtUtils]: Spent 10.98s on a formula simplification that was a NOOP. DAG size: 1962 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:16:53,920 WARN L227 SmtUtils]: Spent 10.95s on a formula simplification that was a NOOP. DAG size: 1959 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:17:04,640 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 1949 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:18:17,250 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 1953 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:18:50,298 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification that was a NOOP. DAG size: 1963 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:19:24,505 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification that was a NOOP. DAG size: 1966 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)