./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8 --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 c82f9f6b2ddd9cc29ac088c74e4e84d5622d389d0c95b67e6fa7eaa0a2f36f61 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 21:55:52,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:55:52,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:55:52,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:55:52,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:55:52,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:55:52,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:55:52,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:55:52,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:55:52,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:55:52,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:55:52,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:55:52,660 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:55:52,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:55:52,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:55:52,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:55:52,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:55:52,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:55:52,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:55:52,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:55:52,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:55:52,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:55:52,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:55:52,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:55:52,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:55:52,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:55:52,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:55:52,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:55:52,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:55:52,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:55:52,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:55:52,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:55:52,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:55:52,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:55:52,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:55:52,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:55:52,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:55:52,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:55:52,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:55:52,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:55:52,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:55:52,685 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:55:52,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:55:52,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:55:52,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:55:52,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:55:52,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:55:52,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:55:52,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:55:52,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:55:52,715 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:55:52,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:55:52,716 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:55:52,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:55:52,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:55:52,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:55:52,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:55:52,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:55:52,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:55:52,717 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:55:52,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:55:52,717 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:55:52,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:55:52,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:55:52,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:55:52,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:55:52,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:55:52,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:55:52,719 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:55:52,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:55:52,720 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:55:52,720 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c82f9f6b2ddd9cc29ac088c74e4e84d5622d389d0c95b67e6fa7eaa0a2f36f61 [2022-12-13 21:55:52,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:55:52,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:55:52,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:55:52,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:55:52,921 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:55:52,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2022-12-13 21:55:55,531 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:55:55,685 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:55:55,686 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i [2022-12-13 21:55:55,690 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/data/a55ef0360/e322acdbe0ce4524bad1084084bb500c/FLAG47fbbc800 [2022-12-13 21:55:55,700 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/data/a55ef0360/e322acdbe0ce4524bad1084084bb500c [2022-12-13 21:55:55,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:55:55,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:55:55,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:55:55,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:55:55,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:55:55,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc6506b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55, skipping insertion in model container [2022-12-13 21:55:55,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:55:55,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:55:55,837 WARN L237 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_35f57a7c-f467-40a1-af9a-6cad53789a7f/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i[821,834] [2022-12-13 21:55:55,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:55:55,856 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:55:55,866 WARN L237 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_35f57a7c-f467-40a1-af9a-6cad53789a7f/sv-benchmarks/c/array-examples/standard_minInArray_ground-1.i[821,834] [2022-12-13 21:55:55,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:55:55,882 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:55:55,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55 WrapperNode [2022-12-13 21:55:55,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:55:55,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:55:55,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:55:55,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:55:55,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,906 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-12-13 21:55:55,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:55:55,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:55:55,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:55:55,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:55:55,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:55:55,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:55:55,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:55:55,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:55:55,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (1/1) ... [2022-12-13 21:55:55,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:55:55,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:55:55,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:55:55,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:55:55,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:55:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:55:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:55:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:55:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:55:55,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:55:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:55:55,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:55:56,041 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:55:56,043 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:55:56,120 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:55:56,125 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:55:56,125 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 21:55:56,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:55:56 BoogieIcfgContainer [2022-12-13 21:55:56,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:55:56,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:55:56,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:55:56,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:55:56,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:55:55" (1/3) ... [2022-12-13 21:55:56,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e9231d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:55:56, skipping insertion in model container [2022-12-13 21:55:56,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:55:55" (2/3) ... [2022-12-13 21:55:56,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12e9231d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:55:56, skipping insertion in model container [2022-12-13 21:55:56,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:55:56" (3/3) ... [2022-12-13 21:55:56,134 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-1.i [2022-12-13 21:55:56,148 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:55:56,148 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:55:56,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:55:56,189 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@cb9b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:55:56,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:55:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) [2022-12-13 21:55:56,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 21:55:56,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:56,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:56,201 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2022-12-13 21:55:56,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343240722] [2022-12-13 21:55:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:55:56,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:55:56,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343240722] [2022-12-13 21:55:56,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343240722] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:55:56,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:55:56,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:55:56,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223354612] [2022-12-13 21:55:56,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:55:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:55:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:55:56,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:55:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:55:56,386 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:55:56,414 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-12-13 21:55:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:55:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 21:55:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:55:56,424 INFO L225 Difference]: With dead ends: 36 [2022-12-13 21:55:56,425 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 21:55:56,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:55:56,431 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:55:56,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:55:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 21:55:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-12-13 21:55:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-12-13 21:55:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-12-13 21:55:56,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-12-13 21:55:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:55:56,457 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-12-13 21:55:56,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:56,458 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-12-13 21:55:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 21:55:56,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:56,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:55:56,459 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2022-12-13 21:55:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040715991] [2022-12-13 21:55:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:56,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:55:56,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:55:56,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040715991] [2022-12-13 21:55:56,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040715991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:55:56,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352828914] [2022-12-13 21:55:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:56,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:56,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:55:56,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:55:56,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:55:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:56,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 21:55:56,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:55:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:55:56,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:55:56,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352828914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:55:56,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:55:56,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 21:55:56,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050659953] [2022-12-13 21:55:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:55:56,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:55:56,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:55:56,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:55:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:55:56,592 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:55:56,606 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-12-13 21:55:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:55:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 21:55:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:55:56,608 INFO L225 Difference]: With dead ends: 26 [2022-12-13 21:55:56,608 INFO L226 Difference]: Without dead ends: 19 [2022-12-13 21:55:56,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 21:55:56,609 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:55:56,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:55:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-13 21:55:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-12-13 21:55:56,612 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) [2022-12-13 21:55:56,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-13 21:55:56,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-12-13 21:55:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:55:56,613 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-13 21:55:56,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-13 21:55:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 21:55:56,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:56,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:56,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:55:56,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:56,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2022-12-13 21:55:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764905028] [2022-12-13 21:55:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:55:56,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:55:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764905028] [2022-12-13 21:55:56,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764905028] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:55:56,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695120790] [2022-12-13 21:55:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:56,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:55:56,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:55:56,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:55:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:55:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:55:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:55:57,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:55:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:55:57,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695120790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:55:57,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:55:57,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 21:55:57,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099079786] [2022-12-13 21:55:57,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:55:57,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:55:57,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:55:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:55:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:55:57,091 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:55:57,116 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-12-13 21:55:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:55:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 21:55:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:55:57,118 INFO L225 Difference]: With dead ends: 35 [2022-12-13 21:55:57,118 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 21:55:57,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:55:57,120 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:55:57,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:55:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 21:55:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-13 21:55:57,124 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) [2022-12-13 21:55:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-12-13 21:55:57,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-12-13 21:55:57,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:55:57,125 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-12-13 21:55:57,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:57,125 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-12-13 21:55:57,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 21:55:57,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:57,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:57,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:55:57,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:57,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:57,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2025336791, now seen corresponding path program 2 times [2022-12-13 21:55:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:57,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920018265] [2022-12-13 21:55:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 21:55:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:55:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920018265] [2022-12-13 21:55:57,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920018265] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:55:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734535724] [2022-12-13 21:55:57,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:55:57,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:57,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:55:57,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:55:57,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:55:57,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:55:57,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:55:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 21:55:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:55:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:55:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:55:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 21:55:57,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734535724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:55:57,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:55:57,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-13 21:55:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657596144] [2022-12-13 21:55:57,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:55:57,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 21:55:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:55:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 21:55:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:55:57,644 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-12-13 21:55:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:55:57,694 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-12-13 21:55:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 21:55:57,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 [2022-12-13 21:55:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:55:57,696 INFO L225 Difference]: With dead ends: 52 [2022-12-13 21:55:57,696 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 21:55:57,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 21:55:57,697 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:55:57,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:55:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 21:55:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-12-13 21:55:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 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) [2022-12-13 21:55:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-12-13 21:55:57,704 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2022-12-13 21:55:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:55:57,705 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-12-13 21:55:57,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-12-13 21:55:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-12-13 21:55:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 21:55:57,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:57,706 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:57,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:55:57,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:57,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash -930592990, now seen corresponding path program 3 times [2022-12-13 21:55:57,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:57,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371535788] [2022-12-13 21:55:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 21:55:58,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:55:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371535788] [2022-12-13 21:55:58,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371535788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:55:58,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275326153] [2022-12-13 21:55:58,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:55:58,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:58,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:55:58,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:55:58,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:55:58,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 21:55:58,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:55:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 21:55:58,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:55:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 21:55:58,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:55:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 21:55:58,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275326153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:55:58,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:55:58,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-12-13 21:55:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389804924] [2022-12-13 21:55:58,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:55:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 21:55:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:55:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 21:55:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 21:55:58,350 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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) [2022-12-13 21:55:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:55:58,418 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-12-13 21:55:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 21:55:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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 35 [2022-12-13 21:55:58,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:55:58,420 INFO L225 Difference]: With dead ends: 68 [2022-12-13 21:55:58,420 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 21:55:58,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 21:55:58,422 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:55:58,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:55:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 21:55:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-12-13 21:55:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-12-13 21:55:58,427 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2022-12-13 21:55:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:55:58,427 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-12-13 21:55:58,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 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) [2022-12-13 21:55:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-12-13 21:55:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 21:55:58,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:58,428 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:58,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:55:58,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:58,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 4 times [2022-12-13 21:55:58,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141249736] [2022-12-13 21:55:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:55:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:55:58,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:55:58,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141249736] [2022-12-13 21:55:58,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141249736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:55:58,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572915412] [2022-12-13 21:55:58,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:55:58,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:58,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:55:58,947 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:55:58,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:55:59,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:55:59,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:55:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 21:55:59,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:55:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:55:59,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:55:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:55:59,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572915412] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:55:59,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:55:59,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-13 21:55:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780732735] [2022-12-13 21:55:59,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:55:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 21:55:59,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:55:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 21:55:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 21:55:59,259 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:55:59,330 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2022-12-13 21:55:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 21:55:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-13 21:55:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:55:59,331 INFO L225 Difference]: With dead ends: 105 [2022-12-13 21:55:59,331 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 21:55:59,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-12-13 21:55:59,332 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:55:59,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 44 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:55:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 21:55:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-12-13 21:55:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 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) [2022-12-13 21:55:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-12-13 21:55:59,338 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 49 [2022-12-13 21:55:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:55:59,338 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-12-13 21:55:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:55:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-12-13 21:55:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 21:55:59,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:55:59,339 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:55:59,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:55:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:55:59,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:55:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:55:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1287758790, now seen corresponding path program 5 times [2022-12-13 21:55:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:55:59,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319069778] [2022-12-13 21:55:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:55:59,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:55:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:56:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:56:00,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:56:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319069778] [2022-12-13 21:56:00,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319069778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:56:00,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659001325] [2022-12-13 21:56:00,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:56:00,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:56:00,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:56:00,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:56:01,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-12-13 21:56:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:56:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 21:56:01,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:56:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:56:01,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:56:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:56:01,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659001325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:56:01,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:56:01,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-12-13 21:56:01,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892160669] [2022-12-13 21:56:01,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:56:01,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 21:56:01,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:56:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 21:56:01,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 21:56:01,812 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-12-13 21:56:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:56:01,972 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-12-13 21:56:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 21:56:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 75 [2022-12-13 21:56:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:56:01,974 INFO L225 Difference]: With dead ends: 157 [2022-12-13 21:56:01,974 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 21:56:01,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 21:56:01,976 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:56:01,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 114 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:56:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 21:56:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-12-13 21:56:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 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) [2022-12-13 21:56:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2022-12-13 21:56:01,983 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 75 [2022-12-13 21:56:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:56:01,984 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2022-12-13 21:56:01,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-12-13 21:56:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2022-12-13 21:56:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-13 21:56:01,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:56:01,985 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:56:01,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:56:02,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 21:56:02,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:56:02,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:56:02,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1463270510, now seen corresponding path program 6 times [2022-12-13 21:56:02,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:56:02,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961750240] [2022-12-13 21:56:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:56:02,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:56:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:56:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 21:56:03,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:56:03,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961750240] [2022-12-13 21:56:03,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961750240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:56:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424291445] [2022-12-13 21:56:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 21:56:03,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:56:03,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:56:03,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:56:03,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 21:56:03,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:56:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 21:56:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:56:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-12-13 21:56:04,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:56:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-12-13 21:56:04,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424291445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:56:04,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:56:04,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2022-12-13 21:56:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302758819] [2022-12-13 21:56:04,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:56:04,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 21:56:04,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:56:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 21:56:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 21:56:04,177 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 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) [2022-12-13 21:56:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:56:04,321 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2022-12-13 21:56:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 21:56:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 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 127 [2022-12-13 21:56:04,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:56:04,324 INFO L225 Difference]: With dead ends: 184 [2022-12-13 21:56:04,324 INFO L226 Difference]: Without dead ends: 157 [2022-12-13 21:56:04,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 21:56:04,327 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:56:04,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:56:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-12-13 21:56:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-12-13 21:56:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 155 states have internal predecessors, (172), 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) [2022-12-13 21:56:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2022-12-13 21:56:04,334 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 127 [2022-12-13 21:56:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:56:04,334 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2022-12-13 21:56:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 states have internal predecessors, (156), 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) [2022-12-13 21:56:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2022-12-13 21:56:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-13 21:56:04,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:56:04,336 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:56:04,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:56:04,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:04,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:56:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:56:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1124380112, now seen corresponding path program 7 times [2022-12-13 21:56:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:56:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775510466] [2022-12-13 21:56:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:56:04,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:56:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:56:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:05,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:56:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775510466] [2022-12-13 21:56:05,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775510466] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:56:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241238427] [2022-12-13 21:56:05,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 21:56:05,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:56:05,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:56:05,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 21:56:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:56:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 21:56:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:56:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:06,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:56:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:08,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241238427] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:56:08,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:56:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-12-13 21:56:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840599712] [2022-12-13 21:56:08,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:56:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-13 21:56:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:56:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-13 21:56:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 21:56:08,294 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-12-13 21:56:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:56:08,529 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-12-13 21:56:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-13 21:56:08,529 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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 153 [2022-12-13 21:56:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:56:08,530 INFO L225 Difference]: With dead ends: 313 [2022-12-13 21:56:08,530 INFO L226 Difference]: Without dead ends: 262 [2022-12-13 21:56:08,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-12-13 21:56:08,532 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:56:08,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 72 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:56:08,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-13 21:56:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-12-13 21:56:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0651340996168583) internal successors, (278), 261 states have internal predecessors, (278), 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) [2022-12-13 21:56:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 278 transitions. [2022-12-13 21:56:08,541 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 278 transitions. Word has length 153 [2022-12-13 21:56:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:56:08,541 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 278 transitions. [2022-12-13 21:56:08,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-12-13 21:56:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 278 transitions. [2022-12-13 21:56:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-12-13 21:56:08,544 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:56:08,544 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:56:08,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 21:56:08,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:08,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:56:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:56:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2002911398, now seen corresponding path program 8 times [2022-12-13 21:56:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:56:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445804999] [2022-12-13 21:56:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:56:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:56:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:56:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:56:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445804999] [2022-12-13 21:56:13,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445804999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:56:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908210276] [2022-12-13 21:56:13,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:56:13,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:13,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:56:13,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:56:13,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 21:56:13,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:56:13,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:56:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-13 21:56:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:56:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:56:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:22,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908210276] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:56:22,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:56:22,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-12-13 21:56:22,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854095584] [2022-12-13 21:56:22,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:56:22,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-12-13 21:56:22,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:56:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-12-13 21:56:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-12-13 21:56:22,993 INFO L87 Difference]: Start difference. First operand 262 states and 278 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-12-13 21:56:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:56:23,808 INFO L93 Difference]: Finished difference Result 525 states and 662 transitions. [2022-12-13 21:56:23,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-12-13 21:56:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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 259 [2022-12-13 21:56:23,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:56:23,810 INFO L225 Difference]: With dead ends: 525 [2022-12-13 21:56:23,810 INFO L226 Difference]: Without dead ends: 474 [2022-12-13 21:56:23,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-12-13 21:56:23,813 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:56:23,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 21:56:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-12-13 21:56:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-12-13 21:56:23,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.0359408033826638) internal successors, (490), 473 states have internal predecessors, (490), 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) [2022-12-13 21:56:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 490 transitions. [2022-12-13 21:56:23,823 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 490 transitions. Word has length 259 [2022-12-13 21:56:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:56:23,824 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 490 transitions. [2022-12-13 21:56:23,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-12-13 21:56:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 490 transitions. [2022-12-13 21:56:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-12-13 21:56:23,829 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:56:23,829 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:56:23,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 21:56:24,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 21:56:24,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:56:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:56:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash -523881518, now seen corresponding path program 9 times [2022-12-13 21:56:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:56:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132301703] [2022-12-13 21:56:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:56:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:56:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:56:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-12-13 21:56:43,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:56:43,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132301703] [2022-12-13 21:56:43,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132301703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:56:43,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204792749] [2022-12-13 21:56:43,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:56:43,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:56:43,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:56:43,682 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:56:43,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 21:56:43,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 21:56:43,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:56:43,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 21:56:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:56:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-12-13 21:56:44,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:56:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-12-13 21:56:45,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204792749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:56:45,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:56:45,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2022-12-13 21:56:45,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217081424] [2022-12-13 21:56:45,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:56:45,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2022-12-13 21:56:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:56:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2022-12-13 21:56:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2022-12-13 21:56:45,995 INFO L87 Difference]: Start difference. First operand 474 states and 490 transitions. Second operand has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 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) [2022-12-13 21:56:47,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:56:47,075 INFO L93 Difference]: Finished difference Result 576 states and 640 transitions. [2022-12-13 21:56:47,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-12-13 21:56:47,075 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 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 471 [2022-12-13 21:56:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:56:47,077 INFO L225 Difference]: With dead ends: 576 [2022-12-13 21:56:47,077 INFO L226 Difference]: Without dead ends: 525 [2022-12-13 21:56:47,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6300 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2022-12-13 21:56:47,079 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 21:56:47,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 151 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 21:56:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-12-13 21:56:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 524. [2022-12-13 21:56:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0630975143403443) internal successors, (556), 523 states have internal predecessors, (556), 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) [2022-12-13 21:56:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 556 transitions. [2022-12-13 21:56:47,089 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 556 transitions. Word has length 471 [2022-12-13 21:56:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:56:47,090 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 556 transitions. [2022-12-13 21:56:47,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 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) [2022-12-13 21:56:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 556 transitions. [2022-12-13 21:56:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-12-13 21:56:47,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:56:47,096 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:56:47,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 21:56:47,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 21:56:47,298 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:56:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:56:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash 968252304, now seen corresponding path program 10 times [2022-12-13 21:56:47,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:56:47,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340125287] [2022-12-13 21:56:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:56:47,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:56:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:57:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-12-13 21:57:09,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:57:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340125287] [2022-12-13 21:57:09,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340125287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:57:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973895924] [2022-12-13 21:57:09,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:57:09,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:57:09,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:57:09,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:57:09,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 21:57:09,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:57:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:57:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 2192 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 21:57:09,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:57:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 44521 trivial. 0 not checked. [2022-12-13 21:57:11,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:57:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 44521 trivial. 0 not checked. [2022-12-13 21:57:13,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973895924] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:57:13,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:57:13,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 33, 33] total 276 [2022-12-13 21:57:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076694907] [2022-12-13 21:57:13,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:57:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 276 states [2022-12-13 21:57:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:57:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 276 interpolants. [2022-12-13 21:57:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2022-12-13 21:57:13,732 INFO L87 Difference]: Start difference. First operand 524 states and 556 transitions. Second operand has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 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) [2022-12-13 21:57:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:57:15,312 INFO L93 Difference]: Finished difference Result 722 states and 850 transitions. [2022-12-13 21:57:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-12-13 21:57:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 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 521 [2022-12-13 21:57:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:57:15,316 INFO L225 Difference]: With dead ends: 722 [2022-12-13 21:57:15,316 INFO L226 Difference]: Without dead ends: 623 [2022-12-13 21:57:15,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13082 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2022-12-13 21:57:15,319 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 217 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 21:57:15,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 227 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 21:57:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-12-13 21:57:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 622. [2022-12-13 21:57:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.104669887278583) internal successors, (686), 621 states have internal predecessors, (686), 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) [2022-12-13 21:57:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 686 transitions. [2022-12-13 21:57:15,330 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 686 transitions. Word has length 521 [2022-12-13 21:57:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:57:15,330 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 686 transitions. [2022-12-13 21:57:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 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) [2022-12-13 21:57:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 686 transitions. [2022-12-13 21:57:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-12-13 21:57:15,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:57:15,333 INFO L195 NwaCegarLoop]: trace histogram [212, 212, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:57:15,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 21:57:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 21:57:15,534 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:57:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:57:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1096007374, now seen corresponding path program 11 times [2022-12-13 21:57:15,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:57:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454899672] [2022-12-13 21:57:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:57:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:57:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:57:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50679 backedges. 0 proven. 44944 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-12-13 21:57:37,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:57:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454899672] [2022-12-13 21:57:37,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454899672] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:57:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334619994] [2022-12-13 21:57:37,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:57:37,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:57:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:57:37,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:57:37,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f57a7c-f467-40a1-af9a-6cad53789a7f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process