./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/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_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/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_b8d741e0-f0f6-4776-9349-cc14e9b791a0/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 49ad15a378f82eb46c5309a80aca8c6c5eb2b292a6d759bef0e14aac07d4d52c --- 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 15:45:12,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:45:12,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:45:12,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:45:12,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:45:12,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:45:12,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:45:12,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:45:12,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:45:12,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:45:12,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:45:12,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:45:12,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:45:12,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:45:12,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:45:12,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:45:12,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:45:12,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:45:12,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:45:12,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:45:12,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:45:12,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:45:12,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:45:12,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:45:12,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:45:12,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:45:12,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:45:12,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:45:12,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:45:12,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:45:12,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:45:12,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:45:12,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:45:12,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:45:12,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:45:12,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:45:12,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:45:12,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:45:12,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:45:12,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:45:12,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:45:12,924 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:45:12,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:45:12,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:45:12,944 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:45:12,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:45:12,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:45:12,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:45:12,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:45:12,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:45:12,946 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:45:12,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:45:12,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:45:12,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:45:12,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:45:12,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:45:12,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:45:12,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:45:12,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:45:12,948 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:45:12,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:45:12,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:45:12,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:45:12,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:45:12,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:45:12,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:45:12,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:45:12,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:45:12,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:45:12,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:45:12,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:45:12,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:45:12,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:45:12,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:45:12,951 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:45:12,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:45:12,951 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:45:12,952 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_b8d741e0-f0f6-4776-9349-cc14e9b791a0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49ad15a378f82eb46c5309a80aca8c6c5eb2b292a6d759bef0e14aac07d4d52c [2022-12-13 15:45:13,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:45:13,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:45:13,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:45:13,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:45:13,165 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:45:13,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2022-12-13 15:45:15,779 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:45:15,933 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:45:15,934 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2022-12-13 15:45:15,940 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/data/638bf881b/1dd45ee98ac447eb987e0a1e84c5c340/FLAGfa4a9425c [2022-12-13 15:45:15,953 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/data/638bf881b/1dd45ee98ac447eb987e0a1e84c5c340 [2022-12-13 15:45:15,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:45:15,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:45:15,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:45:15,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:45:15,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:45:15,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:45:15" (1/1) ... [2022-12-13 15:45:15,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@246f27e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:15, skipping insertion in model container [2022-12-13 15:45:15,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:45:15" (1/1) ... [2022-12-13 15:45:15,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:45:15,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:45:16,096 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_b8d741e0-f0f6-4776-9349-cc14e9b791a0/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c[537,550] [2022-12-13 15:45:16,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:45:16,115 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:45:16,124 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_b8d741e0-f0f6-4776-9349-cc14e9b791a0/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound20.c[537,550] [2022-12-13 15:45:16,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:45:16,137 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:45:16,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16 WrapperNode [2022-12-13 15:45:16,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:45:16,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:45:16,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:45:16,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:45:16,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,162 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-12-13 15:45:16,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:45:16,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:45:16,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:45:16,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:45:16,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,176 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:45:16,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:45:16,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:45:16,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:45:16,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (1/1) ... [2022-12-13 15:45:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:45:16,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:16,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:45:16,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:45:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:45:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:45:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:45:16,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:45:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 15:45:16,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 15:45:16,294 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:45:16,296 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:45:16,380 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:45:16,384 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:45:16,385 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 15:45:16,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:45:16 BoogieIcfgContainer [2022-12-13 15:45:16,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:45:16,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:45:16,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:45:16,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:45:16,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:45:15" (1/3) ... [2022-12-13 15:45:16,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a4d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:45:16, skipping insertion in model container [2022-12-13 15:45:16,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:45:16" (2/3) ... [2022-12-13 15:45:16,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@629a4d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:45:16, skipping insertion in model container [2022-12-13 15:45:16,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:45:16" (3/3) ... [2022-12-13 15:45:16,393 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.c [2022-12-13 15:45:16,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:45:16,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:45:16,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:45:16,445 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;@76cbc569, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:45:16,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 15:45:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 15:45:16,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:16,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:16,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2022-12-13 15:45:16,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822924509] [2022-12-13 15:45:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:16,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822924509] [2022-12-13 15:45:16,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 15:45:16,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876855528] [2022-12-13 15:45:16,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:16,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:16,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:16,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:45:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 15:45:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:16,625 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 15:45:16,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:45:16,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876855528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:45:16,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:45:16,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:45:16,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945531791] [2022-12-13 15:45:16,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:45:16,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:45:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:45:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:45:16,660 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:16,678 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-12-13 15:45:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:45:16,679 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 15:45:16,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:16,684 INFO L225 Difference]: With dead ends: 39 [2022-12-13 15:45:16,685 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 15:45:16,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:45:16,689 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:45:16,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:45:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 15:45:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-13 15:45:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 15:45:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-13 15:45:16,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-12-13 15:45:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:16,715 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-13 15:45:16,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-13 15:45:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:45:16,716 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:16,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:16,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:45:16,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 15:45:16,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2022-12-13 15:45:16,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:16,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18061604] [2022-12-13 15:45:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:16,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18061604] [2022-12-13 15:45:17,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 15:45:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829031229] [2022-12-13 15:45:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:17,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:17,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:17,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:17,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:45:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:17,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:45:17,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:17,102 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 15:45:17,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:45:17,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829031229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:45:17,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:45:17,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:45:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501244618] [2022-12-13 15:45:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:45:17,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:45:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:45:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:45:17,105 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:17,118 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-13 15:45:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:45:17,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 15:45:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:17,119 INFO L225 Difference]: With dead ends: 26 [2022-12-13 15:45:17,120 INFO L226 Difference]: Without dead ends: 19 [2022-12-13 15:45:17,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:45:17,121 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 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 15:45:17,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:45:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-13 15:45:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-13 15:45:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 15:45:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-13 15:45:17,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2022-12-13 15:45:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:17,126 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-13 15:45:17,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-13 15:45:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:45:17,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:17,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:17,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:45:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:17,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2022-12-13 15:45:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:17,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446347308] [2022-12-13 15:45:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:17,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:45:17,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109278268] [2022-12-13 15:45:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:17,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:17,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:17,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:45:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:45:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:17,526 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 15:45:17,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:45:17,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:17,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446347308] [2022-12-13 15:45:17,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:45:17,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109278268] [2022-12-13 15:45:17,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109278268] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:45:17,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:45:17,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:45:17,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142657832] [2022-12-13 15:45:17,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:45:17,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:45:17,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:17,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:45:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:45:17,529 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:17,617 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-12-13 15:45:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:45:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 15:45:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:17,618 INFO L225 Difference]: With dead ends: 34 [2022-12-13 15:45:17,618 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 15:45:17,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:45:17,620 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:45:17,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 46 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:45:17,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 15:45:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-12-13 15:45:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-12-13 15:45:17,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 10 [2022-12-13 15:45:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:17,627 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-12-13 15:45:17,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:45:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-12-13 15:45:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 15:45:17,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:17,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:17,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:45:17,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:17,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2022-12-13 15:45:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:17,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014215058] [2022-12-13 15:45:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:17,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:17,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:45:17,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006171358] [2022-12-13 15:45:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:17,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:17,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:17,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:17,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:45:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:45:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:17,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:18,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014215058] [2022-12-13 15:45:18,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:45:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006171358] [2022-12-13 15:45:18,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006171358] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:45:18,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:45:18,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-13 15:45:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915979433] [2022-12-13 15:45:18,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:45:18,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:45:18,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:18,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:45:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:45:18,018 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:18,079 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-12-13 15:45:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:45:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-12-13 15:45:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:18,081 INFO L225 Difference]: With dead ends: 62 [2022-12-13 15:45:18,081 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 15:45:18,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:45:18,082 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:45:18,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 86 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:45:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 15:45:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-12-13 15:45:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 15:45:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-12-13 15:45:18,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2022-12-13 15:45:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:18,093 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-12-13 15:45:18,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-12-13 15:45:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 15:45:18,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:18,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:18,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:45:18,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 15:45:18,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2022-12-13 15:45:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:18,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919877632] [2022-12-13 15:45:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:18,330 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:45:18,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110254588] [2022-12-13 15:45:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:18,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:18,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:18,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:18,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:45:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:45:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:18,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:23,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:23,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919877632] [2022-12-13 15:45:23,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:45:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110254588] [2022-12-13 15:45:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110254588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:45:23,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:45:23,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-12-13 15:45:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176011155] [2022-12-13 15:45:23,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:45:23,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:45:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:45:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240 [2022-12-13 15:45:23,454 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:30,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:45:31,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:45:33,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:45:35,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:45:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:36,367 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2022-12-13 15:45:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:45:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-12-13 15:45:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:36,371 INFO L225 Difference]: With dead ends: 88 [2022-12-13 15:45:36,371 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 15:45:36,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=83, Invalid=335, Unknown=2, NotChecked=0, Total=420 [2022-12-13 15:45:36,372 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:45:36,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 84 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-12-13 15:45:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 15:45:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-12-13 15:45:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 15:45:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-12-13 15:45:36,393 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 20 [2022-12-13 15:45:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:36,393 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-12-13 15:45:36,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-12-13 15:45:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 15:45:36,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:36,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:36,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:45:36,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:36,595 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2022-12-13 15:45:36,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:36,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424600143] [2022-12-13 15:45:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:36,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:36,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:45:36,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898791423] [2022-12-13 15:45:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:36,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:36,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:36,603 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:36,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:45:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:36,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:45:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:37,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:45:37,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424600143] [2022-12-13 15:45:37,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:45:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898791423] [2022-12-13 15:45:37,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898791423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:45:37,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:45:37,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-12-13 15:45:37,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177702240] [2022-12-13 15:45:37,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:45:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:45:37,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:45:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:45:37,848 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:38,924 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-12-13 15:45:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:45:38,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-12-13 15:45:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:38,926 INFO L225 Difference]: With dead ends: 115 [2022-12-13 15:45:38,926 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 15:45:38,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-12-13 15:45:38,927 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:45:38,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:45:38,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 15:45:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-12-13 15:45:38,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 15:45:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-12-13 15:45:38,940 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 20 [2022-12-13 15:45:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:38,940 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-12-13 15:45:38,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:45:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-12-13 15:45:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:45:38,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:38,941 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:38,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:45:39,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:39,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:39,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2022-12-13 15:45:39,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674004964] [2022-12-13 15:45:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:39,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:45:39,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269625976] [2022-12-13 15:45:39,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:39,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:39,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:45:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:45:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:45:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:45:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:45:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:45:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674004964] [2022-12-13 15:45:39,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:45:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269625976] [2022-12-13 15:45:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269625976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:45:39,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:45:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-12-13 15:45:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862697468] [2022-12-13 15:45:39,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:45:39,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:45:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:45:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:45:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:45:39,311 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:45:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:45:39,399 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2022-12-13 15:45:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:45:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-12-13 15:45:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:45:39,400 INFO L225 Difference]: With dead ends: 92 [2022-12-13 15:45:39,400 INFO L226 Difference]: Without dead ends: 82 [2022-12-13 15:45:39,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:45:39,401 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:45:39,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 54 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:45:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-13 15:45:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-12-13 15:45:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 15:45:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-12-13 15:45:39,414 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 26 [2022-12-13 15:45:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:45:39,414 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-12-13 15:45:39,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:45:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-12-13 15:45:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 15:45:39,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:45:39,416 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:45:39,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:45:39,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 15:45:39,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:45:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:45:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash -158147061, now seen corresponding path program 1 times [2022-12-13 15:45:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:45:39,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855021685] [2022-12-13 15:45:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:39,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:45:39,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:45:39,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640610198] [2022-12-13 15:45:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:45:39,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:45:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:45:39,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:45:39,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:45:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:45:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 15:45:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:45:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:45:43,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 15:46:01,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:01,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855021685] [2022-12-13 15:46:01,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:46:01,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640610198] [2022-12-13 15:46:01,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640610198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:01,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:46:01,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-12-13 15:46:01,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578100290] [2022-12-13 15:46:01,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:01,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 15:46:01,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 15:46:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=377, Unknown=6, NotChecked=0, Total=462 [2022-12-13 15:46:01,678 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 15:46:04,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:46:05,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:46:09,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:46:34,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:46:40,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:46:50,189 WARN L233 SmtUtils]: Spent 8.90s on a formula simplification. DAG size of input: 50 DAG size of output: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:46:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:46:51,075 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2022-12-13 15:46:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:46:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-12-13 15:46:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:46:51,076 INFO L225 Difference]: With dead ends: 134 [2022-12-13 15:46:51,076 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 15:46:51,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=209, Invalid=971, Unknown=10, NotChecked=0, Total=1190 [2022-12-13 15:46:51,078 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 30 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:46:51,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 190 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 450 Invalid, 2 Unknown, 0 Unchecked, 13.7s Time] [2022-12-13 15:46:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 15:46:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-12-13 15:46:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 108 states have internal predecessors, (121), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 15:46:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2022-12-13 15:46:51,105 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 40 [2022-12-13 15:46:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:46:51,105 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2022-12-13 15:46:51,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 15:46:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2022-12-13 15:46:51,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 15:46:51,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:46:51,107 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:51,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 15:46:51,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:51,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:46:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2022-12-13 15:46:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:51,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129877873] [2022-12-13 15:46:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:51,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:46:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118275624] [2022-12-13 15:46:51,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:46:51,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:51,350 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:51,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:46:51,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:46:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:46:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:46:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:46:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:46:51,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:46:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 15:46:51,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:46:51,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129877873] [2022-12-13 15:46:51,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:46:51,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118275624] [2022-12-13 15:46:51,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118275624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:46:51,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:46:51,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-13 15:46:51,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680466310] [2022-12-13 15:46:51,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:46:51,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:46:51,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:46:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:46:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:46:51,548 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 15:46:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:46:51,698 INFO L93 Difference]: Finished difference Result 310 states and 361 transitions. [2022-12-13 15:46:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:46:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-12-13 15:46:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:46:51,700 INFO L225 Difference]: With dead ends: 310 [2022-12-13 15:46:51,700 INFO L226 Difference]: Without dead ends: 303 [2022-12-13 15:46:51,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:46:51,701 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:46:51,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 174 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:46:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-13 15:46:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 293. [2022-12-13 15:46:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 233 states have (on average 1.1373390557939915) internal successors, (265), 243 states have internal predecessors, (265), 33 states have call successors, (33), 26 states have call predecessors, (33), 26 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2022-12-13 15:46:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 330 transitions. [2022-12-13 15:46:51,726 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 330 transitions. Word has length 50 [2022-12-13 15:46:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:46:51,726 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 330 transitions. [2022-12-13 15:46:51,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 15:46:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 330 transitions. [2022-12-13 15:46:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 15:46:51,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:46:51,728 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:46:51,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 15:46:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:51,929 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:46:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:46:51,931 INFO L85 PathProgramCache]: Analyzing trace with hash -493632277, now seen corresponding path program 2 times [2022-12-13 15:46:51,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:46:51,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635803497] [2022-12-13 15:46:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:46:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:46:51,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:46:51,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707059253] [2022-12-13 15:46:51,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:46:51,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:46:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:46:51,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:46:51,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:46:52,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:46:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:46:52,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 15:46:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 15:47:12,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 15:47:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635803497] [2022-12-13 15:47:42,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:47:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707059253] [2022-12-13 15:47:42,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707059253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:42,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:42,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 27 [2022-12-13 15:47:42,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399927420] [2022-12-13 15:47:42,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:42,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 15:47:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 15:47:42,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=590, Unknown=6, NotChecked=0, Total=702 [2022-12-13 15:47:42,901 INFO L87 Difference]: Start difference. First operand 293 states and 330 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 15:47:45,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:47:52,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:48:04,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:48:29,977 WARN L233 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 123 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:48:31,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:48:33,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:48:35,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:48:55,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:48:58,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:49:13,986 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 102 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:49:17,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 15:49:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:49:17,759 INFO L93 Difference]: Finished difference Result 395 states and 450 transitions. [2022-12-13 15:49:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 15:49:17,759 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-12-13 15:49:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:49:17,761 INFO L225 Difference]: With dead ends: 395 [2022-12-13 15:49:17,762 INFO L226 Difference]: Without dead ends: 393 [2022-12-13 15:49:17,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 96.7s TimeCoverageRelationStatistics Valid=402, Invalid=1843, Unknown=11, NotChecked=0, Total=2256 [2022-12-13 15:49:17,763 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:49:17,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 194 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 487 Invalid, 3 Unknown, 0 Unchecked, 23.2s Time] [2022-12-13 15:49:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-13 15:49:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2022-12-13 15:49:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 312 states have (on average 1.1378205128205128) internal successors, (355), 321 states have internal predecessors, (355), 43 states have call successors, (43), 34 states have call predecessors, (43), 34 states have return successors, (42), 34 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-13 15:49:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 440 transitions. [2022-12-13 15:49:17,809 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 440 transitions. Word has length 50 [2022-12-13 15:49:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:49:17,810 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 440 transitions. [2022-12-13 15:49:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 15:49:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 440 transitions. [2022-12-13 15:49:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 15:49:17,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:49:17,812 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:17,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 15:49:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:49:18,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:49:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash 464801805, now seen corresponding path program 3 times [2022-12-13 15:49:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:49:18,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927455423] [2022-12-13 15:49:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:18,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:49:18,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:49:18,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130170354] [2022-12-13 15:49:18,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:49:18,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:49:18,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:49:18,042 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:49:18,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:49:18,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 15:49:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:49:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 15:49:18,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 21 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 15:49:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 57 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 15:49:21,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:49:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927455423] [2022-12-13 15:49:21,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:49:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130170354] [2022-12-13 15:49:21,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130170354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:21,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:49:21,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-12-13 15:49:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714870011] [2022-12-13 15:49:21,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:21,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:49:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:49:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:49:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 15:49:21,587 INFO L87 Difference]: Start difference. First operand 390 states and 440 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 15:49:25,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 15:49:32,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 15:49:34,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 15:49:37,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 15:49:46,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 15:49:53,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-13 15:49:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:49:53,825 INFO L93 Difference]: Finished difference Result 447 states and 502 transitions. [2022-12-13 15:49:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 15:49:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 60 [2022-12-13 15:49:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:49:53,828 INFO L225 Difference]: With dead ends: 447 [2022-12-13 15:49:53,828 INFO L226 Difference]: Without dead ends: 443 [2022-12-13 15:49:53,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=662, Invalid=2094, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 15:49:53,830 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:49:53,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 105 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 14.5s Time] [2022-12-13 15:49:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-12-13 15:49:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 111. [2022-12-13 15:49:53,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 15:49:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-12-13 15:49:53,853 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 60 [2022-12-13 15:49:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:49:53,853 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-12-13 15:49:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 15:49:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-12-13 15:49:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-13 15:49:53,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:49:53,854 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:53,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:49:54,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:49:54,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:49:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash -401903931, now seen corresponding path program 3 times [2022-12-13 15:49:54,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:49:54,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749897733] [2022-12-13 15:49:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:54,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:49:54,073 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:49:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967194153] [2022-12-13 15:49:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:49:54,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:49:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:49:54,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:49:54,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:49:54,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 15:49:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:49:54,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 15:49:54,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:49:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:49:54,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:49:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-13 15:49:54,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:49:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749897733] [2022-12-13 15:49:54,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:49:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967194153] [2022-12-13 15:49:54,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967194153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:49:54,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:49:54,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-12-13 15:49:54,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130908271] [2022-12-13 15:49:54,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:49:54,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:49:54,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:49:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:49:54,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:49:54,507 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-12-13 15:49:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:49:54,844 INFO L93 Difference]: Finished difference Result 216 states and 245 transitions. [2022-12-13 15:49:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 15:49:54,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 110 [2022-12-13 15:49:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:49:54,848 INFO L225 Difference]: With dead ends: 216 [2022-12-13 15:49:54,848 INFO L226 Difference]: Without dead ends: 211 [2022-12-13 15:49:54,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 15:49:54,849 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 146 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:49:54,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 255 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:49:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-13 15:49:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-12-13 15:49:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 169 states have (on average 1.1242603550295858) internal successors, (190), 169 states have internal predecessors, (190), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-13 15:49:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 231 transitions. [2022-12-13 15:49:54,873 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 231 transitions. Word has length 110 [2022-12-13 15:49:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:49:54,873 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 231 transitions. [2022-12-13 15:49:54,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-12-13 15:49:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 231 transitions. [2022-12-13 15:49:54,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-13 15:49:54,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:49:54,875 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:49:54,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:49:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 15:49:55,077 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:49:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:49:55,078 INFO L85 PathProgramCache]: Analyzing trace with hash 141809069, now seen corresponding path program 4 times [2022-12-13 15:49:55,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:49:55,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183121398] [2022-12-13 15:49:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:49:55,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:49:55,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:49:55,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407882785] [2022-12-13 15:49:55,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:49:55,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:49:55,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:49:55,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:49:55,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:50:26,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:50:26,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-13 15:50:26,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:50:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:50:26,393 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:50:26,393 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:50:26,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 15:50:26,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 15:50:26,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:50:26,605 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:26,615 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 15:50:26,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 03:50:26 BoogieIcfgContainer [2022-12-13 15:50:26,679 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 15:50:26,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 15:50:26,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 15:50:26,680 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 15:50:26,680 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:45:16" (3/4) ... [2022-12-13 15:50:26,681 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 15:50:26,732 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 15:50:26,732 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 15:50:26,733 INFO L158 Benchmark]: Toolchain (without parser) took 310776.27ms. Allocated memory is still 134.2MB. Free memory was 99.4MB in the beginning and 32.5MB in the end (delta: 66.9MB). Peak memory consumption was 68.7MB. Max. memory is 16.1GB. [2022-12-13 15:50:26,733 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:50:26,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.50ms. Allocated memory is still 134.2MB. Free memory was 99.4MB in the beginning and 89.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:50:26,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.50ms. Allocated memory is still 134.2MB. Free memory was 89.0MB in the beginning and 87.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:50:26,734 INFO L158 Benchmark]: Boogie Preprocessor took 14.85ms. Allocated memory is still 134.2MB. Free memory was 87.7MB in the beginning and 86.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 15:50:26,734 INFO L158 Benchmark]: RCFGBuilder took 207.96ms. Allocated memory is still 134.2MB. Free memory was 86.6MB in the beginning and 76.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:50:26,734 INFO L158 Benchmark]: TraceAbstraction took 310291.39ms. Allocated memory is still 134.2MB. Free memory was 75.7MB in the beginning and 41.0MB in the end (delta: 34.7MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2022-12-13 15:50:26,734 INFO L158 Benchmark]: Witness Printer took 52.95ms. Allocated memory is still 134.2MB. Free memory was 41.0MB in the beginning and 32.5MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 15:50:26,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 111.1MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 179.50ms. Allocated memory is still 134.2MB. Free memory was 99.4MB in the beginning and 89.0MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.50ms. Allocated memory is still 134.2MB. Free memory was 89.0MB in the beginning and 87.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.85ms. Allocated memory is still 134.2MB. Free memory was 87.7MB in the beginning and 86.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 207.96ms. Allocated memory is still 134.2MB. Free memory was 86.6MB in the beginning and 76.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 310291.39ms. Allocated memory is still 134.2MB. Free memory was 75.7MB in the beginning and 41.0MB in the end (delta: 34.7MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. * Witness Printer took 52.95ms. Allocated memory is still 134.2MB. Free memory was 41.0MB in the beginning and 32.5MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) [L29] x = a [L30] y = b [L31] z = 0 VAL [a=-2, b=2097151, counter=0, x=-2, y=2097151, z=0] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=1, counter++=0, x=-2, y=2097151, z=0] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=1, x=-2, y=2097151, z=0] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=1, x=-2, y=2097151, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=1, x=-2, y=2097150, z=-2] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=1, x=-4, y=1048575, z=-2] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=2, counter++=1, x=-4, y=1048575, z=-2] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=2] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=2, x=-4, y=1048575, z=-2] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=2, x=-4, y=1048575, z=-2] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=2, x=-4, y=1048574, z=-6] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=2, x=-8, y=524287, z=-6] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=3, counter++=2, x=-8, y=524287, z=-6] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=3] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=3, x=-8, y=524287, z=-6] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=3, x=-8, y=524287, z=-6] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=3, x=-8, y=524286, z=-14] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=3, x=-16, y=262143, z=-14] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=4, counter++=3, x=-16, y=262143, z=-14] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=4] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=4, x=-16, y=262143, z=-14] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=4, x=-16, y=262143, z=-14] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=4, x=-16, y=262142, z=-30] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=4, x=-32, y=131071, z=-30] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=5, counter++=4, x=-32, y=131071, z=-30] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=5] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=5, x=-32, y=131071, z=-30] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=5, x=-32, y=131071, z=-30] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=5, x=-32, y=131070, z=-62] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=5, x=-64, y=65535, z=-62] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=6, counter++=5, x=-64, y=65535, z=-62] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=6] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=6, x=-64, y=65535, z=-62] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=6, x=-64, y=65535, z=-62] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=6, x=-64, y=65534, z=-126] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=6, x=-128, y=32767, z=-126] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=7, counter++=6, x=-128, y=32767, z=-126] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=7] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=7, x=-128, y=32767, z=-126] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=7, x=-128, y=32767, z=-126] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=7, x=-128, y=32766, z=-254] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=7, x=-256, y=16383, z=-254] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=8, counter++=7, x=-256, y=16383, z=-254] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=8] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=8, x=-256, y=16383, z=-254] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=8, x=-256, y=16383, z=-254] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=8, x=-256, y=16382, z=-510] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=8, x=-512, y=8191, z=-510] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=9, counter++=8, x=-512, y=8191, z=-510] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=9] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=9, x=-512, y=8191, z=-510] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=9, x=-512, y=8191, z=-510] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=9, x=-512, y=8190, z=-1022] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=9, x=-1024, y=4095, z=-1022] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=10, counter++=9, x=-1024, y=4095, z=-1022] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=10] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=10, x=-1024, y=4095, z=-1022] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=10, x=-1024, y=4095, z=-1022] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=10, x=-1024, y=4094, z=-2046] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=10, x=-2048, y=2047, z=-2046] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=11, counter++=10, x=-2048, y=2047, z=-2046] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=11] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=11, x=-2048, y=2047, z=-2046] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=11, x=-2048, y=2047, z=-2046] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=11, x=-2048, y=2046, z=-4094] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=11, x=-4096, y=1023, z=-4094] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=12, counter++=11, x=-4096, y=1023, z=-4094] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=12] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=12, x=-4096, y=1023, z=-4094] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=12, x=-4096, y=1023, z=-4094] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=12, x=-4096, y=1022, z=-8190] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=12, x=-8192, y=511, z=-8190] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=13, counter++=12, x=-8192, y=511, z=-8190] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=13] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=13, x=-8192, y=511, z=-8190] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=13, x=-8192, y=511, z=-8190] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=13, x=-8192, y=510, z=-16382] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=13, x=-16384, y=255, z=-16382] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=14, counter++=13, x=-16384, y=255, z=-16382] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=14] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=14, x=-16384, y=255, z=-16382] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=14, x=-16384, y=255, z=-16382] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=14, x=-16384, y=254, z=-32766] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=14, x=-32768, y=127, z=-32766] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=15, counter++=14, x=-32768, y=127, z=-32766] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=15] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=15, x=-32768, y=127, z=-32766] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=15, x=-32768, y=127, z=-32766] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=15, x=-32768, y=126, z=-65534] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=15, x=-65536, y=63, z=-65534] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=16, counter++=15, x=-65536, y=63, z=-65534] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=16] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=16, x=-65536, y=63, z=-65534] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=16, x=-65536, y=63, z=-65534] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=16, x=-65536, y=62, z=-131070] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=16, x=-131072, y=31, z=-131070] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=17, counter++=16, x=-131072, y=31, z=-131070] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=17] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=17, x=-131072, y=31, z=-131070] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=17, x=-131072, y=31, z=-131070] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=17, x=-131072, y=30, z=-262142] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=17, x=-262144, y=15, z=-262142] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=18, counter++=17, x=-262144, y=15, z=-262142] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=18] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=18, x=-262144, y=15, z=-262142] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=18, x=-262144, y=15, z=-262142] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=18, x=-262144, y=14, z=-524286] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=18, x=-524288, y=7, z=-524286] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=19, counter++=18, x=-524288, y=7, z=-524286] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=19] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=19, x=-524288, y=7, z=-524286] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=19, x=-524288, y=7, z=-524286] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=19, x=-524288, y=6, z=-1048574] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=19, x=-1048576, y=3, z=-1048574] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=20, counter++=19, x=-1048576, y=3, z=-1048574] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, counter=20] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [a=-2, b=2097151, counter=20, x=-1048576, y=3, z=-1048574] [L35] COND FALSE !(!(y != 0)) VAL [a=-2, b=2097151, counter=20, x=-1048576, y=3, z=-1048574] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [a=-2, b=2097151, counter=20, x=-1048576, y=2, z=-2097150] [L42] x = 2 * x [L43] y = y / 2 VAL [a=-2, b=2097151, counter=20, x=-2097152, y=1, z=-2097150] [L33] EXPR counter++ VAL [a=-2, b=2097151, counter=21, counter++=20, x=-2097152, y=1, z=-2097150] [L33] COND FALSE !(counter++<20) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, counter=21] [L13] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L15] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 310.2s, OverallIterations: 13, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 191.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 617 SdHoareTripleChecker+Valid, 60.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 615 mSDsluCounter, 1347 SdHoareTripleChecker+Invalid, 60.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1111 mSDsCounter, 271 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1883 IncrementalHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 271 mSolverCounterUnsat, 236 mSDtfsCounter, 1883 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 915 GetRequests, 642 SyntacticMatches, 4 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 182.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=10, InterpolantAutomatonStates: 197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 383 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 31.4s SatisfiabilityAnalysisTime, 83.4s InterpolantComputationTime, 654 NumberOfCodeBlocks, 654 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 800 ConstructedInterpolants, 5 QuantifiedInterpolants, 6840 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1384 ConjunctsInSsa, 244 ConjunctsInUnsatCore, 21 InterpolantComputations, 3 PerfectInterpolantSequences, 574/1684 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 15:50:26,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8d741e0-f0f6-4776-9349-cc14e9b791a0/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE