./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ --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 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e --- 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-dbf71c6-m [2022-10-17 11:06:16,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:06:16,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:06:16,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:06:16,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:06:16,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:06:16,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:06:16,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:06:16,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:06:16,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:06:16,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:06:16,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:06:16,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:06:16,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:06:16,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:06:16,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:06:16,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:06:16,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:06:16,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:06:16,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:06:16,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:06:16,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:06:16,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:06:16,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:06:16,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:06:16,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:06:16,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:06:16,191 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:06:16,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:06:16,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:06:16,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:06:16,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:06:16,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:06:16,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:06:16,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:06:16,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:06:16,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:06:16,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:06:16,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:06:16,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:06:16,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:06:16,210 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:06:16,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:06:16,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:06:16,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:06:16,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:06:16,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:06:16,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:06:16,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:06:16,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:06:16,266 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:06:16,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:06:16,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:06:16,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:06:16,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:06:16,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:06:16,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:06:16,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:06:16,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:06:16,271 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:06:16,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:06:16,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:06:16,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:06:16,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:06:16,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:06:16,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:06:16,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:06:16,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:06:16,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:06:16,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:06:16,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:06:16,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:06:16,275 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:06:16,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:06:16,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:06:16,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68585835b92043bfb2f3c62590e96ff685993869f8a251aecd9fe4c8aaea0e1e [2022-10-17 11:06:16,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:06:16,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:06:16,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:06:16,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:06:16,729 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:06:16,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-10-17 11:06:16,817 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/data/6891a495b/1567942432074551acae9d15cb4bd46c/FLAG20a01198e [2022-10-17 11:06:17,340 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:06:17,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i [2022-10-17 11:06:17,353 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/data/6891a495b/1567942432074551acae9d15cb4bd46c/FLAG20a01198e [2022-10-17 11:06:17,683 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/data/6891a495b/1567942432074551acae9d15cb4bd46c [2022-10-17 11:06:17,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:06:17,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:06:17,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:06:17,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:06:17,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:06:17,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:06:17" (1/1) ... [2022-10-17 11:06:17,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f420254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:17, skipping insertion in model container [2022-10-17 11:06:17,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:06:17" (1/1) ... [2022-10-17 11:06:17,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:06:17,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:06:17,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-10-17 11:06:18,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:06:18,014 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:06:18,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-1.i[820,833] [2022-10-17 11:06:18,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:06:18,054 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:06:18,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18 WrapperNode [2022-10-17 11:06:18,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:06:18,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:06:18,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:06:18,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:06:18,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,099 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2022-10-17 11:06:18,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:06:18,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:06:18,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:06:18,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:06:18,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,131 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:06:18,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:06:18,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:06:18,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:06:18,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (1/1) ... [2022-10-17 11:06:18,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:06:18,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:18,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:06:18,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:06:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:06:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:06:18,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 11:06:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:06:18,330 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:06:18,332 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:06:18,594 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:06:18,601 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:06:18,601 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-10-17 11:06:18,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:06:18 BoogieIcfgContainer [2022-10-17 11:06:18,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:06:18,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:06:18,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:06:18,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:06:18,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:06:17" (1/3) ... [2022-10-17 11:06:18,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ed77dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:06:18, skipping insertion in model container [2022-10-17 11:06:18,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:06:18" (2/3) ... [2022-10-17 11:06:18,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ed77dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:06:18, skipping insertion in model container [2022-10-17 11:06:18,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:06:18" (3/3) ... [2022-10-17 11:06:18,635 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2022-10-17 11:06:18,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:06:18,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:06:18,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:06:18,767 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;@125ec2f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:06:18,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 11:06:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 11:06:18,787 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:18,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:18,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:18,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2022-10-17 11:06:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793405368] [2022-10-17 11:06:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:18,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:06:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793405368] [2022-10-17 11:06:19,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793405368] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:06:19,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:06:19,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:06:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486327025] [2022-10-17 11:06:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:06:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:06:19,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:06:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:06:19,141 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:19,176 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2022-10-17 11:06:19,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:06:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 11:06:19,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:19,189 INFO L225 Difference]: With dead ends: 42 [2022-10-17 11:06:19,190 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 11:06:19,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:06:19,198 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:19,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:06:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 11:06:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-10-17 11:06:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-10-17 11:06:19,239 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-10-17 11:06:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:19,240 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-10-17 11:06:19,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-10-17 11:06:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 11:06:19,241 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:19,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:19,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:06:19,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2022-10-17 11:06:19,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430243721] [2022-10-17 11:06:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:19,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:06:19,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:19,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430243721] [2022-10-17 11:06:19,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430243721] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:19,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973556300] [2022-10-17 11:06:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:19,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:19,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:19,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 11:06:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:06:19,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:06:19,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:06:19,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973556300] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:06:19,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:06:19,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 11:06:19,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967858766] [2022-10-17 11:06:19,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:06:19,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:06:19,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:19,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:06:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:06:19,583 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:19,598 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-10-17 11:06:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:06:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 11:06:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:19,603 INFO L225 Difference]: With dead ends: 32 [2022-10-17 11:06:19,603 INFO L226 Difference]: Without dead ends: 23 [2022-10-17 11:06:19,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:06:19,606 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:19,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:06:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-10-17 11:06:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-10-17 11:06:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-10-17 11:06:19,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-10-17 11:06:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:19,615 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-10-17 11:06:19,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-10-17 11:06:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 11:06:19,616 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:19,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:19,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:19,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:19,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2022-10-17 11:06:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:19,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462841856] [2022-10-17 11:06:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:06:19,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462841856] [2022-10-17 11:06:19,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462841856] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:19,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739149073] [2022-10-17 11:06:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:19,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:19,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:19,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 11:06:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:20,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 11:06:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 11:06:20,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 11:06:20,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739149073] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:06:20,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 11:06:20,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 11:06:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682177360] [2022-10-17 11:06:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:06:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:06:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:06:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:06:20,055 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:20,079 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-10-17 11:06:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:06:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 11:06:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:20,082 INFO L225 Difference]: With dead ends: 44 [2022-10-17 11:06:20,083 INFO L226 Difference]: Without dead ends: 27 [2022-10-17 11:06:20,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:06:20,085 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 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 [2022-10-17 11:06:20,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:06:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-17 11:06:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-10-17 11:06:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-10-17 11:06:20,095 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2022-10-17 11:06:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:20,095 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-10-17 11:06:20,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-10-17 11:06:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 11:06:20,097 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:20,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:20,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:20,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:20,298 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2022-10-17 11:06:20,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402360967] [2022-10-17 11:06:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 11:06:20,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402360967] [2022-10-17 11:06:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402360967] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:20,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357994776] [2022-10-17 11:06:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:20,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:20,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:20,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:20,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 11:06:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 11:06:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 11:06:20,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 11:06:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357994776] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:20,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:20,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-17 11:06:20,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911321771] [2022-10-17 11:06:20,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:20,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 11:06:20,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 11:06:20,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:06:20,705 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:20,763 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-10-17 11:06:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 11:06:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 11:06:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:20,768 INFO L225 Difference]: With dead ends: 49 [2022-10-17 11:06:20,768 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 11:06:20,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-17 11:06:20,774 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:20,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 59 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:06:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 11:06:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-17 11:06:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-10-17 11:06:20,789 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-10-17 11:06:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:20,789 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-10-17 11:06:20,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-10-17 11:06:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 11:06:20,791 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:20,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:20,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:21,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:21,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1612157157, now seen corresponding path program 2 times [2022-10-17 11:06:21,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:21,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428977121] [2022-10-17 11:06:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:21,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 11:06:21,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428977121] [2022-10-17 11:06:21,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428977121] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997999099] [2022-10-17 11:06:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:06:21,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:21,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:21,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 11:06:21,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:06:21,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:06:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 11:06:21,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 11:06:21,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 11:06:21,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997999099] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:21,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:21,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-10-17 11:06:21,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838640263] [2022-10-17 11:06:21,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:21,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 11:06:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 11:06:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:06:21,484 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:21,598 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2022-10-17 11:06:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 11:06:21,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 11:06:21,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:21,607 INFO L225 Difference]: With dead ends: 70 [2022-10-17 11:06:21,608 INFO L226 Difference]: Without dead ends: 51 [2022-10-17 11:06:21,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-17 11:06:21,609 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:21,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:06:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-17 11:06:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-10-17 11:06:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-10-17 11:06:21,638 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 23 [2022-10-17 11:06:21,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:21,639 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-10-17 11:06:21,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-10-17 11:06:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 11:06:21,643 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:21,643 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:21,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:21,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:21,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1679231593, now seen corresponding path program 3 times [2022-10-17 11:06:21,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:21,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948247899] [2022-10-17 11:06:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:21,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 11:06:22,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:22,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948247899] [2022-10-17 11:06:22,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948247899] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:22,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634019699] [2022-10-17 11:06:22,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 11:06:22,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:22,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:22,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 11:06:22,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 11:06:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:06:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 11:06:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 11:06:22,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-10-17 11:06:22,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634019699] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:22,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:22,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-10-17 11:06:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248413127] [2022-10-17 11:06:22,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:22,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 11:06:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 11:06:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:06:22,289 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:22,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:22,358 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2022-10-17 11:06:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 11:06:22,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-10-17 11:06:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:22,374 INFO L225 Difference]: With dead ends: 94 [2022-10-17 11:06:22,374 INFO L226 Difference]: Without dead ends: 71 [2022-10-17 11:06:22,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-10-17 11:06:22,376 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:22,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 58 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 11:06:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-17 11:06:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-10-17 11:06:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-10-17 11:06:22,392 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 38 [2022-10-17 11:06:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:22,392 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-10-17 11:06:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-10-17 11:06:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 11:06:22,395 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:22,395 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:22,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:22,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:22,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1555127913, now seen corresponding path program 4 times [2022-10-17 11:06:22,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399462148] [2022-10-17 11:06:22,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 11:06:22,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399462148] [2022-10-17 11:06:22,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399462148] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:22,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276568802] [2022-10-17 11:06:22,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 11:06:22,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:22,937 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:22,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 11:06:23,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 11:06:23,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:06:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 11:06:23,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 11:06:23,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 11:06:23,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276568802] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:23,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:23,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-10-17 11:06:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055067345] [2022-10-17 11:06:23,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:23,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 11:06:23,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:23,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 11:06:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-17 11:06:23,437 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:23,561 INFO L93 Difference]: Finished difference Result 143 states and 186 transitions. [2022-10-17 11:06:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 11:06:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-10-17 11:06:23,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:23,563 INFO L225 Difference]: With dead ends: 143 [2022-10-17 11:06:23,564 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 11:06:23,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-10-17 11:06:23,567 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:23,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 78 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 11:06:23,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 11:06:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-10-17 11:06:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:23,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-10-17 11:06:23,593 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 50 [2022-10-17 11:06:23,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:23,594 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-10-17 11:06:23,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:23,594 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-10-17 11:06:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 11:06:23,604 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:23,604 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:23,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 11:06:23,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2132388991, now seen corresponding path program 5 times [2022-10-17 11:06:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510370343] [2022-10-17 11:06:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 11:06:24,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:24,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510370343] [2022-10-17 11:06:24,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510370343] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:24,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264151126] [2022-10-17 11:06:24,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 11:06:24,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:24,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:24,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:24,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 11:06:25,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-10-17 11:06:25,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:06:25,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 11:06:25,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-10-17 11:06:25,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-10-17 11:06:26,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264151126] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:26,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:26,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-10-17 11:06:26,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899132718] [2022-10-17 11:06:26,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-17 11:06:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:26,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-17 11:06:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-10-17 11:06:26,091 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:26,305 INFO L93 Difference]: Finished difference Result 194 states and 258 transitions. [2022-10-17 11:06:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-10-17 11:06:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-10-17 11:06:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:26,309 INFO L225 Difference]: With dead ends: 194 [2022-10-17 11:06:26,310 INFO L226 Difference]: Without dead ends: 146 [2022-10-17 11:06:26,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-10-17 11:06:26,312 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:26,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 123 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:06:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-10-17 11:06:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-10-17 11:06:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2291666666666667) internal successors, (177), 144 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:26,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2022-10-17 11:06:26,346 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 74 [2022-10-17 11:06:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:26,347 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2022-10-17 11:06:26,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 39 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2022-10-17 11:06:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 11:06:26,353 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:26,353 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:26,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-17 11:06:26,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:26,579 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -478169085, now seen corresponding path program 6 times [2022-10-17 11:06:26,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:26,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320420262] [2022-10-17 11:06:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-10-17 11:06:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320420262] [2022-10-17 11:06:27,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320420262] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884526209] [2022-10-17 11:06:27,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 11:06:27,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:27,613 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:27,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 11:06:27,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-10-17 11:06:27,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:06:27,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-17 11:06:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:28,398 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 11:06:28,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-10-17 11:06:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 72 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2022-10-17 11:06:28,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:28,816 INFO L356 Elim1Store]: treesize reduction 15, result has 63.4 percent of original size [2022-10-17 11:06:28,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 34 [2022-10-17 11:06:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-10-17 11:06:28,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884526209] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:28,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:28,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 8] total 39 [2022-10-17 11:06:28,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947405772] [2022-10-17 11:06:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:28,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-10-17 11:06:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-10-17 11:06:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2022-10-17 11:06:28,897 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:30,032 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2022-10-17 11:06:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-10-17 11:06:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-10-17 11:06:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:30,034 INFO L225 Difference]: With dead ends: 263 [2022-10-17 11:06:30,034 INFO L226 Difference]: Without dead ends: 167 [2022-10-17 11:06:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2022-10-17 11:06:30,044 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:30,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 185 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 11:06:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-10-17 11:06:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 150. [2022-10-17 11:06:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.221476510067114) internal successors, (182), 149 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 182 transitions. [2022-10-17 11:06:30,064 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 182 transitions. Word has length 100 [2022-10-17 11:06:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:30,065 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 182 transitions. [2022-10-17 11:06:30,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2022-10-17 11:06:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-10-17 11:06:30,067 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:30,067 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:30,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:30,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:30,295 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:30,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1178743045, now seen corresponding path program 1 times [2022-10-17 11:06:30,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:30,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031214633] [2022-10-17 11:06:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-10-17 11:06:31,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:31,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031214633] [2022-10-17 11:06:31,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031214633] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:31,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684212437] [2022-10-17 11:06:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:31,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:31,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:31,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:31,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 11:06:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-17 11:06:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-10-17 11:06:31,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-10-17 11:06:32,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684212437] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:32,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:32,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-10-17 11:06:32,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972922913] [2022-10-17 11:06:32,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:32,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-10-17 11:06:32,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-10-17 11:06:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 11:06:32,828 INFO L87 Difference]: Start difference. First operand 150 states and 182 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:33,053 INFO L93 Difference]: Finished difference Result 301 states and 390 transitions. [2022-10-17 11:06:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-10-17 11:06:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-10-17 11:06:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:33,057 INFO L225 Difference]: With dead ends: 301 [2022-10-17 11:06:33,057 INFO L226 Difference]: Without dead ends: 202 [2022-10-17 11:06:33,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-10-17 11:06:33,062 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:33,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 78 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 11:06:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-10-17 11:06:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-10-17 11:06:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.164179104477612) internal successors, (234), 201 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2022-10-17 11:06:33,081 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 106 [2022-10-17 11:06:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:33,082 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2022-10-17 11:06:33,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2022-10-17 11:06:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-10-17 11:06:33,091 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:33,092 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:33,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:33,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:33,307 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -619301457, now seen corresponding path program 2 times [2022-10-17 11:06:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:33,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433592109] [2022-10-17 11:06:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:06:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-10-17 11:06:36,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:06:36,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433592109] [2022-10-17 11:06:36,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433592109] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 11:06:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522578172] [2022-10-17 11:06:36,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 11:06:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:06:36,541 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 11:06:36,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 11:06:36,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 11:06:36,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 11:06:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 52 conjunts are in the unsatisfiable core [2022-10-17 11:06:36,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 11:06:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-10-17 11:06:36,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 11:06:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2022-10-17 11:06:40,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522578172] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 11:06:40,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 11:06:40,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-10-17 11:06:40,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712580666] [2022-10-17 11:06:40,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 11:06:40,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-10-17 11:06:40,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:06:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-10-17 11:06:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-10-17 11:06:40,810 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 11:06:41,281 INFO L93 Difference]: Finished difference Result 405 states and 520 transitions. [2022-10-17 11:06:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-10-17 11:06:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-10-17 11:06:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 11:06:41,285 INFO L225 Difference]: With dead ends: 405 [2022-10-17 11:06:41,285 INFO L226 Difference]: Without dead ends: 306 [2022-10-17 11:06:41,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-10-17 11:06:41,292 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 153 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 11:06:41,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 116 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 11:06:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-10-17 11:06:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2022-10-17 11:06:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1081967213114754) internal successors, (338), 305 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 338 transitions. [2022-10-17 11:06:41,313 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 338 transitions. Word has length 158 [2022-10-17 11:06:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 11:06:41,314 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 338 transitions. [2022-10-17 11:06:41,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.123809523809524) internal successors, (223), 105 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 11:06:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 338 transitions. [2022-10-17 11:06:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-10-17 11:06:41,320 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 11:06:41,320 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:06:41,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 11:06:41,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0e94ac-cd2e-4e31-a41f-c3ecc8151d92/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 11:06:41,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:06:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:06:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -535466729, now seen corresponding path program 3 times [2022-10-17 11:06:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:06:41,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077266959] [2022-10-17 11:06:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:06:41,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:06:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat