./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_flag-2.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_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/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_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/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_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/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 4547628201bbb61f481f84914c46868091db8c6a3d0c4d8890951b495ae3c7da --- 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 10:10:45,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:10:45,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:10:45,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:10:45,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:10:45,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:10:45,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:10:45,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:10:45,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:10:45,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:10:45,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:10:45,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:10:45,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:10:45,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:10:45,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:10:45,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:10:45,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:10:45,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:10:45,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:10:45,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:10:45,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:10:45,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:10:45,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:10:45,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:10:45,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:10:45,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:10:45,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:10:45,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:10:45,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:10:45,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:10:45,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:10:45,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:10:45,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:10:45,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:10:45,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:10:45,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:10:45,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:10:45,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:10:45,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:10:45,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:10:45,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:10:45,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:10:45,297 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:10:45,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:10:45,298 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:10:45,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:10:45,299 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:10:45,299 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:10:45,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:10:45,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:10:45,301 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:10:45,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:10:45,301 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:10:45,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:10:45,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:10:45,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:10:45,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:10:45,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:10:45,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:10:45,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:10:45,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:10:45,304 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:10:45,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:10:45,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:10:45,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:10:45,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:10:45,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:10:45,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:10:45,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:10:45,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:10:45,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:10:45,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:10:45,307 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:10:45,307 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:10:45,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:10:45,308 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_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4547628201bbb61f481f84914c46868091db8c6a3d0c4d8890951b495ae3c7da [2022-10-17 10:10:45,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:10:45,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:10:45,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:10:45,645 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:10:45,646 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:10:45,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/list-properties/list_flag-2.i [2022-10-17 10:10:45,723 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/data/2acbe312b/86c0015e4a684aa2a535b9f8a5fbfc80/FLAG2a42f3a07 [2022-10-17 10:10:46,318 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:10:46,319 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/sv-benchmarks/c/list-properties/list_flag-2.i [2022-10-17 10:10:46,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/data/2acbe312b/86c0015e4a684aa2a535b9f8a5fbfc80/FLAG2a42f3a07 [2022-10-17 10:10:46,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/data/2acbe312b/86c0015e4a684aa2a535b9f8a5fbfc80 [2022-10-17 10:10:46,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:10:46,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:10:46,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:10:46,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:10:46,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:10:46,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:10:46" (1/1) ... [2022-10-17 10:10:46,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444cebdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:46, skipping insertion in model container [2022-10-17 10:10:46,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:10:46" (1/1) ... [2022-10-17 10:10:46,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:10:46,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:10:47,069 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_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2022-10-17 10:10:47,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:10:47,090 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:10:47,160 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_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2022-10-17 10:10:47,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:10:47,198 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:10:47,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47 WrapperNode [2022-10-17 10:10:47,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:10:47,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:10:47,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:10:47,200 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:10:47,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,261 INFO L138 Inliner]: procedures = 124, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2022-10-17 10:10:47,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:10:47,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:10:47,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:10:47,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:10:47,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,289 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:10:47,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:10:47,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:10:47,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:10:47,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (1/1) ... [2022-10-17 10:10:47,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:10:47,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:47,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:10:47,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:10:47,401 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-10-17 10:10:47,401 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-10-17 10:10:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:10:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:10:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:10:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:10:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:10:47,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:10:47,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:10:47,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:10:47,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:10:47,511 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:10:47,514 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:10:47,577 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-10-17 10:10:47,775 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:10:47,788 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:10:47,791 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:10:47,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:10:47 BoogieIcfgContainer [2022-10-17 10:10:47,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:10:47,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:10:47,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:10:47,801 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:10:47,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:10:46" (1/3) ... [2022-10-17 10:10:47,803 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee530b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:10:47, skipping insertion in model container [2022-10-17 10:10:47,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:10:47" (2/3) ... [2022-10-17 10:10:47,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee530b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:10:47, skipping insertion in model container [2022-10-17 10:10:47,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:10:47" (3/3) ... [2022-10-17 10:10:47,806 INFO L112 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2022-10-17 10:10:47,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:10:47,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:10:47,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:10:47,895 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;@78f17ea3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:10:47,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:10:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:10:47,908 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:47,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:47,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash 943582971, now seen corresponding path program 1 times [2022-10-17 10:10:47,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344601777] [2022-10-17 10:10:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:48,086 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 10:10:48,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344601777] [2022-10-17 10:10:48,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344601777] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:48,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:48,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:10:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140083299] [2022-10-17 10:10:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:48,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:10:48,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:48,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:10:48,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:10:48,153 INFO L87 Difference]: Start difference. First operand has 27 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:48,173 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2022-10-17 10:10:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:10:48,175 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:10:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:48,183 INFO L225 Difference]: With dead ends: 40 [2022-10-17 10:10:48,183 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 10:10:48,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:10:48,191 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:48,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:10:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 10:10:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-10-17 10:10:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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 10:10:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-10-17 10:10:48,248 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-10-17 10:10:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:48,249 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-10-17 10:10:48,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:48,250 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-10-17 10:10:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:10:48,251 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:48,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:10:48,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 267820561, now seen corresponding path program 1 times [2022-10-17 10:10:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:48,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107062913] [2022-10-17 10:10:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:48,628 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 10:10:48,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:48,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107062913] [2022-10-17 10:10:48,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107062913] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:48,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:48,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:10:48,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280770399] [2022-10-17 10:10:48,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:48,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:10:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:48,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:10:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:10:48,633 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 10:10:48,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:48,734 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-10-17 10:10:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:10:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2022-10-17 10:10:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:48,736 INFO L225 Difference]: With dead ends: 44 [2022-10-17 10:10:48,736 INFO L226 Difference]: Without dead ends: 40 [2022-10-17 10:10:48,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:10:48,738 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:48,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:10:48,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-17 10:10:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2022-10-17 10:10:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-10-17 10:10:48,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2022-10-17 10:10:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:48,748 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-10-17 10:10:48,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 10:10:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-10-17 10:10:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 10:10:48,749 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:48,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:48,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:10:48,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:48,751 INFO L85 PathProgramCache]: Analyzing trace with hash -273802420, now seen corresponding path program 1 times [2022-10-17 10:10:48,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:48,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588942176] [2022-10-17 10:10:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:48,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:48,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:48,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588942176] [2022-10-17 10:10:48,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588942176] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:48,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:48,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:10:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433491901] [2022-10-17 10:10:48,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:48,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:10:48,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:10:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:10:48,931 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:10:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:49,020 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-10-17 10:10:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:10:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-10-17 10:10:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:49,022 INFO L225 Difference]: With dead ends: 46 [2022-10-17 10:10:49,022 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 10:10:49,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:10:49,024 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:49,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 61 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:10:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 10:10:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-10-17 10:10:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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 10:10:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-10-17 10:10:49,031 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2022-10-17 10:10:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:49,031 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-10-17 10:10:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:10:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-10-17 10:10:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 10:10:49,033 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:49,033 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:49,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:10:49,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:49,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1517543941, now seen corresponding path program 1 times [2022-10-17 10:10:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:49,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124401736] [2022-10-17 10:10:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:49,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:49,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124401736] [2022-10-17 10:10:49,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124401736] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:49,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:49,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:10:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590230335] [2022-10-17 10:10:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:49,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:10:49,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:10:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:10:49,272 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:10:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:49,345 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-10-17 10:10:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:10:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-10-17 10:10:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:49,347 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:10:49,348 INFO L226 Difference]: Without dead ends: 40 [2022-10-17 10:10:49,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:10:49,350 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:49,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 56 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:10:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-17 10:10:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2022-10-17 10:10:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-10-17 10:10:49,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-10-17 10:10:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:49,357 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-10-17 10:10:49,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 10:10:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-10-17 10:10:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:10:49,358 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:49,359 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:49,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:10:49,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1906655974, now seen corresponding path program 1 times [2022-10-17 10:10:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829157818] [2022-10-17 10:10:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:49,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:49,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:49,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829157818] [2022-10-17 10:10:49,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829157818] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:49,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:49,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:10:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327603899] [2022-10-17 10:10:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:10:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:10:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:10:49,458 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:49,488 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-10-17 10:10:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:10:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-17 10:10:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:49,490 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:10:49,491 INFO L226 Difference]: Without dead ends: 34 [2022-10-17 10:10:49,492 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 10:10:49,498 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:49,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:10:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-10-17 10:10:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-10-17 10:10:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 10:10:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-10-17 10:10:49,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2022-10-17 10:10:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:49,515 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-10-17 10:10:49,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-10-17 10:10:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:10:49,522 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:49,523 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:49,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:10:49,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1462919029, now seen corresponding path program 1 times [2022-10-17 10:10:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:49,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077841269] [2022-10-17 10:10:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:49,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:49,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077841269] [2022-10-17 10:10:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077841269] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:10:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111687036] [2022-10-17 10:10:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:49,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:49,968 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:10:49,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:10:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:50,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-17 10:10:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:10:50,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:10:50,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:10:50,353 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:10:50,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:10:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:10:50,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 10:10:50,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:10:50,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:10:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:50,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:10:50,603 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_106 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_106) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-10-17 10:10:50,634 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_104 Int) (v_ArrVal_106 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_104)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_106) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)) is different from false [2022-10-17 10:10:50,737 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:50,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-10-17 10:10:50,756 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:50,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-10-17 10:10:50,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-10-17 10:10:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 10:10:50,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111687036] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:10:50,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:10:50,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-10-17 10:10:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300926760] [2022-10-17 10:10:50,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:10:50,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:10:50,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:50,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:10:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=240, Unknown=2, NotChecked=66, Total=380 [2022-10-17 10:10:50,952 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 10:10:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:51,196 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-10-17 10:10:51,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:10:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-17 10:10:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:51,198 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:10:51,198 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 10:10:51,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=329, Unknown=2, NotChecked=78, Total=506 [2022-10-17 10:10:51,200 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:51,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 133 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-10-17 10:10:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 10:10:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-10-17 10:10:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 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 10:10:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-10-17 10:10:51,207 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 19 [2022-10-17 10:10:51,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:51,208 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-10-17 10:10:51,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 10:10:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-10-17 10:10:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:10:51,209 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:51,209 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:51,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:10:51,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:10:51,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1319849960, now seen corresponding path program 1 times [2022-10-17 10:10:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:51,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209543661] [2022-10-17 10:10:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:51,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209543661] [2022-10-17 10:10:51,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209543661] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:10:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679691809] [2022-10-17 10:10:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:51,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:51,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:51,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:10:51,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:10:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-17 10:10:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:10:51,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:10:51,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:10:51,987 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:10:51,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:10:52,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:10:52,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 10:10:52,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:10:52,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:10:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:52,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:10:52,133 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_158 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_158) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2022-10-17 10:10:52,149 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_155 Int) (v_ArrVal_158 (Array Int Int))) (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_155)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_158) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2022-10-17 10:10:52,200 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:52,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-10-17 10:10:52,211 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:52,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-10-17 10:10:52,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-10-17 10:10:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 10:10:52,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679691809] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:10:52,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:10:52,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-10-17 10:10:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168703497] [2022-10-17 10:10:52,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:10:52,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:10:52,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:10:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=240, Unknown=3, NotChecked=66, Total=380 [2022-10-17 10:10:52,332 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 10:10:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:56,601 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-10-17 10:10:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:10:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-17 10:10:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:56,603 INFO L225 Difference]: With dead ends: 85 [2022-10-17 10:10:56,603 INFO L226 Difference]: Without dead ends: 81 [2022-10-17 10:10:56,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=108, Invalid=317, Unknown=3, NotChecked=78, Total=506 [2022-10-17 10:10:56,605 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:56,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 191 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-10-17 10:10:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-17 10:10:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 49. [2022-10-17 10:10:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 10:10:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-10-17 10:10:56,614 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 19 [2022-10-17 10:10:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:56,615 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-10-17 10:10:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 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 10:10:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-10-17 10:10:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:10:56,616 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:56,616 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:56,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:10:56,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:10:56,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:56,835 INFO L85 PathProgramCache]: Analyzing trace with hash 876113015, now seen corresponding path program 1 times [2022-10-17 10:10:56,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:56,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737021827] [2022-10-17 10:10:56,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:56,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:56,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:56,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737021827] [2022-10-17 10:10:56,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737021827] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:10:56,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:10:56,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:10:56,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909527451] [2022-10-17 10:10:56,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:10:56,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:10:56,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:56,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:10:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:10:56,875 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:56,891 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-10-17 10:10:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:10:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-17 10:10:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:56,895 INFO L225 Difference]: With dead ends: 67 [2022-10-17 10:10:56,895 INFO L226 Difference]: Without dead ends: 53 [2022-10-17 10:10:56,895 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 10:10:56,896 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:56,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:10:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-10-17 10:10:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-10-17 10:10:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 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 10:10:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-10-17 10:10:56,914 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 19 [2022-10-17 10:10:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:56,915 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-10-17 10:10:56,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:10:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-10-17 10:10:56,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:10:56,916 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:56,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:56,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:10:56,916 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:56,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1445257616, now seen corresponding path program 1 times [2022-10-17 10:10:56,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:56,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731931713] [2022-10-17 10:10:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:57,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:57,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731931713] [2022-10-17 10:10:57,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731931713] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:10:57,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973235041] [2022-10-17 10:10:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:57,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:57,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:57,467 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:10:57,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:10:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-17 10:10:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:10:57,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:10:57,622 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:10:57,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:10:57,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:10:57,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:10:57,735 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:10:57,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 61 [2022-10-17 10:10:57,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2022-10-17 10:10:57,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-10-17 10:10:57,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-10-17 10:10:57,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-10-17 10:10:57,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:10:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:57,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:10:57,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 57 [2022-10-17 10:10:57,857 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_231 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_231) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (forall ((v_ArrVal_233 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_233) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)))) is different from false [2022-10-17 10:10:57,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:57,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-10-17 10:10:57,908 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:57,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-10-17 10:10:57,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-10-17 10:10:57,940 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-10-17 10:10:57,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-10-17 10:10:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 10:10:58,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973235041] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:10:58,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:10:58,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-10-17 10:10:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933375112] [2022-10-17 10:10:58,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:10:58,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:10:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:10:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=226, Unknown=1, NotChecked=30, Total=306 [2022-10-17 10:10:58,073 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 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 10:10:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:10:58,349 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-10-17 10:10:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:10:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-10-17 10:10:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:10:58,351 INFO L225 Difference]: With dead ends: 65 [2022-10-17 10:10:58,351 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 10:10:58,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=381, Unknown=1, NotChecked=40, Total=506 [2022-10-17 10:10:58,352 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:10:58,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 135 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 204 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-10-17 10:10:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 10:10:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-10-17 10:10:58,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 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 10:10:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-10-17 10:10:58,367 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 21 [2022-10-17 10:10:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:10:58,369 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-10-17 10:10:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 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 10:10:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-10-17 10:10:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:10:58,371 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:10:58,371 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:10:58,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:10:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:58,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:10:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:10:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1652508907, now seen corresponding path program 2 times [2022-10-17 10:10:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:10:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902053254] [2022-10-17 10:10:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:10:58,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:10:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:10:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:10:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902053254] [2022-10-17 10:10:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902053254] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:10:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092031271] [2022-10-17 10:10:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:10:59,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:10:59,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:10:59,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:10:59,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:10:59,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:10:59,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:10:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-17 10:10:59,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:10:59,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:10:59,347 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:10:59,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:10:59,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:10:59,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:10:59,470 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:10:59,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 61 [2022-10-17 10:10:59,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2022-10-17 10:10:59,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-10-17 10:10:59,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-10-17 10:10:59,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-10-17 10:10:59,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:10:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:10:59,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:10:59,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 30 [2022-10-17 10:10:59,629 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_284 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_284) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)) (forall ((v_ArrVal_286 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)))) is different from false [2022-10-17 10:10:59,651 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:59,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-10-17 10:10:59,659 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:10:59,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-10-17 10:10:59,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:10:59,681 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-10-17 10:10:59,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-10-17 10:10:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 10:10:59,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092031271] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:10:59,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:10:59,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-10-17 10:10:59,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017613610] [2022-10-17 10:10:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:10:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 10:10:59,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:10:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 10:10:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=362, Unknown=1, NotChecked=38, Total=462 [2022-10-17 10:10:59,799 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 10:11:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:11:00,281 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-10-17 10:11:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:11:00,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 10:11:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:11:00,282 INFO L225 Difference]: With dead ends: 67 [2022-10-17 10:11:00,282 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:11:00,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=783, Unknown=1, NotChecked=58, Total=992 [2022-10-17 10:11:00,284 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:11:00,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 191 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 317 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-10-17 10:11:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:11:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2022-10-17 10:11:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:11:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-10-17 10:11:00,291 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 23 [2022-10-17 10:11:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:11:00,291 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-10-17 10:11:00,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 10:11:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-10-17 10:11:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 10:11:00,292 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:11:00,292 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:11:00,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:11:00,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:11:00,514 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:11:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:11:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1313154078, now seen corresponding path program 1 times [2022-10-17 10:11:00,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:11:00,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016588887] [2022-10-17 10:11:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:11:00,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:11:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:11:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:00,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:11:00,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016588887] [2022-10-17 10:11:00,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016588887] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:11:00,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287383489] [2022-10-17 10:11:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:11:00,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:11:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:11:00,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:11:00,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:11:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:11:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 37 conjunts are in the unsatisfiable core [2022-10-17 10:11:01,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:11:01,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:11:01,095 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:11:01,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:11:01,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:11:01,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 10:11:01,189 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:11:01,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 61 [2022-10-17 10:11:01,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-10-17 10:11:01,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-10-17 10:11:01,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-10-17 10:11:01,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-10-17 10:11:01,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:11:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:01,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:11:01,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 30 [2022-10-17 10:11:01,364 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_336 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_336) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)) (forall ((v_ArrVal_338 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_338) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))))) is different from false [2022-10-17 10:11:01,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:01,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-10-17 10:11:01,399 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:01,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-10-17 10:11:01,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:11:01,424 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-10-17 10:11:01,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-10-17 10:11:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 10:11:01,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287383489] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:11:01,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:11:01,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-10-17 10:11:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051168377] [2022-10-17 10:11:01,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:11:01,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 10:11:01,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:11:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 10:11:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=362, Unknown=1, NotChecked=38, Total=462 [2022-10-17 10:11:01,562 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 10:11:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:11:01,955 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-10-17 10:11:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:11:01,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 10:11:01,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:11:01,957 INFO L225 Difference]: With dead ends: 61 [2022-10-17 10:11:01,957 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 10:11:01,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=783, Unknown=1, NotChecked=58, Total=992 [2022-10-17 10:11:01,958 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:11:01,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 191 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 206 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-10-17 10:11:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 10:11:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-10-17 10:11:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 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 10:11:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-10-17 10:11:01,964 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-10-17 10:11:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:11:01,965 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-10-17 10:11:01,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 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 10:11:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-10-17 10:11:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:11:01,966 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:11:01,966 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:11:02,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:11:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:11:02,190 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:11:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:11:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1075490678, now seen corresponding path program 2 times [2022-10-17 10:11:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:11:02,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886942619] [2022-10-17 10:11:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:11:02,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:11:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:11:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:02,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:11:02,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886942619] [2022-10-17 10:11:02,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886942619] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:11:02,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875506757] [2022-10-17 10:11:02,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:11:02,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:11:02,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:11:02,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:11:02,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:11:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:11:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:11:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 47 conjunts are in the unsatisfiable core [2022-10-17 10:11:02,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:11:02,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:11:02,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:11:02,794 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:11:02,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:11:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:11:02,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 10:11:02,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:11:02,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:11:02,972 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 10:11:02,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-10-17 10:11:03,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:11:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:03,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:11:04,312 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 1) (= 3 .cse0)))) is different from false [2022-10-17 10:11:04,340 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_420))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 1)))) is different from false [2022-10-17 10:11:04,359 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_420))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 1)))) is different from false [2022-10-17 10:11:04,405 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (v_ArrVal_415 Int) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_415)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_420))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 1) (= .cse0 3)))) is different from false [2022-10-17 10:11:04,500 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:04,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 61 [2022-10-17 10:11:04,521 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:04,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 273 [2022-10-17 10:11:04,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 241 [2022-10-17 10:11:04,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-10-17 10:11:04,628 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:04,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 141 [2022-10-17 10:11:05,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 125 [2022-10-17 10:11:05,888 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:05,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 294 [2022-10-17 10:11:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-10-17 10:11:06,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875506757] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:11:06,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:11:06,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-10-17 10:11:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316541393] [2022-10-17 10:11:06,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:11:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-17 10:11:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:11:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-17 10:11:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=645, Unknown=5, NotChecked=220, Total=992 [2022-10-17 10:11:06,294 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 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 10:11:06,410 WARN L833 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|) 1) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_420))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 1)))) (not (= |c_ULTIMATE.start_main_~t~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from false [2022-10-17 10:11:06,419 WARN L833 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|) 1) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_420))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 1)))) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from false [2022-10-17 10:11:06,426 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~t~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~p~0#1.base_59| Int) (v_ArrVal_420 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_420))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_59|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 1)))) (= |c_ULTIMATE.start_main_~t~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from false [2022-10-17 10:11:07,637 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~p~0#1.base| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 1) (= 3 .cse0)))) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~p~0#1.offset| 0)) is different from false [2022-10-17 10:11:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:11:07,731 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-10-17 10:11:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:11:07,732 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:11:07,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:11:07,733 INFO L225 Difference]: With dead ends: 55 [2022-10-17 10:11:07,733 INFO L226 Difference]: Without dead ends: 51 [2022-10-17 10:11:07,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=160, Invalid=793, Unknown=9, NotChecked=520, Total=1482 [2022-10-17 10:11:07,734 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:11:07,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 201 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-10-17 10:11:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-10-17 10:11:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-10-17 10:11:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 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 10:11:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-10-17 10:11:07,741 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 25 [2022-10-17 10:11:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:11:07,742 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-10-17 10:11:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 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 10:11:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-10-17 10:11:07,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:11:07,743 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:11:07,743 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:11:07,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:11:07,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:11:07,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:11:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:11:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1387463807, now seen corresponding path program 2 times [2022-10-17 10:11:07,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:11:07,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661621276] [2022-10-17 10:11:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:11:07,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:11:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:11:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:08,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:11:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661621276] [2022-10-17 10:11:08,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661621276] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:11:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509676210] [2022-10-17 10:11:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:11:08,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:11:08,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:11:08,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:11:08,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:11:08,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:11:08,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:11:08,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 47 conjunts are in the unsatisfiable core [2022-10-17 10:11:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:11:08,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:11:08,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:11:08,603 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:11:08,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:11:08,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:11:08,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 10:11:08,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:11:08,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:11:08,800 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 10:11:08,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-10-17 10:11:08,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:11:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:08,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:11:11,029 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~p~0#1.base| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= 2 .cse0) (= 3 .cse0)))) is different from false [2022-10-17 10:11:11,054 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_507 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_507))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 2)))) is different from false [2022-10-17 10:11:11,074 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_507 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_507))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) is different from false [2022-10-17 10:11:11,116 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 Int) (v_ArrVal_507 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int)) (let ((.cse0 (select (select (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_500)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_507))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) is different from false [2022-10-17 10:11:11,214 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:11,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 61 [2022-10-17 10:11:11,243 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:11,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 273 [2022-10-17 10:11:11,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 241 [2022-10-17 10:11:11,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-10-17 10:11:11,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 125 [2022-10-17 10:11:11,496 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:11,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 137 [2022-10-17 10:11:12,037 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:11:12,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 349 treesize of output 329 [2022-10-17 10:11:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-10-17 10:11:12,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509676210] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:11:12,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:11:12,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-10-17 10:11:12,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974759133] [2022-10-17 10:11:12,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:11:12,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-10-17 10:11:12,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:11:12,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-10-17 10:11:12,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=645, Unknown=5, NotChecked=220, Total=992 [2022-10-17 10:11:12,896 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 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 10:11:13,023 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_507 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_507))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) (= (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~t~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2022-10-17 10:11:13,026 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_507 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_507))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67|) 0 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 2) (= .cse0 3)))) (= (select |c_#valid| |c_ULTIMATE.start_main_~a~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2022-10-17 10:11:13,035 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~t~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~t~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((v_ArrVal_507 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.base_67| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_507))) (store .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67| (store (select .cse1 |v_ULTIMATE.start_main_~p~0#1.base_67|) |c_ULTIMATE.start_main_~t~0#1.offset| 3))) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= .cse0 3) (= .cse0 2)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2022-10-17 10:11:14,184 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~p~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~p~0#1.base| Int)) (let ((.cse0 (select (select (store |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset| 3)) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= 2 .cse0) (= 3 .cse0)))) (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2022-10-17 10:11:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:11:14,298 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-10-17 10:11:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:11:14,299 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:11:14,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:11:14,300 INFO L225 Difference]: With dead ends: 75 [2022-10-17 10:11:14,300 INFO L226 Difference]: Without dead ends: 71 [2022-10-17 10:11:14,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=160, Invalid=793, Unknown=9, NotChecked=520, Total=1482 [2022-10-17 10:11:14,302 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:11:14,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 211 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 195 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-10-17 10:11:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-17 10:11:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-10-17 10:11:14,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 states have internal predecessors, (67), 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 10:11:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-10-17 10:11:14,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 25 [2022-10-17 10:11:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:11:14,308 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-10-17 10:11:14,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 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 10:11:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-10-17 10:11:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:11:14,310 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:11:14,310 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:11:14,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:11:14,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:11:14,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:11:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:11:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1574953317, now seen corresponding path program 3 times [2022-10-17 10:11:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:11:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332693347] [2022-10-17 10:11:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:11:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:11:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:11:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:15,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:11:15,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332693347] [2022-10-17 10:11:15,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332693347] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:11:15,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770653177] [2022-10-17 10:11:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:11:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:11:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:11:15,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:11:15,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_625d5e0d-8ccb-4cd0-8f74-8c0a0743fb86/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:11:15,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 10:11:15,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:11:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 66 conjunts are in the unsatisfiable core [2022-10-17 10:11:15,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:11:15,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:11:15,424 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:11:15,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:11:15,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:11:15,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:11:15,562 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:11:15,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-10-17 10:11:15,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:11:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:11:15,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-10-17 10:11:15,704 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:11:15,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 92 [2022-10-17 10:11:15,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:11:15,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2022-10-17 10:11:15,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-10-17 10:11:15,817 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 10:11:15,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-10-17 10:11:15,843 INFO L356 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-10-17 10:11:15,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 70 [2022-10-17 10:11:15,861 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-10-17 10:11:15,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2022-10-17 10:11:15,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-10-17 10:11:15,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 57 [2022-10-17 10:11:15,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-10-17 10:11:16,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-10-17 10:11:16,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 93 [2022-10-17 10:11:16,385 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-10-17 10:11:16,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 78 [2022-10-17 10:11:16,667 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:11:16,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-10-17 10:11:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:11:16,695 INFO L328 TraceCheckSpWp]: Computing backward predicates...