./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:56:14,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:56:14,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:56:14,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:56:14,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:56:14,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:56:14,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:56:14,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:56:14,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:56:14,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:56:14,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:56:14,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:56:14,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:56:14,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:56:14,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:56:14,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:56:14,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:56:14,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:56:14,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:56:14,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:56:14,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:56:14,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:56:14,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:56:14,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:56:14,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:56:14,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:56:14,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:56:14,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:56:14,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:56:14,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:56:14,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:56:14,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:56:14,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:56:14,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:56:14,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:56:14,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:56:14,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:56:14,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:56:14,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:56:14,270 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:56:14,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:56:14,275 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 05:56:14,313 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:56:14,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:56:14,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:56:14,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:56:14,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:56:14,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:56:14,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:56:14,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:56:14,317 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:56:14,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:56:14,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:56:14,318 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:56:14,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:56:14,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:56:14,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:56:14,319 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:56:14,319 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:56:14,320 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:56:14,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:56:14,320 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:56:14,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:56:14,320 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:56:14,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:56:14,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:56:14,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:56:14,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:56:14,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:56:14,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:56:14,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:56:14,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:56:14,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:56:14,323 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_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 [2021-11-20 05:56:14,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:56:14,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:56:14,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:56:14,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:56:14,632 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:56:14,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-11-20 05:56:14,709 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/data/98a033e6f/179eeea8a9564773ab08192ae7aa2a90/FLAGf8affdc94 [2021-11-20 05:56:15,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:56:15,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-11-20 05:56:15,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/data/98a033e6f/179eeea8a9564773ab08192ae7aa2a90/FLAGf8affdc94 [2021-11-20 05:56:15,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/data/98a033e6f/179eeea8a9564773ab08192ae7aa2a90 [2021-11-20 05:56:15,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:56:15,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:56:15,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:56:15,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:56:15,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:56:15,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:56:15" (1/1) ... [2021-11-20 05:56:15,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369a310b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:15, skipping insertion in model container [2021-11-20 05:56:15,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:56:15" (1/1) ... [2021-11-20 05:56:15,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:56:15,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:56:16,040 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_6780c61c-74f8-4f70-91fc-1baa96261e69/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-11-20 05:56:16,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:56:16,062 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:56:16,138 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_6780c61c-74f8-4f70-91fc-1baa96261e69/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-11-20 05:56:16,139 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:56:16,174 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:56:16,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16 WrapperNode [2021-11-20 05:56:16,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:56:16,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:56:16,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:56:16,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:56:16,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,255 INFO L137 Inliner]: procedures = 127, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2021-11-20 05:56:16,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:56:16,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:56:16,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:56:16,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:56:16,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:56:16,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:56:16,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:56:16,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:56:16,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (1/1) ... [2021-11-20 05:56:16,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:56:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:16,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:56:16,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:56:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-20 05:56:16,393 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-20 05:56:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:56:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:56:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:56:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:56:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:56:16,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:56:16,563 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:56:16,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:56:16,619 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-20 05:56:16,927 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:56:16,933 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:56:16,933 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:56:16,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:56:16 BoogieIcfgContainer [2021-11-20 05:56:16,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:56:16,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:56:16,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:56:16,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:56:16,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:56:15" (1/3) ... [2021-11-20 05:56:16,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3053cb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:56:16, skipping insertion in model container [2021-11-20 05:56:16,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:56:16" (2/3) ... [2021-11-20 05:56:16,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3053cb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:56:16, skipping insertion in model container [2021-11-20 05:56:16,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:56:16" (3/3) ... [2021-11-20 05:56:16,943 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-11-20 05:56:16,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:56:16,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-20 05:56:17,015 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:56:17,023 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:56:17,024 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-20 05:56:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 50 states have (on average 2.06) internal successors, (103), 92 states have internal predecessors, (103), 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) [2021-11-20 05:56:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 05:56:17,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:17,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 05:56:17,053 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:17,058 INFO L85 PathProgramCache]: Analyzing trace with hash 33471376, now seen corresponding path program 1 times [2021-11-20 05:56:17,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:17,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578952047] [2021-11-20 05:56:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:17,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:17,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578952047] [2021-11-20 05:56:17,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578952047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:17,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:17,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:56:17,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752414375] [2021-11-20 05:56:17,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:17,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:56:17,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:56:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:56:17,306 INFO L87 Difference]: Start difference. First operand has 94 states, 50 states have (on average 2.06) internal successors, (103), 92 states have internal predecessors, (103), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:17,473 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2021-11-20 05:56:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:56:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-20 05:56:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:17,483 INFO L225 Difference]: With dead ends: 161 [2021-11-20 05:56:17,483 INFO L226 Difference]: Without dead ends: 154 [2021-11-20 05:56:17,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:56:17,501 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 84 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:17,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 176 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-20 05:56:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 85. [2021-11-20 05:56:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-11-20 05:56:17,539 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 5 [2021-11-20 05:56:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:17,540 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-11-20 05:56:17,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-11-20 05:56:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 05:56:17,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:17,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 05:56:17,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:56:17,541 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash 33471377, now seen corresponding path program 1 times [2021-11-20 05:56:17,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:17,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904660524] [2021-11-20 05:56:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:17,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904660524] [2021-11-20 05:56:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904660524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:17,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:17,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:56:17,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456875234] [2021-11-20 05:56:17,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:17,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:56:17,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:56:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:56:17,593 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:17,697 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2021-11-20 05:56:17,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:56:17,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-20 05:56:17,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:17,699 INFO L225 Difference]: With dead ends: 153 [2021-11-20 05:56:17,699 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 05:56:17,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:56:17,701 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 82 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:17,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 170 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 05:56:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2021-11-20 05:56:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.851063829787234) internal successors, (87), 81 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-11-20 05:56:17,712 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 5 [2021-11-20 05:56:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-11-20 05:56:17,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-11-20 05:56:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 05:56:17,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:17,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:17,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:56:17,714 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2100113040, now seen corresponding path program 1 times [2021-11-20 05:56:17,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:17,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44929254] [2021-11-20 05:56:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:17,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44929254] [2021-11-20 05:56:17,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44929254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:17,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:17,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:56:17,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496215736] [2021-11-20 05:56:17,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:17,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:56:17,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:56:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:56:17,750 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:17,759 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-11-20 05:56:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:56:17,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-20 05:56:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:17,761 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:56:17,761 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 05:56:17,762 INFO L932 BasicCegarLoop]: 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 [2021-11-20 05:56:17,763 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:17,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 168 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 05:56:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-11-20 05:56:17,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-20 05:56:17,771 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 7 [2021-11-20 05:56:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:17,772 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-20 05:56:17,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-20 05:56:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:56:17,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:17,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:17,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:56:17,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:17,774 INFO L85 PathProgramCache]: Analyzing trace with hash 638916372, now seen corresponding path program 1 times [2021-11-20 05:56:17,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:17,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816749549] [2021-11-20 05:56:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:17,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816749549] [2021-11-20 05:56:17,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816749549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:17,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:17,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:56:17,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736911108] [2021-11-20 05:56:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:17,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:56:17,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:17,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:56:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:56:17,849 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:17,873 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-20 05:56:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:56:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 05:56:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:17,874 INFO L225 Difference]: With dead ends: 89 [2021-11-20 05:56:17,875 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 05:56:17,875 INFO L932 BasicCegarLoop]: 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 [2021-11-20 05:56:17,885 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:17,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 163 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 05:56:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-11-20 05:56:17,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.7547169811320755) internal successors, (93), 87 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-11-20 05:56:17,901 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 9 [2021-11-20 05:56:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:17,902 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-11-20 05:56:17,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-11-20 05:56:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:56:17,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:17,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:17,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:56:17,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -763066913, now seen corresponding path program 1 times [2021-11-20 05:56:17,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:17,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471400636] [2021-11-20 05:56:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:17,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:18,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:18,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471400636] [2021-11-20 05:56:18,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471400636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85204081] [2021-11-20 05:56:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:18,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:18,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:18,078 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:18,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:56:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:18,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 05:56:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:18,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:18,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:18,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85204081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:18,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:18,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-20 05:56:18,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127189094] [2021-11-20 05:56:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:18,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:56:18,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:56:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:18,287 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:18,382 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-11-20 05:56:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:56:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 05:56:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:18,383 INFO L225 Difference]: With dead ends: 97 [2021-11-20 05:56:18,384 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 05:56:18,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:18,385 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 64 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 66 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 [2021-11-20 05:56:18,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 66 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 05:56:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-11-20 05:56:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 84 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-11-20 05:56:18,391 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 14 [2021-11-20 05:56:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:18,391 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-11-20 05:56:18,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-11-20 05:56:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:56:18,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:18,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:18,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:18,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:18,621 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:18,622 INFO L85 PathProgramCache]: Analyzing trace with hash -763066912, now seen corresponding path program 1 times [2021-11-20 05:56:18,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:18,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918865671] [2021-11-20 05:56:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:18,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:18,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918865671] [2021-11-20 05:56:18,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918865671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686109028] [2021-11-20 05:56:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:18,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:18,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:18,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:56:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:56:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:18,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:18,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686109028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:18,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:18,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-20 05:56:18,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145393271] [2021-11-20 05:56:18,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:18,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:18,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:18,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:18,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:18,921 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:18,935 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-11-20 05:56:18,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:18,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 05:56:18,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:18,936 INFO L225 Difference]: With dead ends: 87 [2021-11-20 05:56:18,936 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 05:56:18,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:18,937 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 16 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:18,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 162 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 05:56:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 05:56:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 86 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-11-20 05:56:18,943 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 14 [2021-11-20 05:56:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:18,944 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-11-20 05:56:18,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-11-20 05:56:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:56:18,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:18,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:18,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:19,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:19,171 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:19,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949021, now seen corresponding path program 1 times [2021-11-20 05:56:19,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181213409] [2021-11-20 05:56:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:19,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:19,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181213409] [2021-11-20 05:56:19,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181213409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923295498] [2021-11-20 05:56:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:19,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:19,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:19,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:56:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:19,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:56:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:19,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:19,425 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 05:56:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 05:56:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:19,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:19,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923295498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:19,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:19,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 05:56:19,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425045225] [2021-11-20 05:56:19,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:56:19,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:56:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:56:19,758 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:19,916 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2021-11-20 05:56:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:56:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 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 16 [2021-11-20 05:56:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:19,918 INFO L225 Difference]: With dead ends: 173 [2021-11-20 05:56:19,919 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 05:56:19,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:56:19,920 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 347 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:19,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 214 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2021-11-20 05:56:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 05:56:19,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 95. [2021-11-20 05:56:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 94 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-11-20 05:56:19,927 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 16 [2021-11-20 05:56:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:19,927 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-11-20 05:56:19,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-11-20 05:56:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 05:56:19,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:19,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:19,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:20,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:56:20,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:20,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2097949020, now seen corresponding path program 1 times [2021-11-20 05:56:20,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:20,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886796925] [2021-11-20 05:56:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:20,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:20,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886796925] [2021-11-20 05:56:20,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886796925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:20,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567140048] [2021-11-20 05:56:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:20,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:20,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:20,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:20,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:56:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:56:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:20,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:20,424 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:56:20,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 [2021-11-20 05:56:20,433 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:56:20,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 05:56:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:20,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:20,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-20 05:56:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:20,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567140048] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:20,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:20,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2021-11-20 05:56:20,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677661034] [2021-11-20 05:56:20,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:20,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:56:20,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:56:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:56:20,987 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:21,276 INFO L93 Difference]: Finished difference Result 174 states and 185 transitions. [2021-11-20 05:56:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:56:21,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 14 states have internal predecessors, (44), 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 16 [2021-11-20 05:56:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:21,277 INFO L225 Difference]: With dead ends: 174 [2021-11-20 05:56:21,277 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 05:56:21,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:56:21,278 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:21,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 218 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 199 Invalid, 0 Unknown, 149 Unchecked, 0.2s Time] [2021-11-20 05:56:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 05:56:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 95. [2021-11-20 05:56:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 63 states have (on average 1.619047619047619) internal successors, (102), 94 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-11-20 05:56:21,284 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 16 [2021-11-20 05:56:21,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:21,284 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-11-20 05:56:21,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-11-20 05:56:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:56:21,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:21,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:21,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:21,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:21,509 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1307957327, now seen corresponding path program 2 times [2021-11-20 05:56:21,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:21,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302412964] [2021-11-20 05:56:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:21,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:21,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302412964] [2021-11-20 05:56:21,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302412964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398258367] [2021-11-20 05:56:21,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:56:21,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:21,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:21,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:56:21,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 05:56:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:56:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:56:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:21,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:21,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:21,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398258367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:21,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:21,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-20 05:56:21,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954451748] [2021-11-20 05:56:21,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:56:21,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:21,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:56:21,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:21,700 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:21,752 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-20 05:56:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:56:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-20 05:56:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:21,754 INFO L225 Difference]: With dead ends: 92 [2021-11-20 05:56:21,754 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 05:56:21,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:21,757 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:21,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 61 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 05:56:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 05:56:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-11-20 05:56:21,769 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 21 [2021-11-20 05:56:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:21,770 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-11-20 05:56:21,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-11-20 05:56:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 05:56:21,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:21,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 05:56:21,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:21,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:21,995 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1749725711, now seen corresponding path program 1 times [2021-11-20 05:56:21,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:21,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787666405] [2021-11-20 05:56:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:21,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:22,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787666405] [2021-11-20 05:56:22,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787666405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:22,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038609707] [2021-11-20 05:56:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:22,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:22,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:22,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:22,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:56:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:56:22,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:22,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:22,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038609707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:22,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:22,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-20 05:56:22,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876104127] [2021-11-20 05:56:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:22,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:22,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:22,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:22,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:56:22,217 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:22,227 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-11-20 05:56:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 05:56:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:22,228 INFO L225 Difference]: With dead ends: 84 [2021-11-20 05:56:22,228 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 05:56:22,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:56:22,230 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 139 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:22,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 95 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 05:56:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-11-20 05:56:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-20 05:56:22,235 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 24 [2021-11-20 05:56:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:22,235 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-20 05:56:22,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-20 05:56:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:56:22,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:22,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:22,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:22,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:56:22,455 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:22,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:22,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1087183919, now seen corresponding path program 1 times [2021-11-20 05:56:22,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7627815] [2021-11-20 05:56:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:22,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:22,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7627815] [2021-11-20 05:56:22,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7627815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:22,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212006480] [2021-11-20 05:56:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:22,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:22,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:22,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:22,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:56:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:22,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:56:22,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:22,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:22,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212006480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:56:22,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:56:22,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-20 05:56:22,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906882155] [2021-11-20 05:56:22,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:56:22,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:56:22,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:56:22,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:56:22,689 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:22,715 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-11-20 05:56:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:22,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 05:56:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:22,719 INFO L225 Difference]: With dead ends: 82 [2021-11-20 05:56:22,719 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 05:56:22,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:22,720 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 141 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:22,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 75 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 05:56:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-20 05:56:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 81 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2021-11-20 05:56:22,724 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 26 [2021-11-20 05:56:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:22,725 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2021-11-20 05:56:22,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2021-11-20 05:56:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:56:22,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:22,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:22,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:22,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 05:56:22,943 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 157247510, now seen corresponding path program 1 times [2021-11-20 05:56:22,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:22,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127615039] [2021-11-20 05:56:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:22,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:23,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127615039] [2021-11-20 05:56:23,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127615039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:23,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376121802] [2021-11-20 05:56:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:23,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:23,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:23,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:23,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:56:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:56:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:23,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:23,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:56:23,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 17 [2021-11-20 05:56:23,410 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 05:56:23,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 05:56:23,610 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 05:56:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-20 05:56:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:56:23,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:43,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376121802] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:43,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:56:43,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 11 [2021-11-20 05:56:43,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852854306] [2021-11-20 05:56:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:43,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:43,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:43,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:43,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=90, Unknown=3, NotChecked=0, Total=132 [2021-11-20 05:56:43,360 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:43,438 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-11-20 05:56:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 05:56:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:43,440 INFO L225 Difference]: With dead ends: 88 [2021-11-20 05:56:43,440 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 05:56:43,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=45, Invalid=108, Unknown=3, NotChecked=0, Total=156 [2021-11-20 05:56:43,441 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 111 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:43,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 67 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-20 05:56:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 05:56:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2021-11-20 05:56:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 75 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2021-11-20 05:56:43,443 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 27 [2021-11-20 05:56:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:43,444 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2021-11-20 05:56:43,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2021-11-20 05:56:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 05:56:43,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:43,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:43,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:43,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:43,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:43,655 INFO L85 PathProgramCache]: Analyzing trace with hash 157247511, now seen corresponding path program 1 times [2021-11-20 05:56:43,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:43,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467063144] [2021-11-20 05:56:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:43,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:56:43,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:43,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467063144] [2021-11-20 05:56:43,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467063144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655876263] [2021-11-20 05:56:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:43,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:43,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:43,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:56:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:56:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:43,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:43,942 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:56:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 17 [2021-11-20 05:56:44,141 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 05:56:44,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-20 05:56:44,380 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 05:56:44,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 05:56:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 05:56:44,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:56:44,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655876263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:44,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:56:44,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-20 05:56:44,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782777371] [2021-11-20 05:56:44,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:44,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:44,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:44,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:44,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:56:44,521 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:44,557 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2021-11-20 05:56:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:44,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 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 27 [2021-11-20 05:56:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:44,558 INFO L225 Difference]: With dead ends: 75 [2021-11-20 05:56:44,558 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 05:56:44,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:56:44,560 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2021-11-20 05:56:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 05:56:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-20 05:56:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-11-20 05:56:44,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 27 [2021-11-20 05:56:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:44,563 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-11-20 05:56:44,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-11-20 05:56:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:56:44,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:44,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:44,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:56:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 05:56:44,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 579705555, now seen corresponding path program 1 times [2021-11-20 05:56:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732576556] [2021-11-20 05:56:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:44,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:44,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:44,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732576556] [2021-11-20 05:56:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732576556] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:44,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:44,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038274139] [2021-11-20 05:56:44,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:44,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:44,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:44,826 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:44,911 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-11-20 05:56:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:44,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 05:56:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:44,913 INFO L225 Difference]: With dead ends: 86 [2021-11-20 05:56:44,913 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 05:56:44,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:56:44,914 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:44,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 88 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 05:56:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2021-11-20 05:56:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.4) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-20 05:56:44,917 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 28 [2021-11-20 05:56:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:44,917 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-20 05:56:44,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-20 05:56:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:56:44,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:44,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:44,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 05:56:44,918 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:44,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash 579705556, now seen corresponding path program 1 times [2021-11-20 05:56:44,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929946144] [2021-11-20 05:56:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:44,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:45,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:45,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929946144] [2021-11-20 05:56:45,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929946144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:45,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:45,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:45,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492736949] [2021-11-20 05:56:45,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:45,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:45,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:45,023 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:45,110 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-11-20 05:56:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:56:45,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 05:56:45,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:45,111 INFO L225 Difference]: With dead ends: 73 [2021-11-20 05:56:45,112 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 05:56:45,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:56:45,112 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 152 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:45,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 62 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:45,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 05:56:45,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-20 05:56:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-20 05:56:45,117 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 28 [2021-11-20 05:56:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:45,118 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-20 05:56:45,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-20 05:56:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:56:45,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:45,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:45,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 05:56:45,120 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1248708715, now seen corresponding path program 1 times [2021-11-20 05:56:45,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:45,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547999043] [2021-11-20 05:56:45,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:45,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:45,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547999043] [2021-11-20 05:56:45,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547999043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:45,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:45,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:56:45,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174714673] [2021-11-20 05:56:45,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:45,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:56:45,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:56:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:56:45,202 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:45,249 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-11-20 05:56:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:56:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-20 05:56:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:45,251 INFO L225 Difference]: With dead ends: 70 [2021-11-20 05:56:45,251 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 05:56:45,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:56:45,252 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 143 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:45,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 67 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:56:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 05:56:45,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-20 05:56:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-11-20 05:56:45,255 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 30 [2021-11-20 05:56:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:45,255 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-11-20 05:56:45,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-11-20 05:56:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:56:45,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:45,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:45,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 05:56:45,257 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:45,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1569558015, now seen corresponding path program 1 times [2021-11-20 05:56:45,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:45,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108135205] [2021-11-20 05:56:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:45,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:56:45,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108135205] [2021-11-20 05:56:45,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108135205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:45,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:45,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 05:56:45,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067243183] [2021-11-20 05:56:45,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:45,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:56:45,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:45,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:56:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:56:45,509 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 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) [2021-11-20 05:56:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:45,906 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2021-11-20 05:56:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:56:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 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) Word has length 33 [2021-11-20 05:56:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:45,907 INFO L225 Difference]: With dead ends: 82 [2021-11-20 05:56:45,907 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 05:56:45,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-11-20 05:56:45,908 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 183 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:45,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 139 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 05:56:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2021-11-20 05:56:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.309090909090909) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-20 05:56:45,911 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 33 [2021-11-20 05:56:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:45,912 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-20 05:56:45,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 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) [2021-11-20 05:56:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-20 05:56:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:56:45,913 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:45,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:45,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 05:56:45,913 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1569558014, now seen corresponding path program 1 times [2021-11-20 05:56:45,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:45,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273537752] [2021-11-20 05:56:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:45,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:46,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273537752] [2021-11-20 05:56:46,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273537752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:46,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:46,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 05:56:46,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708253665] [2021-11-20 05:56:46,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:46,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:56:46,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:56:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:56:46,248 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:46,711 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-20 05:56:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:56:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-20 05:56:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:46,712 INFO L225 Difference]: With dead ends: 69 [2021-11-20 05:56:46,712 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 05:56:46,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-20 05:56:46,713 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 165 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:46,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 137 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 05:56:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-11-20 05:56:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.290909090909091) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-11-20 05:56:46,715 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 33 [2021-11-20 05:56:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:46,715 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-11-20 05:56:46,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-11-20 05:56:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:56:46,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:46,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:46,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 05:56:46,717 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1411380072, now seen corresponding path program 1 times [2021-11-20 05:56:46,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:46,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376326657] [2021-11-20 05:56:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:46,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:46,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:46,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376326657] [2021-11-20 05:56:46,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376326657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:46,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:46,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:56:46,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887167697] [2021-11-20 05:56:46,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:46,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:56:46,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:56:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:56:46,842 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:46,902 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-11-20 05:56:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:56:46,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 05:56:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:46,903 INFO L225 Difference]: With dead ends: 66 [2021-11-20 05:56:46,903 INFO L226 Difference]: Without dead ends: 66 [2021-11-20 05:56:46,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:56:46,904 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:46,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 56 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-20 05:56:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-20 05:56:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-11-20 05:56:46,908 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2021-11-20 05:56:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:46,908 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-11-20 05:56:46,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-11-20 05:56:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:56:46,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:46,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:46,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 05:56:46,909 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1306141903, now seen corresponding path program 1 times [2021-11-20 05:56:46,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:46,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058318827] [2021-11-20 05:56:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:46,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:47,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:47,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058318827] [2021-11-20 05:56:47,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058318827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:47,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:47,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:56:47,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57457883] [2021-11-20 05:56:47,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:47,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:56:47,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:47,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:56:47,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:56:47,022 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 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) [2021-11-20 05:56:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:47,225 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-11-20 05:56:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:56:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 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) Word has length 37 [2021-11-20 05:56:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:47,227 INFO L225 Difference]: With dead ends: 97 [2021-11-20 05:56:47,227 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 05:56:47,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:56:47,228 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 259 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:47,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 145 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 05:56:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-11-20 05:56:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.263157894736842) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-11-20 05:56:47,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 37 [2021-11-20 05:56:47,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:47,231 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-11-20 05:56:47,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 9 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) [2021-11-20 05:56:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-11-20 05:56:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:56:47,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:47,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:47,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 05:56:47,232 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:47,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1306141904, now seen corresponding path program 1 times [2021-11-20 05:56:47,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:47,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395387817] [2021-11-20 05:56:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:47,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:47,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:47,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395387817] [2021-11-20 05:56:47,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395387817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:47,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:47,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 05:56:47,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049663555] [2021-11-20 05:56:47,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:56:47,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:56:47,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:56:47,376 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 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) [2021-11-20 05:56:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:47,619 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-20 05:56:47,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:56:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 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) Word has length 37 [2021-11-20 05:56:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:47,621 INFO L225 Difference]: With dead ends: 89 [2021-11-20 05:56:47,621 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 05:56:47,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:56:47,622 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 262 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:47,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 128 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:47,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 05:56:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2021-11-20 05:56:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-11-20 05:56:47,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 37 [2021-11-20 05:56:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:47,625 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-11-20 05:56:47,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 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) [2021-11-20 05:56:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-11-20 05:56:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:56:47,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:47,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:47,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 05:56:47,627 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:47,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1835692060, now seen corresponding path program 1 times [2021-11-20 05:56:47,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:47,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087945067] [2021-11-20 05:56:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:47,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 05:56:47,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:47,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087945067] [2021-11-20 05:56:47,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087945067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:47,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:47,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 05:56:47,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134985254] [2021-11-20 05:56:47,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:47,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:56:47,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:56:47,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:56:47,744 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:47,893 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-11-20 05:56:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:56:47,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 05:56:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:47,896 INFO L225 Difference]: With dead ends: 72 [2021-11-20 05:56:47,896 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 05:56:47,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:56:47,897 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 177 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:47,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 171 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:56:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 05:56:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-11-20 05:56:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-11-20 05:56:47,898 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 38 [2021-11-20 05:56:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:47,899 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-11-20 05:56:47,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-11-20 05:56:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:56:47,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:47,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:47,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 05:56:47,899 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:47,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash -676090250, now seen corresponding path program 1 times [2021-11-20 05:56:47,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:47,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075800274] [2021-11-20 05:56:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:47,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:48,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075800274] [2021-11-20 05:56:48,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075800274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:48,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:48,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 05:56:48,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924854424] [2021-11-20 05:56:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:48,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:56:48,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:56:48,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:56:48,127 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:48,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:48,468 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-11-20 05:56:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:56:48,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 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 41 [2021-11-20 05:56:48,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:48,469 INFO L225 Difference]: With dead ends: 69 [2021-11-20 05:56:48,469 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 05:56:48,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:56:48,470 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 146 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:48,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 158 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:56:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 05:56:48,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-20 05:56:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-20 05:56:48,473 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 41 [2021-11-20 05:56:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:48,473 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-20 05:56:48,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-20 05:56:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:56:48,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:48,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:48,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 05:56:48,475 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2066036839, now seen corresponding path program 1 times [2021-11-20 05:56:48,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:48,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666480601] [2021-11-20 05:56:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:48,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:56:48,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666480601] [2021-11-20 05:56:48,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666480601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:56:48,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:56:48,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-20 05:56:48,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861317923] [2021-11-20 05:56:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:56:48,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:56:48,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:56:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:56:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-20 05:56:48,887 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:56:49,721 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-11-20 05:56:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:56:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 05:56:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:56:49,722 INFO L225 Difference]: With dead ends: 82 [2021-11-20 05:56:49,722 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 05:56:49,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:56:49,723 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 253 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:56:49,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 209 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 05:56:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 05:56:49,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2021-11-20 05:56:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-11-20 05:56:49,727 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 44 [2021-11-20 05:56:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:56:49,727 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-11-20 05:56:49,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:56:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-11-20 05:56:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:56:49,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:56:49,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:56:49,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 05:56:49,729 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-11-20 05:56:49,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:56:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash -377366918, now seen corresponding path program 1 times [2021-11-20 05:56:49,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:56:49,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469832064] [2021-11-20 05:56:49,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:49,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:56:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 05:56:50,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:56:50,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469832064] [2021-11-20 05:56:50,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469832064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:56:50,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105285503] [2021-11-20 05:56:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:56:50,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:56:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:56:50,289 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:56:50,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6780c61c-74f8-4f70-91fc-1baa96261e69/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 05:56:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:56:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 05:56:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:56:50,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:56:50,684 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 05:56:50,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 05:56:50,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-20 05:56:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-20 05:56:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-20 05:56:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:51,257 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-20 05:56:51,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 49 [2021-11-20 05:56:51,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 05:56:51,691 INFO L354 Elim1Store]: treesize reduction 128, result has 24.3 percent of original size [2021-11-20 05:56:51,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 74 treesize of output 79 [2021-11-20 05:56:51,990 INFO L354 Elim1Store]: treesize reduction 138, result has 19.3 percent of original size [2021-11-20 05:56:51,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 115 treesize of output 112 [2021-11-20 05:56:52,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 164 [2021-11-20 05:56:52,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2021-11-20 05:56:52,800 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-20 05:56:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 109 treesize of output 57 [2021-11-20 05:56:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:56:52,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:56:53,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2021-11-20 05:57:07,980 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 05:57:08,049 INFO L354 Elim1Store]: treesize reduction 5, result has 98.3 percent of original size [2021-11-20 05:57:08,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 156 treesize of output 301 [2021-11-20 05:57:10,015 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10#1.offset| Int) (v_arrayElimCell_43 Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base|) (+ |ULTIMATE.start_dll_prepend_#t~mem10#1.offset| 8) |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (and (= (select .cse0 (+ |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset| 4)) |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_dll_prepend_~head#1.offset|) (= |c_ULTIMATE.start_dll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (= (select .cse0 (+ 4 v_arrayElimCell_43)) |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base|)))) is different from false [2021-11-20 05:57:12,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10#1.offset| Int) (v_arrayElimCell_43 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse1 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 (store (select |c_#memory_$Pointer$.base| .cse0) (+ |ULTIMATE.start_dll_prepend_#t~mem10#1.offset| 8) |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))))) (select .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (and (= .cse0 (select .cse1 (+ |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset| 4))) (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_dll_prepend_~head#1.offset|) (= |c_ULTIMATE.start_dll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (= .cse0 (select .cse1 (+ 4 v_arrayElimCell_43))))))) is different from false [2021-11-20 05:58:45,430 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10#1.offset| Int) (v_arrayElimCell_43 Int) (|ULTIMATE.start_dll_prepend_~new_head~1#1.offset| Int)) (let ((.cse2 (+ |ULTIMATE.start_dll_prepend_~new_head~1#1.offset| 4))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res#1.base|) .cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse0 (select (select .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse1 (let ((.cse3 (let ((.cse4 (store .cse5 .cse0 (store (select .cse5 .cse0) (+ |ULTIMATE.start_dll_prepend_#t~mem10#1.offset| 8) |c_ULTIMATE.start_node_create_#res#1.base|)))) (store .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_#res#1.base|))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (and (= .cse0 (select .cse1 .cse2)) (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_dll_prepend_~head#1.offset|) (= |c_ULTIMATE.start_dll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (= (select .cse1 (+ 4 v_arrayElimCell_43)) .cse0))))))) is different from false [2021-11-20 05:59:56,645 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10#1.offset| Int) (v_arrayElimCell_43 Int) (v_DerPreprocessor_1 Int) (|ULTIMATE.start_dll_prepend_~new_head~1#1.offset| Int)) (let ((.cse2 (+ |ULTIMATE.start_dll_prepend_~new_head~1#1.offset| 4))) (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (let ((.cse6 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base|) |c_ULTIMATE.start_node_create_~temp~0#1.offset| v_DerPreprocessor_1))) (store .cse6 .cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse6) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|)))))) (let ((.cse1 (select (select .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse0 (let ((.cse3 (let ((.cse4 (store .cse5 .cse1 (store (select .cse5 .cse1) (+ |ULTIMATE.start_dll_prepend_#t~mem10#1.offset| 8) |c_ULTIMATE.start_node_create_~temp~0#1.base|)))) (store .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (= (select .cse0 (+ 4 v_arrayElimCell_43)) .cse1) (and (= |c_ULTIMATE.start_main_~#s~0#1.offset| |c_ULTIMATE.start_dll_prepend_~head#1.offset|) (= .cse1 (select .cse0 .cse2)) (= |c_ULTIMATE.start_dll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)))))))) is different from false [2021-11-20 06:01:14,007 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-11-20 06:01:14,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21616625 treesize of output 20387023