./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_insert_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_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/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_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/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_58f6cb0c-769e-4bc1-8314-1571228f71b8/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 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:23:02,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:23:02,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:23:02,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:23:02,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:23:02,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:23:02,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:23:02,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:23:02,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:23:02,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:23:02,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:23:02,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:23:02,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:23:02,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:23:02,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:23:02,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:23:02,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:23:02,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:23:02,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:23:02,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:23:02,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:23:02,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:23:02,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:23:02,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:23:02,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:23:02,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:23:02,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:23:02,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:23:02,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:23:02,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:23:02,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:23:02,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:23:02,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:23:02,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:23:02,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:23:02,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:23:02,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:23:02,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:23:02,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:23:02,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:23:02,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:23:02,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:23:02,274 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:23:02,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:23:02,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:23:02,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:23:02,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:23:02,276 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:23:02,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:23:02,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:23:02,277 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:23:02,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:23:02,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:23:02,278 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:23:02,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:23:02,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:23:02,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:23:02,279 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:23:02,279 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:23:02,280 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:23:02,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:23:02,280 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:23:02,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:23:02,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:23:02,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:23:02,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:23:02,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:23:02,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:23:02,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:23:02,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:23:02,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:23:02,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:23:02,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:23:02,283 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_58f6cb0c-769e-4bc1-8314-1571228f71b8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8eaca07dd267d84d5b5f55ad6096951e873362e33b975be77e0f552bdb4e3bcb [2021-11-20 07:23:02,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:23:02,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:23:02,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:23:02,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:23:02,627 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:23:02,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2021-11-20 07:23:02,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/data/5491970f1/17905545c9da4be1910ad0ebd2fe71fa/FLAGc2bff7621 [2021-11-20 07:23:03,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:23:03,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/sv-benchmarks/c/list-simple/sll2c_insert_equal.i [2021-11-20 07:23:03,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/data/5491970f1/17905545c9da4be1910ad0ebd2fe71fa/FLAGc2bff7621 [2021-11-20 07:23:03,556 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/data/5491970f1/17905545c9da4be1910ad0ebd2fe71fa [2021-11-20 07:23:03,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:23:03,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:23:03,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:23:03,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:23:03,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:23:03,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:23:03" (1/1) ... [2021-11-20 07:23:03,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b57b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:03, skipping insertion in model container [2021-11-20 07:23:03,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:23:03" (1/1) ... [2021-11-20 07:23:03,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:23:03,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:23:03,941 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_58f6cb0c-769e-4bc1-8314-1571228f71b8/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2021-11-20 07:23:03,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:23:03,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:23:04,038 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_58f6cb0c-769e-4bc1-8314-1571228f71b8/sv-benchmarks/c/list-simple/sll2c_insert_equal.i[24601,24614] [2021-11-20 07:23:04,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:23:04,069 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:23:04,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04 WrapperNode [2021-11-20 07:23:04,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:23:04,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:23:04,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:23:04,072 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:23:04,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,149 INFO L137 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 147 [2021-11-20 07:23:04,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:23:04,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:23:04,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:23:04,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:23:04,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:23:04,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:23:04,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:23:04,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:23:04,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (1/1) ... [2021-11-20 07:23:04,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:23:04,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:04,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:23:04,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:23:04,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:23:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:23:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-20 07:23:04,282 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-20 07:23:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:23:04,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:23:04,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:23:04,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:23:04,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:23:04,448 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:23:04,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:23:04,916 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:23:04,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:23:04,930 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:23:04,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:23:04 BoogieIcfgContainer [2021-11-20 07:23:04,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:23:04,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:23:04,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:23:04,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:23:04,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:23:03" (1/3) ... [2021-11-20 07:23:04,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dce1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:23:04, skipping insertion in model container [2021-11-20 07:23:04,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:23:04" (2/3) ... [2021-11-20 07:23:04,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dce1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:23:04, skipping insertion in model container [2021-11-20 07:23:04,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:23:04" (3/3) ... [2021-11-20 07:23:04,945 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_insert_equal.i [2021-11-20 07:23:04,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:23:04,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2021-11-20 07:23:04,987 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:23:04,994 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 07:23:04,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2021-11-20 07:23:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 64 states have (on average 2.03125) internal successors, (130), 116 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:23:05,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:05,043 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:23:05,044 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:05,049 INFO L85 PathProgramCache]: Analyzing trace with hash 895367701, now seen corresponding path program 1 times [2021-11-20 07:23:05,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:05,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234735071] [2021-11-20 07:23:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:05,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:05,307 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 07:23:05,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234735071] [2021-11-20 07:23:05,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234735071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:05,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:05,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:23:05,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129215733] [2021-11-20 07:23:05,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:05,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:05,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:05,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:05,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:05,357 INFO L87 Difference]: Start difference. First operand has 121 states, 64 states have (on average 2.03125) internal successors, (130), 116 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:05,521 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2021-11-20 07:23:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:05,524 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 07:23:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:05,534 INFO L225 Difference]: With dead ends: 119 [2021-11-20 07:23:05,534 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 07:23:05,536 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 07:23:05,540 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:05,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 189 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 07:23:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-20 07:23:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-11-20 07:23:05,601 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 6 [2021-11-20 07:23:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:05,601 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-11-20 07:23:05,602 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-11-20 07:23:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:23:05,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:05,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:23:05,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:23:05,605 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:05,609 INFO L85 PathProgramCache]: Analyzing trace with hash 895367702, now seen corresponding path program 1 times [2021-11-20 07:23:05,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:05,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817283130] [2021-11-20 07:23:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:05,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:05,713 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 07:23:05,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:05,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817283130] [2021-11-20 07:23:05,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817283130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:05,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:05,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:23:05,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390390387] [2021-11-20 07:23:05,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:05,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:23:05,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:23:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:23:05,719 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:05,825 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-20 07:23:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:23:05,826 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 07:23:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:05,832 INFO L225 Difference]: With dead ends: 114 [2021-11-20 07:23:05,832 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 07:23:05,837 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 07:23:05,839 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:05,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 191 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 07:23:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-20 07:23:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.8870967741935485) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2021-11-20 07:23:05,865 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 6 [2021-11-20 07:23:05,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:05,867 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2021-11-20 07:23:05,868 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2021-11-20 07:23:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:23:05,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:05,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:05,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:23:05,870 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:05,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1575141079, now seen corresponding path program 1 times [2021-11-20 07:23:05,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:05,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812661349] [2021-11-20 07:23:05,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:05,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:05,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:05,979 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 07:23:05,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:05,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812661349] [2021-11-20 07:23:05,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812661349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:05,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:05,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:23:05,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91462878] [2021-11-20 07:23:05,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:05,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:23:05,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:05,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:23:05,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:23:05,983 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:23:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:06,095 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-11-20 07:23:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:23:06,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 07:23:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:06,097 INFO L225 Difference]: With dead ends: 121 [2021-11-20 07:23:06,097 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 07:23:06,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:23:06,099 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 5 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:06,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 284 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 07:23:06,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2021-11-20 07:23:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 63 states have (on average 1.873015873015873) internal successors, (118), 110 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-11-20 07:23:06,110 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 13 [2021-11-20 07:23:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:06,111 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-11-20 07:23:06,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:23:06,111 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-11-20 07:23:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:23:06,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:06,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:06,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:23:06,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1331086820, now seen corresponding path program 1 times [2021-11-20 07:23:06,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:06,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822829843] [2021-11-20 07:23:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:06,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:23:06,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822829843] [2021-11-20 07:23:06,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822829843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:06,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:06,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:23:06,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955173162] [2021-11-20 07:23:06,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:06,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:23:06,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:23:06,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:23:06,226 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:23:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:06,491 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-20 07:23:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:23:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-20 07:23:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:06,494 INFO L225 Difference]: With dead ends: 115 [2021-11-20 07:23:06,494 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 07:23:06,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:06,496 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 13 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:06,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 405 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:23:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 07:23:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-11-20 07:23:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2021-11-20 07:23:06,505 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 22 [2021-11-20 07:23:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:06,506 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2021-11-20 07:23:06,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:23:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2021-11-20 07:23:06,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:23:06,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:06,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:06,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:23:06,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1331086819, now seen corresponding path program 1 times [2021-11-20 07:23:06,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:06,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102759539] [2021-11-20 07:23:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:06,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:23:06,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:06,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102759539] [2021-11-20 07:23:06,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102759539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:06,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:23:06,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116452728] [2021-11-20 07:23:06,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:23:06,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:23:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:23:06,629 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:23:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:06,870 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-11-20 07:23:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:23:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-20 07:23:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:06,872 INFO L225 Difference]: With dead ends: 114 [2021-11-20 07:23:06,872 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 07:23:06,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:06,874 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 11 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:06,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 429 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:23:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 07:23:06,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-20 07:23:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 63 states have (on average 1.8412698412698412) internal successors, (116), 108 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-11-20 07:23:06,882 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 22 [2021-11-20 07:23:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:06,882 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-11-20 07:23:06,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:23:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-11-20 07:23:06,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:23:06,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:06,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:06,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:23:06,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1025578181, now seen corresponding path program 1 times [2021-11-20 07:23:06,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:06,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160080848] [2021-11-20 07:23:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:06,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:06,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:23:07,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:07,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160080848] [2021-11-20 07:23:07,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160080848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:07,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398238008] [2021-11-20 07:23:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:07,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:07,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:07,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:23:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:07,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:23:07,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:07,181 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 07:23:07,383 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:23:07,384 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 12 treesize of output 14 [2021-11-20 07:23:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:23:07,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:23:07,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398238008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:07,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:23:07,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2021-11-20 07:23:07,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363936974] [2021-11-20 07:23:07,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:07,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:23:07,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:23:07,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:23:07,481 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:23:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:07,808 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-11-20 07:23:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:23:07,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-20 07:23:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:07,810 INFO L225 Difference]: With dead ends: 132 [2021-11-20 07:23:07,810 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 07:23:07,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:23:07,812 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 102 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:07,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 517 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:23:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 07:23:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-11-20 07:23:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 63 states have (on average 1.8253968253968254) internal successors, (115), 107 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2021-11-20 07:23:07,819 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 25 [2021-11-20 07:23:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:07,820 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2021-11-20 07:23:07,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:23:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2021-11-20 07:23:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:23:07,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:07,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:07,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:08,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:23:08,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1025578182, now seen corresponding path program 1 times [2021-11-20 07:23:08,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:08,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615207827] [2021-11-20 07:23:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:08,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:08,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:23:08,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615207827] [2021-11-20 07:23:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615207827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745050143] [2021-11-20 07:23:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:08,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:08,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:08,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:08,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:23:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:08,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:23:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:08,342 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 07:23:08,346 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 07:23:08,664 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:23:08,665 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 11 treesize of output 11 [2021-11-20 07:23:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-20 07:23:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:23:08,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:23:08,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745050143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:08,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:23:08,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-20 07:23:08,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458122988] [2021-11-20 07:23:08,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:23:08,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:23:08,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:23:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:23:08,999 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 13 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:23:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:09,409 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-11-20 07:23:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:23:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 13 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2021-11-20 07:23:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:09,411 INFO L225 Difference]: With dead ends: 118 [2021-11-20 07:23:09,411 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 07:23:09,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:23:09,412 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:09,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 719 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 522 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2021-11-20 07:23:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 07:23:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-11-20 07:23:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.8095238095238095) internal successors, (114), 106 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-11-20 07:23:09,431 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 25 [2021-11-20 07:23:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:09,432 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-11-20 07:23:09,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 13 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:23:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-11-20 07:23:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:23:09,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:09,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:09,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:09,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:23:09,657 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash 131514271, now seen corresponding path program 1 times [2021-11-20 07:23:09,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:09,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526439897] [2021-11-20 07:23:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:09,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:23:09,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526439897] [2021-11-20 07:23:09,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526439897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:09,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401749685] [2021-11-20 07:23:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:09,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:09,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:09,941 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:09,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:23:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:10,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:23:10,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:10,071 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 07:23:10,088 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 11 treesize of output 9 [2021-11-20 07:23:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:10,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-11-20 07:23:10,353 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:23:10,354 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 07:23:10,678 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:23:10,678 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 07:23:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:23:10,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:23:29,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401749685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:29,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:23:29,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-11-20 07:23:29,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786413864] [2021-11-20 07:23:29,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:23:29,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:23:29,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:23:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=573, Unknown=5, NotChecked=0, Total=702 [2021-11-20 07:23:29,367 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:23:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:32,004 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2021-11-20 07:23:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:23:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2021-11-20 07:23:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:32,006 INFO L225 Difference]: With dead ends: 170 [2021-11-20 07:23:32,006 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 07:23:32,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=176, Invalid=810, Unknown=6, NotChecked=0, Total=992 [2021-11-20 07:23:32,007 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 123 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:32,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 1092 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 582 Invalid, 0 Unknown, 339 Unchecked, 0.5s Time] [2021-11-20 07:23:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 07:23:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 105. [2021-11-20 07:23:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.7142857142857142) internal successors, (108), 100 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2021-11-20 07:23:32,013 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 37 [2021-11-20 07:23:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2021-11-20 07:23:32,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:23:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2021-11-20 07:23:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:23:32,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:32,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:32,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:32,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:32,235 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:32,235 INFO L85 PathProgramCache]: Analyzing trace with hash 131514272, now seen corresponding path program 1 times [2021-11-20 07:23:32,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:32,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910099634] [2021-11-20 07:23:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:32,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:32,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:32,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:32,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:32,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910099634] [2021-11-20 07:23:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910099634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:32,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:32,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:23:32,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106998222] [2021-11-20 07:23:32,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:32,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:23:32,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:23:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:23:32,515 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:32,849 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-11-20 07:23:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:23:32,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-20 07:23:32,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:32,850 INFO L225 Difference]: With dead ends: 115 [2021-11-20 07:23:32,851 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 07:23:32,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:23:32,851 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 198 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:32,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 222 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:23:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 07:23:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2021-11-20 07:23:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 92 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-11-20 07:23:32,856 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 37 [2021-11-20 07:23:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:32,857 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-11-20 07:23:32,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-11-20 07:23:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:23:32,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:32,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:32,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:23:32,859 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash 931477670, now seen corresponding path program 1 times [2021-11-20 07:23:32,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:32,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906017173] [2021-11-20 07:23:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:32,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:33,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:33,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:33,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:23:33,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906017173] [2021-11-20 07:23:33,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906017173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168234228] [2021-11-20 07:23:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:33,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:33,260 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:33,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:23:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:23:33,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:33,634 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 13 treesize of output 9 [2021-11-20 07:23:35,921 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:23:35,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 36 [2021-11-20 07:23:35,941 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 07:23:35,941 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 33 treesize of output 41 [2021-11-20 07:23:36,052 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:23:36,053 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 42 treesize of output 26 [2021-11-20 07:23:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:23:36,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:23:36,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168234228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:36,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:23:36,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 28 [2021-11-20 07:23:36,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570176090] [2021-11-20 07:23:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:36,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:23:36,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:23:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=721, Unknown=1, NotChecked=0, Total=812 [2021-11-20 07:23:36,151 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:36,472 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2021-11-20 07:23:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:23:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2021-11-20 07:23:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:36,473 INFO L225 Difference]: With dead ends: 104 [2021-11-20 07:23:36,473 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 07:23:36,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=124, Invalid=867, Unknown=1, NotChecked=0, Total=992 [2021-11-20 07:23:36,475 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 15 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:36,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 669 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 348 Invalid, 0 Unknown, 192 Unchecked, 0.3s Time] [2021-11-20 07:23:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 07:23:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2021-11-20 07:23:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.6) internal successors, (104), 94 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2021-11-20 07:23:36,480 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 40 [2021-11-20 07:23:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:36,480 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2021-11-20 07:23:36,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2021-11-20 07:23:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 07:23:36,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:36,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:36,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:36,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:23:36,707 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash 931477671, now seen corresponding path program 1 times [2021-11-20 07:23:36,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:36,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761765795] [2021-11-20 07:23:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:36,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:36,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:36,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:23:37,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:37,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761765795] [2021-11-20 07:23:37,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761765795] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:37,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978324711] [2021-11-20 07:23:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:37,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:37,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:37,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:37,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:23:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 07:23:37,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:37,501 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 07:23:37,889 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 29 treesize of output 21 [2021-11-20 07:23:37,894 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 11 treesize of output 7 [2021-11-20 07:23:40,265 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:23:40,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 70 [2021-11-20 07:23:40,297 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-20 07:23:40,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 59 [2021-11-20 07:23:40,308 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:23:40,308 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 56 treesize of output 56 [2021-11-20 07:23:40,321 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:23:40,321 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 50 treesize of output 52 [2021-11-20 07:23:40,471 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:23:40,471 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 63 treesize of output 51 [2021-11-20 07:23:40,477 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:23:40,478 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 45 treesize of output 29 [2021-11-20 07:23:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:23:40,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:23:43,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978324711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:43,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:23:43,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-11-20 07:23:43,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634414320] [2021-11-20 07:23:43,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:23:43,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:23:43,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:23:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1071, Unknown=2, NotChecked=0, Total=1190 [2021-11-20 07:23:43,050 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:23:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:47,834 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2021-11-20 07:23:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:23:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-11-20 07:23:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:47,836 INFO L225 Difference]: With dead ends: 105 [2021-11-20 07:23:47,836 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 07:23:47,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=182, Invalid=1536, Unknown=4, NotChecked=0, Total=1722 [2021-11-20 07:23:47,838 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 34 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:47,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1044 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 634 Invalid, 0 Unknown, 142 Unchecked, 0.5s Time] [2021-11-20 07:23:47,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 07:23:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-11-20 07:23:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 94 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-11-20 07:23:47,842 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 40 [2021-11-20 07:23:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:47,842 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-11-20 07:23:47,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:23:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-11-20 07:23:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:23:47,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:47,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:47,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:48,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 07:23:48,055 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1188964921, now seen corresponding path program 1 times [2021-11-20 07:23:48,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:48,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556913025] [2021-11-20 07:23:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:48,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:48,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556913025] [2021-11-20 07:23:48,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556913025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:48,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:48,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:23:48,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129543134] [2021-11-20 07:23:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:48,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:23:48,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:48,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:23:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:23:48,123 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:48,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:48,205 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-11-20 07:23:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:23:48,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-20 07:23:48,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:48,207 INFO L225 Difference]: With dead ends: 144 [2021-11-20 07:23:48,207 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 07:23:48,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:23:48,208 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 66 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:48,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 226 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 07:23:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 100. [2021-11-20 07:23:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 95 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-11-20 07:23:48,213 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 41 [2021-11-20 07:23:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:48,215 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-11-20 07:23:48,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-11-20 07:23:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:23:48,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:48,219 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:48,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:23:48,219 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:48,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1188964665, now seen corresponding path program 1 times [2021-11-20 07:23:48,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:48,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782065493] [2021-11-20 07:23:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:48,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:48,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782065493] [2021-11-20 07:23:48,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782065493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:48,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:48,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:23:48,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118659739] [2021-11-20 07:23:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:48,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:23:48,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:48,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:23:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:23:48,290 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:48,400 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-11-20 07:23:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:23:48,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-20 07:23:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:48,401 INFO L225 Difference]: With dead ends: 117 [2021-11-20 07:23:48,401 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 07:23:48,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:23:48,402 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 72 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:48,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 146 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 07:23:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2021-11-20 07:23:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 94 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-11-20 07:23:48,409 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 41 [2021-11-20 07:23:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:48,409 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-11-20 07:23:48,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-11-20 07:23:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:23:48,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:48,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:48,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:23:48,414 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:48,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:48,414 INFO L85 PathProgramCache]: Analyzing trace with hash -133740632, now seen corresponding path program 1 times [2021-11-20 07:23:48,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:48,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287339525] [2021-11-20 07:23:48,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:48,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:23:48,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:48,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287339525] [2021-11-20 07:23:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287339525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:48,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:48,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:23:48,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872637100] [2021-11-20 07:23:48,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:48,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:23:48,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:23:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:23:48,513 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:48,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:48,710 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2021-11-20 07:23:48,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:23:48,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-11-20 07:23:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:48,712 INFO L225 Difference]: With dead ends: 114 [2021-11-20 07:23:48,712 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 07:23:48,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:48,712 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 70 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:48,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 281 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:23:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 07:23:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-11-20 07:23:48,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.5151515151515151) internal successors, (100), 91 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-11-20 07:23:48,716 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 43 [2021-11-20 07:23:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:48,716 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-11-20 07:23:48,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-11-20 07:23:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:23:48,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:48,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:48,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:23:48,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -133740631, now seen corresponding path program 1 times [2021-11-20 07:23:48,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:48,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331035066] [2021-11-20 07:23:48,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:48,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:48,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:48,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331035066] [2021-11-20 07:23:48,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331035066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:48,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:48,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:23:48,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846801] [2021-11-20 07:23:48,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:48,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:48,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:48,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:48,814 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:48,905 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-11-20 07:23:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:23:48,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-20 07:23:48,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:48,906 INFO L225 Difference]: With dead ends: 95 [2021-11-20 07:23:48,906 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 07:23:48,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:23:48,907 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 83 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:48,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 235 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 07:23:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-20 07:23:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.5076923076923077) internal successors, (98), 90 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:48,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-11-20 07:23:48,911 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 43 [2021-11-20 07:23:48,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:48,911 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-11-20 07:23:48,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-11-20 07:23:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:23:48,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:48,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 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 07:23:48,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 07:23:48,912 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -132415732, now seen corresponding path program 1 times [2021-11-20 07:23:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904784528] [2021-11-20 07:23:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:48,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:49,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:49,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904784528] [2021-11-20 07:23:49,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904784528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:49,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:49,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:23:49,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015777148] [2021-11-20 07:23:49,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:49,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:23:49,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:49,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:23:49,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:23:49,037 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:49,137 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-11-20 07:23:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:23:49,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-20 07:23:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:49,138 INFO L225 Difference]: With dead ends: 92 [2021-11-20 07:23:49,139 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 07:23:49,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:49,139 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 216 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:49,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 168 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 07:23:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 07:23:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.46875) internal successors, (94), 87 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-20 07:23:49,144 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 43 [2021-11-20 07:23:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:49,144 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-20 07:23:49,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-20 07:23:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:23:49,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:49,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:49,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 07:23:49,146 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash 190077985, now seen corresponding path program 1 times [2021-11-20 07:23:49,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:49,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073234845] [2021-11-20 07:23:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:49,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:49,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073234845] [2021-11-20 07:23:49,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073234845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:49,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:49,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:23:49,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800943539] [2021-11-20 07:23:49,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:49,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:49,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:49,223 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:49,343 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-20 07:23:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:23:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-20 07:23:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:49,345 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:23:49,345 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:23:49,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:23:49,346 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 64 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:49,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 193 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:23:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-11-20 07:23:49,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 64 states have (on average 1.453125) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-20 07:23:49,350 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 44 [2021-11-20 07:23:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:49,350 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-20 07:23:49,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-20 07:23:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:23:49,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:49,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:49,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 07:23:49,351 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash 190077986, now seen corresponding path program 1 times [2021-11-20 07:23:49,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:49,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081085884] [2021-11-20 07:23:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:49,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:23:49,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:49,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081085884] [2021-11-20 07:23:49,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081085884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:49,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:49,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:23:49,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994263303] [2021-11-20 07:23:49,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:49,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:49,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:49,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:49,429 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:49,549 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-20 07:23:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:23:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-20 07:23:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:49,551 INFO L225 Difference]: With dead ends: 90 [2021-11-20 07:23:49,551 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:23:49,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:23:49,552 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:49,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 188 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:23:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-20 07:23:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.4375) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-11-20 07:23:49,558 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 44 [2021-11-20 07:23:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-11-20 07:23:49,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-11-20 07:23:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 07:23:49,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:49,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:49,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:23:49,560 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1597450267, now seen corresponding path program 1 times [2021-11-20 07:23:49,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:49,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685607719] [2021-11-20 07:23:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:49,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:23:49,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:49,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685607719] [2021-11-20 07:23:49,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685607719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:49,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:49,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:23:49,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427882830] [2021-11-20 07:23:49,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:49,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:23:49,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:23:49,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:23:49,659 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:49,808 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-11-20 07:23:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:23:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-20 07:23:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:49,809 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:23:49,809 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 07:23:49,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:23:49,810 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 64 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:49,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 288 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 07:23:49,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 07:23:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.390625) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-11-20 07:23:49,814 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 45 [2021-11-20 07:23:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:49,815 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-11-20 07:23:49,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:23:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-11-20 07:23:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:23:49,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:49,817 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:49,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 07:23:49,817 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1846382939, now seen corresponding path program 1 times [2021-11-20 07:23:49,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:49,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616261352] [2021-11-20 07:23:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:49,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 07:23:49,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:49,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616261352] [2021-11-20 07:23:49,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616261352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:49,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:49,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:23:49,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726884700] [2021-11-20 07:23:49,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:49,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:49,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:49,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:49,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:49,880 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:49,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:49,980 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2021-11-20 07:23:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:23:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-20 07:23:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:49,982 INFO L225 Difference]: With dead ends: 104 [2021-11-20 07:23:49,982 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 07:23:49,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:23:49,983 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 138 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:49,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 156 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:23:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 07:23:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-11-20 07:23:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.375) internal successors, (88), 81 states have internal predecessors, (88), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-11-20 07:23:49,987 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 47 [2021-11-20 07:23:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:49,987 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-11-20 07:23:49,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-11-20 07:23:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:23:49,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:49,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:49,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 07:23:49,988 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 552513247, now seen corresponding path program 1 times [2021-11-20 07:23:49,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:49,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296467260] [2021-11-20 07:23:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:49,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:50,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:50,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:50,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:23:50,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:50,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296467260] [2021-11-20 07:23:50,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296467260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:50,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079511055] [2021-11-20 07:23:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:50,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:50,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:50,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:23:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:50,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-20 07:23:50,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:50,892 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 15 treesize of output 11 [2021-11-20 07:23:54,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:54,710 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:23:54,711 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 1 case distinctions, treesize of input 38 treesize of output 26 [2021-11-20 07:23:54,723 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:23:54,724 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 23 treesize of output 25 [2021-11-20 07:23:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:55,012 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-20 07:23:55,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 46 [2021-11-20 07:23:55,204 INFO L354 Elim1Store]: treesize reduction 76, result has 37.7 percent of original size [2021-11-20 07:23:55,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 78 [2021-11-20 07:23:55,416 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 27 treesize of output 19 [2021-11-20 07:23:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:23:55,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:23:55,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079511055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:55,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:23:55,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [23] total 36 [2021-11-20 07:23:55,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224579059] [2021-11-20 07:23:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:55,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:23:55,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:23:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1223, Unknown=2, NotChecked=0, Total=1332 [2021-11-20 07:23:55,444 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:55,775 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-11-20 07:23:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:23:55,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2021-11-20 07:23:55,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:55,776 INFO L225 Difference]: With dead ends: 93 [2021-11-20 07:23:55,776 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 07:23:55,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=129, Invalid=1429, Unknown=2, NotChecked=0, Total=1560 [2021-11-20 07:23:55,778 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 25 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:55,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 608 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 397 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2021-11-20 07:23:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 07:23:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-11-20 07:23:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:23:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-11-20 07:23:55,782 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 49 [2021-11-20 07:23:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:55,783 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-11-20 07:23:55,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:23:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-11-20 07:23:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:23:55,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:55,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:23:55,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:23:55,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:23:55,985 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:23:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:55,985 INFO L85 PathProgramCache]: Analyzing trace with hash 552513248, now seen corresponding path program 1 times [2021-11-20 07:23:55,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:55,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302559228] [2021-11-20 07:23:55,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:55,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:23:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:23:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:23:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:23:56,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:56,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302559228] [2021-11-20 07:23:56,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302559228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:23:56,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620054488] [2021-11-20 07:23:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:56,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:23:56,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:23:56,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:23:56,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:23:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:57,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-20 07:23:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:23:57,146 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 07:23:57,739 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 38 treesize of output 26 [2021-11-20 07:23:57,744 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 26 treesize of output 24 [2021-11-20 07:23:57,749 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 21 treesize of output 19 [2021-11-20 07:23:57,753 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 11 treesize of output 7 [2021-11-20 07:23:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:58,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 41 [2021-11-20 07:23:58,221 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 07:23:58,221 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 46 treesize of output 48 [2021-11-20 07:23:58,230 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:23:58,230 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 45 treesize of output 45 [2021-11-20 07:23:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:58,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-11-20 07:23:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:59,043 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 07:23:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 82 [2021-11-20 07:23:59,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:23:59,071 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 07:23:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 67 [2021-11-20 07:23:59,317 INFO L354 Elim1Store]: treesize reduction 92, result has 22.7 percent of original size [2021-11-20 07:23:59,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 115 [2021-11-20 07:23:59,354 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-20 07:23:59,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 110 treesize of output 107 [2021-11-20 07:23:59,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:23:59,717 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 100 treesize of output 64 [2021-11-20 07:23:59,723 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:23:59,724 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 61 treesize of output 49 [2021-11-20 07:23:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:23:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:24:02,819 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| Int)) (or (< |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) (and (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.base| Int) (v_subst_1 Int)) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) |c_ULTIMATE.start_sll_circular_insert_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_subst_1))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) |c_ULTIMATE.start_sll_circular_insert_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_subst_2 Int)) (<= 0 (+ (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) |c_ULTIMATE.start_sll_circular_insert_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_subst_2))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))))) is different from false [2021-11-20 07:24:04,863 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| Int)) (or (< |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) (and (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.base| Int) (v_subst_1 Int)) (<= (+ 8 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_subst_1))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_subst_2 Int)) (<= 0 (+ (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_subst_2))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))))) is different from false [2021-11-20 07:24:06,922 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| Int)) (or (and (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.base| Int) (v_subst_1 Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|))) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_subst_1))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_subst_2 Int)) (<= 0 (+ (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse3 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_subst_2))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))) (< (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|))) is different from false [2021-11-20 07:24:08,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| Int)) (or (and (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.base| Int) (v_subst_1 Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|))) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) .cse1 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.offset|)))) (store .cse0 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base|) |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.offset| v_subst_1))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) .cse1 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base|) |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (forall ((v_subst_2 Int)) (<= 0 (+ (select (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13| (store (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|) |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.offset|)))) (store .cse3 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base| (store (select .cse3 |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.base|) |c_ULTIMATE.start_sll_circular_insert_#t~ret9#1.offset| v_subst_2))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))) (< (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|) |v_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base_13|))) is different from false [2021-11-20 07:24:09,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620054488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:09,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:24:09,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-11-20 07:24:09,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243447094] [2021-11-20 07:24:09,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:09,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:24:09,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:09,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:24:09,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2451, Unknown=4, NotChecked=412, Total=3080 [2021-11-20 07:24:09,690 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 46 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 40 states have internal predecessors, (79), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:24:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:14,489 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2021-11-20 07:24:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:24:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 40 states have internal predecessors, (79), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2021-11-20 07:24:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:14,491 INFO L225 Difference]: With dead ends: 129 [2021-11-20 07:24:14,491 INFO L226 Difference]: Without dead ends: 129 [2021-11-20 07:24:14,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=448, Invalid=4394, Unknown=4, NotChecked=556, Total=5402 [2021-11-20 07:24:14,493 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 203 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:14,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1472 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1519 Invalid, 0 Unknown, 80 Unchecked, 1.6s Time] [2021-11-20 07:24:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-20 07:24:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2021-11-20 07:24:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.338235294117647) internal successors, (91), 84 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:24:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-11-20 07:24:14,498 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 49 [2021-11-20 07:24:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:14,498 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-11-20 07:24:14,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 40 states have internal predecessors, (79), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:24:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-11-20 07:24:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:24:14,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:14,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 07:24:14,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:24:14,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:14,712 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:24:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:14,713 INFO L85 PathProgramCache]: Analyzing trace with hash -220833143, now seen corresponding path program 1 times [2021-11-20 07:24:14,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:14,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922667545] [2021-11-20 07:24:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:14,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:24:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:24:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:24:14,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:14,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922667545] [2021-11-20 07:24:14,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922667545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:14,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756246343] [2021-11-20 07:24:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:14,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:14,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:14,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:24:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:14,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:24:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:15,043 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 29 treesize of output 21 [2021-11-20 07:24:15,046 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 18 treesize of output 10 [2021-11-20 07:24:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:24:15,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:24:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:24:15,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756246343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:24:15,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:24:15,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2021-11-20 07:24:15,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359549133] [2021-11-20 07:24:15,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:15,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:24:15,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:24:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:24:15,321 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:24:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:15,465 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-20 07:24:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:24:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-20 07:24:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:15,467 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:24:15,467 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:24:15,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:24:15,468 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 10 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 414 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 07:24:15,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 414 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:24:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:24:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-20 07:24:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 76 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:24:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-11-20 07:24:15,472 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 50 [2021-11-20 07:24:15,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:15,472 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-11-20 07:24:15,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:24:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-11-20 07:24:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:24:15,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:15,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2021-11-20 07:24:15,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 07:24:15,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:15,695 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:24:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:15,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1610711870, now seen corresponding path program 1 times [2021-11-20 07:24:15,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:24:15,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538589331] [2021-11-20 07:24:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:15,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:24:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:16,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:24:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:16,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:24:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:16,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:24:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:24:17,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:24:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538589331] [2021-11-20 07:24:17,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538589331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:17,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740942822] [2021-11-20 07:24:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:24:17,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:24:17,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:24:17,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:24:17,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:24:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:24:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-20 07:24:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:17,414 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 07:24:17,691 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 13 treesize of output 9 [2021-11-20 07:24:17,856 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:24:17,856 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 11 treesize of output 11 [2021-11-20 07:24:18,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 07:24:18,235 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 07:24:18,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 07:24:18,594 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 40 treesize of output 28 [2021-11-20 07:24:18,599 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 28 treesize of output 26 [2021-11-20 07:24:18,609 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 23 treesize of output 19 [2021-11-20 07:24:18,614 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 11 treesize of output 7 [2021-11-20 07:24:43,248 INFO L354 Elim1Store]: treesize reduction 108, result has 15.0 percent of original size [2021-11-20 07:24:43,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 105 [2021-11-20 07:24:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:24:43,264 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:24:43,264 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 1 case distinctions, treesize of input 86 treesize of output 66 [2021-11-20 07:24:43,273 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:24:43,274 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 71 treesize of output 71 [2021-11-20 07:24:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:24:43,286 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:24:43,286 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 1 case distinctions, treesize of input 65 treesize of output 53 [2021-11-20 07:24:44,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:24:44,198 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-20 07:24:44,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 100 [2021-11-20 07:24:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:24:44,228 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-20 07:24:44,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 108 [2021-11-20 07:24:44,233 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 99 treesize of output 75 [2021-11-20 07:24:44,437 INFO L354 Elim1Store]: treesize reduction 92, result has 22.0 percent of original size [2021-11-20 07:24:44,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 122 [2021-11-20 07:24:44,498 INFO L354 Elim1Store]: treesize reduction 168, result has 18.4 percent of original size [2021-11-20 07:24:44,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 189 treesize of output 169 [2021-11-20 07:24:44,515 INFO L354 Elim1Store]: treesize reduction 89, result has 11.0 percent of original size [2021-11-20 07:24:44,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 114 [2021-11-20 07:24:44,696 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:24:44,696 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 42 [2021-11-20 07:24:44,702 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 27 treesize of output 19 [2021-11-20 07:24:44,855 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 15 treesize of output 7 [2021-11-20 07:24:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:24:44,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:24:47,057 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.offset| Int) (|ULTIMATE.start_sll_circular_insert_~last~1#1.base| Int) (v_DerPreprocessor_6 Int)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| v_DerPreprocessor_6)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.offset|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))) is different from false [2021-11-20 07:24:54,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740942822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:24:54,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:24:54,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 58 [2021-11-20 07:24:54,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032599763] [2021-11-20 07:24:54,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:54,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-20 07:24:54,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:24:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-20 07:24:54,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4060, Unknown=11, NotChecked=128, Total=4422 [2021-11-20 07:24:54,656 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 58 states, 54 states have (on average 1.537037037037037) internal successors, (83), 49 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:25:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:25:04,291 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-11-20 07:25:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:25:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 54 states have (on average 1.537037037037037) internal successors, (83), 49 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2021-11-20 07:25:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:25:04,296 INFO L225 Difference]: With dead ends: 109 [2021-11-20 07:25:04,296 INFO L226 Difference]: Without dead ends: 109 [2021-11-20 07:25:04,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=302, Invalid=5239, Unknown=13, NotChecked=146, Total=5700 [2021-11-20 07:25:04,300 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:25:04,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1360 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 994 Invalid, 0 Unknown, 95 Unchecked, 0.8s Time] [2021-11-20 07:25:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-20 07:25:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-11-20 07:25:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 98 states have internal predecessors, (106), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:25:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-20 07:25:04,307 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 51 [2021-11-20 07:25:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:25:04,308 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-20 07:25:04,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 54 states have (on average 1.537037037037037) internal successors, (83), 49 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:25:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-20 07:25:04,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:25:04,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:25:04,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2021-11-20 07:25:04,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:25:04,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:04,526 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:25:04,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:25:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1610711871, now seen corresponding path program 1 times [2021-11-20 07:25:04,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:25:04,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330105511] [2021-11-20 07:25:04,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:04,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:25:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:04,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:25:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:04,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:25:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:05,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:25:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:25:05,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:25:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330105511] [2021-11-20 07:25:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330105511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:25:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573124519] [2021-11-20 07:25:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:25:05,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:25:05,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:25:05,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:25:05,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:25:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:25:05,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-20 07:25:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:25:06,276 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 18 treesize of output 14 [2021-11-20 07:25:06,279 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 11 treesize of output 7 [2021-11-20 07:25:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:25:24,626 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:25:24,626 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 1 case distinctions, treesize of input 61 treesize of output 49 [2021-11-20 07:25:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:25:24,639 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:25:24,639 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 1 case distinctions, treesize of input 46 treesize of output 34 [2021-11-20 07:25:24,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:25:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 07:25:25,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:25:25,184 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-11-20 07:25:25,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 41 [2021-11-20 07:25:25,434 INFO L354 Elim1Store]: treesize reduction 76, result has 37.7 percent of original size [2021-11-20 07:25:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 76 [2021-11-20 07:25:25,776 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 15 treesize of output 7 [2021-11-20 07:25:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:25:25,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:25:25,986 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 7 treesize of output 5 [2021-11-20 07:26:29,796 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.offset| Int) (|ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| Int) (|ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| Int)) (<= 0 (select (select (let ((.cse0 (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|))) (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) |ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|))))) (store .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse0 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-11-20 07:27:01,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_11 Int) (v_DerPreprocessor_12 Int) (|ULTIMATE.start_sll_circular_insert_~last~1#1.offset| Int) (|v_node_create_~temp~0#1.offset_43| Int) (|v_node_create_~temp~0#1.base_45| Int) (|ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| Int) (|ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| Int)) (or (<= |c_#StackHeapBarrier| |v_node_create_~temp~0#1.base_45|) (<= 0 (select (select (let ((.cse0 (let ((.cse3 (+ |v_node_create_~temp~0#1.offset_43| 4))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_45| (store (store (select |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_45|) |v_node_create_~temp~0#1.offset_43| 0) .cse3 v_DerPreprocessor_12))) (.cse2 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_45| (store (store (select |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_45|) |v_node_create_~temp~0#1.offset_43| 0) .cse3 v_DerPreprocessor_11)) |c_ULTIMATE.start_sll_circular_insert_~head#1.base|) |c_ULTIMATE.start_sll_circular_insert_~head#1.offset|))) (store .cse1 .cse2 (store (select .cse1 .cse2) |ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))))) (store .cse0 |v_node_create_~temp~0#1.base_45| (store (select .cse0 |v_node_create_~temp~0#1.base_45|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-11-20 07:27:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573124519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:01,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:27:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-11-20 07:27:01,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776578363] [2021-11-20 07:27:01,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:01,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 07:27:01,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:01,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 07:27:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2629, Unknown=39, NotChecked=210, Total=3080 [2021-11-20 07:27:01,324 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 41 states have internal predecessors, (83), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:14,866 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2021-11-20 07:27:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:27:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 41 states have internal predecessors, (83), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2021-11-20 07:27:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:14,868 INFO L225 Difference]: With dead ends: 147 [2021-11-20 07:27:14,868 INFO L226 Difference]: Without dead ends: 147 [2021-11-20 07:27:14,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 128.4s TimeCoverageRelationStatistics Valid=388, Invalid=4980, Unknown=42, NotChecked=290, Total=5700 [2021-11-20 07:27:14,870 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 142 mSDsluCounter, 1570 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:14,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1630 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 678 Invalid, 0 Unknown, 123 Unchecked, 0.4s Time] [2021-11-20 07:27:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-20 07:27:14,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 107. [2021-11-20 07:27:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 100 states have internal predecessors, (109), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:27:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2021-11-20 07:27:14,875 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 51 [2021-11-20 07:27:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:14,876 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2021-11-20 07:27:14,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 41 states have internal predecessors, (83), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:27:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2021-11-20 07:27:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:27:14,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:14,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2021-11-20 07:27:14,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:27:15,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:15,091 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:27:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -761382723, now seen corresponding path program 1 times [2021-11-20 07:27:15,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609264857] [2021-11-20 07:27:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:15,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:27:15,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609264857] [2021-11-20 07:27:15,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609264857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:15,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:27:15,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080084021] [2021-11-20 07:27:15,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:15,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:27:15,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:27:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:27:15,247 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:15,658 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-11-20 07:27:15,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:27:15,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-11-20 07:27:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:15,660 INFO L225 Difference]: With dead ends: 168 [2021-11-20 07:27:15,660 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 07:27:15,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:27:15,661 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 180 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:15,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 544 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 07:27:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 108. [2021-11-20 07:27:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 101 states have internal predecessors, (111), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:27:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2021-11-20 07:27:15,667 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 51 [2021-11-20 07:27:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:15,668 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2021-11-20 07:27:15,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2021-11-20 07:27:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:27:15,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:15,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2021-11-20 07:27:15,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-20 07:27:15,671 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:27:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash -761382722, now seen corresponding path program 1 times [2021-11-20 07:27:15,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:15,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020677575] [2021-11-20 07:27:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:15,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 07:27:15,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:15,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020677575] [2021-11-20 07:27:15,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020677575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:27:15,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:27:15,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 07:27:15,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136238529] [2021-11-20 07:27:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:27:15,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:27:15,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:27:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:27:15,889 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:16,281 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2021-11-20 07:27:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:27:16,282 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-11-20 07:27:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:16,283 INFO L225 Difference]: With dead ends: 150 [2021-11-20 07:27:16,283 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 07:27:16,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:27:16,284 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 113 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:16,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 603 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:27:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 07:27:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 104. [2021-11-20 07:27:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 83 states have (on average 1.2771084337349397) internal successors, (106), 97 states have internal predecessors, (106), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:27:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2021-11-20 07:27:16,289 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 51 [2021-11-20 07:27:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:16,289 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2021-11-20 07:27:16,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:27:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2021-11-20 07:27:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:27:16,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:16,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2021-11-20 07:27:16,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-20 07:27:16,293 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:27:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1544354016, now seen corresponding path program 1 times [2021-11-20 07:27:16,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:16,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553299972] [2021-11-20 07:27:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:16,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:16,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:16,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553299972] [2021-11-20 07:27:16,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553299972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:16,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304417099] [2021-11-20 07:27:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:16,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:16,438 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:16,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:27:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:27:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:16,549 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:27:16,550 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 16 treesize of output 18 [2021-11-20 07:27:16,677 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:27:16,677 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 21 treesize of output 26 [2021-11-20 07:27:16,776 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:27:16,776 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 21 treesize of output 26 [2021-11-20 07:27:16,909 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:27:16,910 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 21 treesize of output 26 [2021-11-20 07:27:16,936 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 7 treesize of output 3 [2021-11-20 07:27:16,981 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 07:27:16,982 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 16 treesize of output 18 [2021-11-20 07:27:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:17,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:27:17,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304417099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:27:17,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:27:17,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-11-20 07:27:17,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145881804] [2021-11-20 07:27:17,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:27:17,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:27:17,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:27:17,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:27:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:27:17,443 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 07:27:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:27:17,523 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-11-20 07:27:17,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:27:17,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2021-11-20 07:27:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:27:17,524 INFO L225 Difference]: With dead ends: 100 [2021-11-20 07:27:17,524 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 07:27:17,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:27:17,525 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 129 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:27:17,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 355 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-11-20 07:27:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 07:27:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-20 07:27:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 93 states have internal predecessors, (100), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:27:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-11-20 07:27:17,530 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 53 [2021-11-20 07:27:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:27:17,531 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-11-20 07:27:17,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 14 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 07:27:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-11-20 07:27:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 07:27:17,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:27:17,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-11-20 07:27:17,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-20 07:27:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:17,743 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 48 more)] === [2021-11-20 07:27:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:27:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1326985614, now seen corresponding path program 1 times [2021-11-20 07:27:17,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:27:17,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982138769] [2021-11-20 07:27:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:17,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:27:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:27:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-20 07:27:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-20 07:27:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 07:27:18,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:27:18,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982138769] [2021-11-20 07:27:18,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982138769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:27:18,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083308316] [2021-11-20 07:27:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:27:18,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:27:18,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:27:18,603 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:27:18,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58f6cb0c-769e-4bc1-8314-1571228f71b8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:27:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:27:18,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-20 07:27:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:27:19,178 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 22 treesize of output 14 [2021-11-20 07:27:19,181 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 11 treesize of output 9 [2021-11-20 07:27:19,313 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 42 treesize of output 22 [2021-11-20 07:27:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:27:26,175 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 07:27:26,175 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-20 07:27:26,186 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:27:26,186 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 31 treesize of output 31 [2021-11-20 07:27:26,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:27:26,718 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-20 07:27:26,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 56 [2021-11-20 07:27:26,734 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 07:27:26,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 57 [2021-11-20 07:27:26,877 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 07:27:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 95 [2021-11-20 07:27:26,899 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-20 07:27:26,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 113 [2021-11-20 07:27:26,994 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 78 treesize of output 62 [2021-11-20 07:27:27,185 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:27:27,185 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 26 [2021-11-20 07:27:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:27:27,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:27:27,235 INFO L354 Elim1Store]: treesize reduction 5, result has 88.6 percent of original size [2021-11-20 07:27:27,236 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 48 treesize of output 47 [2021-11-20 07:27:35,976 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_insert_~last~1#1.offset| Int) (|ULTIMATE.start_sll_circular_insert_~last~1#1.base| Int) (|ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| Int)) (= |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.base|) |c_ULTIMATE.start_sll_circular_insert_~snd_to_last~0#1.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |ULTIMATE.start_sll_circular_insert_~last~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-11-20 07:27:38,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_insert_~last~1#1.base_25| Int) (|v_ULTIMATE.start_sll_circular_insert_~last~1#1.offset_23| Int) (|ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| Int)) (= |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_insert_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_circular_insert_~last~1#1.base_25|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_insert_~last~1#1.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_circular_insert_~last~1#1.offset_23|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-11-20 07:27:40,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_insert_~last~1#1.base_25| Int) (|v_ULTIMATE.start_sll_circular_insert_~last~1#1.offset_23| Int) (|ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| Int)) (= |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base|) |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.offset| |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse1 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_circular_insert_~last~1#1.base_25|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.base|) |c_ULTIMATE.start_sll_circular_insert_#t~mem10#1.offset| |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset|)))) (store .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_circular_insert_~new_node~0#1.base|) |ULTIMATE.start_sll_circular_insert_~new_node~0#1.offset| |v_ULTIMATE.start_sll_circular_insert_~last~1#1.offset_23|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-11-20 07:28:28,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:28:28,479 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 11219 treesize of output 10894