./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G --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 fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:32:13,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:32:13,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:32:13,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:32:13,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:32:13,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:32:13,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:32:13,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:32:13,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:32:13,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:32:13,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:32:13,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:32:13,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:32:13,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:32:13,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:32:13,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:32:13,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:32:13,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:32:13,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:32:13,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:32:13,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:32:13,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:32:13,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:32:13,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:32:13,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:32:13,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:32:13,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:32:13,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:32:13,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:32:13,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:32:13,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:32:13,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:32:13,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:32:13,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:32:13,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:32:13,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:32:13,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:32:13,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:32:13,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:32:13,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:32:13,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:32:13,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 12:32:13,301 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:32:13,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:32:13,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:32:13,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:32:13,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:32:13,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:32:13,305 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:32:13,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:32:13,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:32:13,313 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:32:13,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:32:13,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:32:13,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:32:13,314 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 12:32:13,314 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 12:32:13,315 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 12:32:13,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:32:13,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 12:32:13,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:32:13,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:32:13,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:32:13,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:32:13,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:32:13,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:32:13,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:32:13,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:32:13,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:32:13,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:32:13,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:32:13,320 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_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2021-11-23 12:32:13,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:32:13,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:32:13,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:32:13,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:32:13,728 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:32:13,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2021-11-23 12:32:13,814 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/data/d36072bce/02ac2cde62d646d48c2d48d098d6e56e/FLAG77e429450 [2021-11-23 12:32:14,503 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:32:14,508 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2021-11-23 12:32:14,538 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/data/d36072bce/02ac2cde62d646d48c2d48d098d6e56e/FLAG77e429450 [2021-11-23 12:32:14,734 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/data/d36072bce/02ac2cde62d646d48c2d48d098d6e56e [2021-11-23 12:32:14,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:32:14,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:32:14,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:32:14,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:32:14,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:32:14,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:32:14" (1/1) ... [2021-11-23 12:32:14,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b95a1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:14, skipping insertion in model container [2021-11-23 12:32:14,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:32:14" (1/1) ... [2021-11-23 12:32:14,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:32:14,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:32:15,195 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:32:15,212 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:32:15,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:32:15,324 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:32:15,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15 WrapperNode [2021-11-23 12:32:15,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:32:15,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:32:15,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:32:15,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:32:15,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,386 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-23 12:32:15,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:32:15,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:32:15,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:32:15,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:32:15,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:32:15,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:32:15,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:32:15,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:32:15,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (1/1) ... [2021-11-23 12:32:15,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:32:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:15,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:32:15,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:32:15,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:32:15,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:32:15,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:32:15,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:32:15,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:32:15,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:32:15,640 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:32:15,642 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:32:15,886 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:32:15,894 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:32:15,895 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:32:15,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:32:15 BoogieIcfgContainer [2021-11-23 12:32:15,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:32:15,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:32:15,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:32:15,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:32:15,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:32:14" (1/3) ... [2021-11-23 12:32:15,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7add4ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:32:15, skipping insertion in model container [2021-11-23 12:32:15,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:32:15" (2/3) ... [2021-11-23 12:32:15,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7add4ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:32:15, skipping insertion in model container [2021-11-23 12:32:15,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:32:15" (3/3) ... [2021-11-23 12:32:15,908 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2021-11-23 12:32:15,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:32:15,916 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-23 12:32:15,982 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:32:15,990 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 [2021-11-23 12:32:15,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-23 12:32:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:32:16,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:16,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:32:16,018 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-11-23 12:32:16,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:16,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810098894] [2021-11-23 12:32:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:16,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:16,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810098894] [2021-11-23 12:32:16,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810098894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:16,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:16,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:32:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534611710] [2021-11-23 12:32:16,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:32:16,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:32:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:16,456 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:16,550 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-23 12:32:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:32:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:32:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:16,562 INFO L225 Difference]: With dead ends: 34 [2021-11-23 12:32:16,563 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:32:16,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:32:16,572 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:16,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:16,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:32:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-23 12:32:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 12:32:16,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-11-23 12:32:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:16,620 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 12:32:16,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 12:32:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 12:32:16,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:16,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 12:32:16,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:32:16,624 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:16,629 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-11-23 12:32:16,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:16,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510087751] [2021-11-23 12:32:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:16,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:16,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510087751] [2021-11-23 12:32:16,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510087751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:16,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:32:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548891851] [2021-11-23 12:32:16,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:16,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:32:16,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:32:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:32:16,679 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:16,707 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-11-23 12:32:16,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:32:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 12:32:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:16,710 INFO L225 Difference]: With dead ends: 29 [2021-11-23 12:32:16,710 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:32:16,710 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 [2021-11-23 12:32:16,713 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:16,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:32:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-23 12:32:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-11-23 12:32:16,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-11-23 12:32:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:16,721 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-11-23 12:32:16,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-11-23 12:32:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:32:16,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:16,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:16,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:32:16,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-11-23 12:32:16,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:16,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077403126] [2021-11-23 12:32:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:16,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:16,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077403126] [2021-11-23 12:32:16,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077403126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:16,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:16,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:32:16,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854810817] [2021-11-23 12:32:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:16,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:32:16,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:32:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:32:16,832 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:16,875 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-23 12:32:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:32:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:32:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:16,877 INFO L225 Difference]: With dead ends: 25 [2021-11-23 12:32:16,877 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 12:32:16,878 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 [2021-11-23 12:32:16,880 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:16,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 12:32:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 12:32:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 12:32:16,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2021-11-23 12:32:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:16,887 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 12:32:16,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 12:32:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:32:16,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:16,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:16,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:32:16,889 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033016, now seen corresponding path program 1 times [2021-11-23 12:32:16,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:16,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198873463] [2021-11-23 12:32:16,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:16,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:17,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:17,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198873463] [2021-11-23 12:32:17,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198873463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:17,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:17,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:32:17,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420901022] [2021-11-23 12:32:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:17,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:32:17,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:32:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:17,043 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:17,099 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-11-23 12:32:17,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:32:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:32:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:17,102 INFO L225 Difference]: With dead ends: 24 [2021-11-23 12:32:17,102 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 12:32:17,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:17,115 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:17,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 12:32:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-23 12:32:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-23 12:32:17,126 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2021-11-23 12:32:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:17,127 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-23 12:32:17,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-23 12:32:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:32:17,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:17,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:17,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:32:17,130 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:17,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:17,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-11-23 12:32:17,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:17,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287700495] [2021-11-23 12:32:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:17,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:17,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287700495] [2021-11-23 12:32:17,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287700495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:17,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:17,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:32:17,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052751288] [2021-11-23 12:32:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:17,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:32:17,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:32:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:17,230 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:17,272 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-11-23 12:32:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:32:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:32:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:17,274 INFO L225 Difference]: With dead ends: 40 [2021-11-23 12:32:17,275 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:32:17,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:17,278 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:17,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:32:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-11-23 12:32:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-23 12:32:17,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-11-23 12:32:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:17,292 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-23 12:32:17,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-23 12:32:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 12:32:17,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:17,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:17,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:32:17,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2021-11-23 12:32:17,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:17,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953094176] [2021-11-23 12:32:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:17,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:17,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:17,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953094176] [2021-11-23 12:32:17,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953094176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:17,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:17,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:32:17,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976412928] [2021-11-23 12:32:17,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:17,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:32:17,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:32:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:32:17,444 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:17,506 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-23 12:32:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:32:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 12:32:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:17,508 INFO L225 Difference]: With dead ends: 44 [2021-11-23 12:32:17,508 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 12:32:17,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:32:17,509 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:17,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 45 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 12:32:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-11-23 12:32:17,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 12:32:17,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2021-11-23 12:32:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:17,516 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 12:32:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 12:32:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:32:17,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:17,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:17,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:32:17,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash 748014037, now seen corresponding path program 1 times [2021-11-23 12:32:17,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:17,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481623735] [2021-11-23 12:32:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:17,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:17,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:17,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481623735] [2021-11-23 12:32:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481623735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:17,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:17,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 12:32:17,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076668209] [2021-11-23 12:32:17,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:32:17,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:32:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:32:17,664 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:17,798 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-23 12:32:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:32:17,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:32:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:17,801 INFO L225 Difference]: With dead ends: 35 [2021-11-23 12:32:17,802 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 12:32:17,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:32:17,803 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:17,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 51 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 12:32:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-23 12:32:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-23 12:32:17,809 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2021-11-23 12:32:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:17,810 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-23 12:32:17,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-23 12:32:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 12:32:17,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:17,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:17,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:32:17,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash 748014036, now seen corresponding path program 1 times [2021-11-23 12:32:17,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044418349] [2021-11-23 12:32:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:17,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:17,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044418349] [2021-11-23 12:32:17,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044418349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:17,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:17,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:32:17,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605969182] [2021-11-23 12:32:17,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:17,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:32:17,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:32:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:32:17,871 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:17,921 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-23 12:32:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:32:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 12:32:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:17,923 INFO L225 Difference]: With dead ends: 29 [2021-11-23 12:32:17,923 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 12:32:17,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:32:17,925 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:17,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:17,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 12:32:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-23 12:32:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-23 12:32:17,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2021-11-23 12:32:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:17,931 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-23 12:32:17,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-23 12:32:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:32:17,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:17,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:32:17,933 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:17,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1713598655, now seen corresponding path program 1 times [2021-11-23 12:32:17,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:17,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902099668] [2021-11-23 12:32:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:17,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:18,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:18,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902099668] [2021-11-23 12:32:18,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902099668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:18,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:32:18,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928267784] [2021-11-23 12:32:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:32:18,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:32:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:32:18,030 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:18,093 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-23 12:32:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:32:18,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:32:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:18,094 INFO L225 Difference]: With dead ends: 28 [2021-11-23 12:32:18,094 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 12:32:18,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:18,096 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:18,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 40 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 12:32:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 12:32:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 12:32:18,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 11 [2021-11-23 12:32:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:18,101 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 12:32:18,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 12:32:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:32:18,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:18,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:18,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:32:18,103 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:18,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1713598656, now seen corresponding path program 1 times [2021-11-23 12:32:18,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250752113] [2021-11-23 12:32:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:18,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:18,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:18,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250752113] [2021-11-23 12:32:18,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250752113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:18,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:18,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:32:18,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240756414] [2021-11-23 12:32:18,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:18,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:32:18,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:32:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:32:18,213 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:18,312 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-11-23 12:32:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:32:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:32:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:18,313 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:32:18,313 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:32:18,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:32:18,315 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:18,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:32:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-23 12:32:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-23 12:32:18,319 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 11 [2021-11-23 12:32:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:18,320 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-23 12:32:18,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-23 12:32:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:32:18,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:18,321 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:18,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:32:18,322 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash 952918382, now seen corresponding path program 1 times [2021-11-23 12:32:18,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:18,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135905928] [2021-11-23 12:32:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:18,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:32:18,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135905928] [2021-11-23 12:32:18,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135905928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:18,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:18,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 12:32:18,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831097812] [2021-11-23 12:32:18,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:32:18,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:18,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:32:18,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:18,369 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:18,404 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-23 12:32:18,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:32:18,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:32:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:18,405 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:32:18,405 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 12:32:18,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:32:18,407 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:18,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:18,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 12:32:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-11-23 12:32:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-23 12:32:18,412 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2021-11-23 12:32:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:18,412 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-23 12:32:18,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-23 12:32:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 12:32:18,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:18,414 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:18,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:32:18,414 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-11-23 12:32:18,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:18,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943108599] [2021-11-23 12:32:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:18,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:18,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943108599] [2021-11-23 12:32:18,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943108599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610894416] [2021-11-23 12:32:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:18,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:18,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:18,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:18,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:32:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 12:32:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:18,726 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:32:18,727 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:32:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:18,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:19,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610894416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:19,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:19,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 12:32:19,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122169710] [2021-11-23 12:32:19,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:19,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 12:32:19,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:19,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 12:32:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:32:19,138 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:19,309 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-11-23 12:32:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:32:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 12:32:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:19,310 INFO L225 Difference]: With dead ends: 62 [2021-11-23 12:32:19,311 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 12:32:19,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:32:19,312 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:19,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 86 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 12:32:19,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 27. [2021-11-23 12:32:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 12:32:19,317 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 11 [2021-11-23 12:32:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:19,317 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 12:32:19,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 12:32:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:32:19,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:19,318 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:19,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:19,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:19,536 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -163723683, now seen corresponding path program 1 times [2021-11-23 12:32:19,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:19,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705986890] [2021-11-23 12:32:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:19,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:19,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705986890] [2021-11-23 12:32:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705986890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:19,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:19,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:19,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410377089] [2021-11-23 12:32:19,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:19,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:19,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:19,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:19,649 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:19,771 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-11-23 12:32:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:32:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:19,773 INFO L225 Difference]: With dead ends: 39 [2021-11-23 12:32:19,773 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 12:32:19,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:32:19,774 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:19,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 12:32:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-11-23 12:32:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 12:32:19,779 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2021-11-23 12:32:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:19,779 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 12:32:19,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 12:32:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:32:19,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:19,781 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:19,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:32:19,781 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:19,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:19,782 INFO L85 PathProgramCache]: Analyzing trace with hash 537340895, now seen corresponding path program 1 times [2021-11-23 12:32:19,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:19,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529451484] [2021-11-23 12:32:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:19,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:19,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:19,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529451484] [2021-11-23 12:32:19,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529451484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:19,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:19,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:19,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87431303] [2021-11-23 12:32:19,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:19,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:19,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:19,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:19,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:19,940 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:20,083 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-11-23 12:32:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:32:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:20,085 INFO L225 Difference]: With dead ends: 53 [2021-11-23 12:32:20,085 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 12:32:20,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:32:20,087 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:20,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 110 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 12:32:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2021-11-23 12:32:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-23 12:32:20,092 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2021-11-23 12:32:20,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:20,092 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-23 12:32:20,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-23 12:32:20,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 12:32:20,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:20,094 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:20,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:32:20,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash 795506333, now seen corresponding path program 1 times [2021-11-23 12:32:20,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:20,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191453740] [2021-11-23 12:32:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:20,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:20,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:20,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191453740] [2021-11-23 12:32:20,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191453740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:20,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:20,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:20,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891154990] [2021-11-23 12:32:20,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:20,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:20,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:20,241 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:20,393 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-11-23 12:32:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 12:32:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:20,397 INFO L225 Difference]: With dead ends: 47 [2021-11-23 12:32:20,397 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 12:32:20,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:32:20,400 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:20,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 97 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 12:32:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2021-11-23 12:32:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-23 12:32:20,408 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2021-11-23 12:32:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:20,409 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-23 12:32:20,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-23 12:32:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 12:32:20,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:20,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:20,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:32:20,414 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:20,415 INFO L85 PathProgramCache]: Analyzing trace with hash -780511546, now seen corresponding path program 1 times [2021-11-23 12:32:20,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:20,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222981733] [2021-11-23 12:32:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:20,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:20,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222981733] [2021-11-23 12:32:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222981733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:20,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:32:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374617012] [2021-11-23 12:32:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:20,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:32:20,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:32:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:20,531 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:20,549 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-11-23 12:32:20,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:32:20,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 12:32:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:20,551 INFO L225 Difference]: With dead ends: 33 [2021-11-23 12:32:20,552 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 12:32:20,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:32:20,553 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:20,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 12:32:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 12:32:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-23 12:32:20,558 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2021-11-23 12:32:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:20,559 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-23 12:32:20,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-23 12:32:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 12:32:20,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:20,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:20,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:32:20,561 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:20,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2086958086, now seen corresponding path program 1 times [2021-11-23 12:32:20,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:20,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097438699] [2021-11-23 12:32:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:20,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:20,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097438699] [2021-11-23 12:32:20,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097438699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:20,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178462017] [2021-11-23 12:32:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:20,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:20,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:20,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:20,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:32:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 12:32:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:21,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:21,212 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 5 treesize of output 3 [2021-11-23 12:32:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:21,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178462017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:21,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:21,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-11-23 12:32:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532585184] [2021-11-23 12:32:21,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:21,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 12:32:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 12:32:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-11-23 12:32:21,264 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:21,533 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-23 12:32:21,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 12:32:21,534 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 12:32:21,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:21,535 INFO L225 Difference]: With dead ends: 30 [2021-11-23 12:32:21,535 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:32:21,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:32:21,536 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:21,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 54 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:32:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-11-23 12:32:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-23 12:32:21,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-11-23 12:32:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:21,542 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-23 12:32:21,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-23 12:32:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:32:21,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:21,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:21,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:21,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 12:32:21,754 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:21,755 INFO L85 PathProgramCache]: Analyzing trace with hash -271191237, now seen corresponding path program 1 times [2021-11-23 12:32:21,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:21,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778395586] [2021-11-23 12:32:21,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:21,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:21,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778395586] [2021-11-23 12:32:21,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778395586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:21,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59956358] [2021-11-23 12:32:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:21,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:21,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:21,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:21,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:32:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 12:32:22,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:22,052 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:32:22,053 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 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:32:22,069 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 20 treesize of output 18 [2021-11-23 12:32:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:22,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:22,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59956358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:22,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:22,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2021-11-23 12:32:22,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258548370] [2021-11-23 12:32:22,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:23,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 12:32:23,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 12:32:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-23 12:32:23,003 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:23,232 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-23 12:32:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:32:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 12:32:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:23,233 INFO L225 Difference]: With dead ends: 35 [2021-11-23 12:32:23,234 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 12:32:23,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-11-23 12:32:23,235 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:23,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-23 12:32:23,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 12:32:23,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-11-23 12:32:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-23 12:32:23,239 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2021-11-23 12:32:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:23,239 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-23 12:32:23,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-23 12:32:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 12:32:23,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:23,240 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:23,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:23,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 12:32:23,441 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash -224662014, now seen corresponding path program 2 times [2021-11-23 12:32:23,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:23,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714803324] [2021-11-23 12:32:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:23,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:23,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714803324] [2021-11-23 12:32:23,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714803324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664480630] [2021-11-23 12:32:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:32:23,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:23,838 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:23,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:32:23,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:32:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 12:32:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:23,939 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 10 treesize of output 8 [2021-11-23 12:32:24,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 12:32:24,478 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-23 12:32:24,478 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 41 treesize of output 40 [2021-11-23 12:32:24,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:32:24,757 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 35 treesize of output 35 [2021-11-23 12:32:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:24,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:26,624 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 194 treesize of output 182 [2021-11-23 12:32:26,636 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 156 treesize of output 152 [2021-11-23 12:32:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:27,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664480630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:27,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:27,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-23 12:32:27,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731548556] [2021-11-23 12:32:27,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:27,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 12:32:27,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 12:32:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 12:32:27,021 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:27,919 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-23 12:32:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:32:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 12:32:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:27,921 INFO L225 Difference]: With dead ends: 48 [2021-11-23 12:32:27,921 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 12:32:27,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=237, Invalid=2019, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 12:32:27,923 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:27,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 109 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 137 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2021-11-23 12:32:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 12:32:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-11-23 12:32:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-23 12:32:27,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2021-11-23 12:32:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-23 12:32:27,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-23 12:32:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:32:27,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:27,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:27,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:28,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:28,141 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -121211530, now seen corresponding path program 2 times [2021-11-23 12:32:28,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:28,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021177433] [2021-11-23 12:32:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:28,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:28,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:28,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021177433] [2021-11-23 12:32:28,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021177433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:28,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460119499] [2021-11-23 12:32:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:32:28,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:28,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:28,362 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:28,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:32:28,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:32:28,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:28,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 12:32:28,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:28,482 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:32:28,482 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 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:32:28,487 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 20 treesize of output 18 [2021-11-23 12:32:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:29,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:29,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460119499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:29,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:29,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-11-23 12:32:29,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136152747] [2021-11-23 12:32:29,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 12:32:29,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 12:32:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-11-23 12:32:29,756 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:30,140 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-11-23 12:32:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:32:30,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 12:32:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:30,142 INFO L225 Difference]: With dead ends: 33 [2021-11-23 12:32:30,142 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 12:32:30,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 12:32:30,144 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:30,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-11-23 12:32:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 12:32:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 12:32:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-23 12:32:30,147 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2021-11-23 12:32:30,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:30,147 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-23 12:32:30,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-23 12:32:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 12:32:30,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:30,149 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:30,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:30,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:30,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1054801383, now seen corresponding path program 3 times [2021-11-23 12:32:30,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:30,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825481924] [2021-11-23 12:32:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:30,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:30,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825481924] [2021-11-23 12:32:30,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825481924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073956585] [2021-11-23 12:32:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:32:30,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:30,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:30,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:30,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:32:30,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:32:30,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-23 12:32:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:30,924 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 10 treesize of output 8 [2021-11-23 12:32:31,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:32:31,575 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 29 treesize of output 28 [2021-11-23 12:32:31,791 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 27 treesize of output 26 [2021-11-23 12:32:31,950 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-23 12:32:31,950 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 23 treesize of output 16 [2021-11-23 12:32:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:31,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:32,331 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 402 treesize of output 390 [2021-11-23 12:32:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:33,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073956585] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:33,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:33,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2021-11-23 12:32:33,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826839788] [2021-11-23 12:32:33,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:33,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 12:32:33,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:33,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 12:32:33,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:32:33,105 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:33,455 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-11-23 12:32:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 12:32:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 12:32:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:33,456 INFO L225 Difference]: With dead ends: 54 [2021-11-23 12:32:33,457 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 12:32:33,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:32:33,459 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:33,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 190 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2021-11-23 12:32:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 12:32:33,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-11-23 12:32:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-23 12:32:33,462 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 30 [2021-11-23 12:32:33,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:33,463 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-23 12:32:33,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:33,463 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-23 12:32:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 12:32:33,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:33,464 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:33,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:33,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:33,682 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1308342596, now seen corresponding path program 4 times [2021-11-23 12:32:33,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843737065] [2021-11-23 12:32:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:33,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:33,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:33,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843737065] [2021-11-23 12:32:33,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843737065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:33,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742594198] [2021-11-23 12:32:33,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:32:33,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:33,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:33,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:33,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:32:34,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:32:34,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:34,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-23 12:32:34,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:34,070 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:32:34,070 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:32:34,085 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 10 treesize of output 8 [2021-11-23 12:32:34,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 12:32:34,624 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 23 treesize of output 22 [2021-11-23 12:32:34,793 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-23 12:32:34,793 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 26 [2021-11-23 12:32:34,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 12:32:34,948 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 21 treesize of output 21 [2021-11-23 12:32:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:35,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:37,898 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 385 treesize of output 373 [2021-11-23 12:32:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742594198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:39,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:39,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 42 [2021-11-23 12:32:39,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917792860] [2021-11-23 12:32:39,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:39,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 12:32:39,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:39,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 12:32:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1608, Unknown=1, NotChecked=0, Total=1806 [2021-11-23 12:32:39,182 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:42,713 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-11-23 12:32:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:32:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 12:32:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:42,718 INFO L225 Difference]: With dead ends: 45 [2021-11-23 12:32:42,718 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 12:32:42,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=459, Invalid=2961, Unknown=2, NotChecked=0, Total=3422 [2021-11-23 12:32:42,723 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:42,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 139 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2021-11-23 12:32:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 12:32:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-11-23 12:32:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-11-23 12:32:42,733 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 34 [2021-11-23 12:32:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:42,735 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-11-23 12:32:42,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.238095238095238) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-11-23 12:32:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 12:32:42,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:42,741 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:42,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:42,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:42,959 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:42,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1903914801, now seen corresponding path program 3 times [2021-11-23 12:32:42,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259119777] [2021-11-23 12:32:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:42,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:43,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:43,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259119777] [2021-11-23 12:32:43,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259119777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377551717] [2021-11-23 12:32:43,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:32:43,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:43,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:43,278 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:43,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:32:43,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 12:32:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 12:32:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:43,434 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:32:43,435 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 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:32:43,440 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 20 treesize of output 18 [2021-11-23 12:32:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:44,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:45,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377551717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:45,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:45,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2021-11-23 12:32:45,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264624740] [2021-11-23 12:32:45,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:45,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 12:32:45,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 12:32:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 12:32:45,042 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 33 states, 32 states have (on average 3.03125) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:45,716 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-23 12:32:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 12:32:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.03125) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-23 12:32:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:45,717 INFO L225 Difference]: With dead ends: 44 [2021-11-23 12:32:45,717 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 12:32:45,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 12:32:45,720 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:45,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2021-11-23 12:32:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 12:32:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 12:32:45,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-23 12:32:45,724 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2021-11-23 12:32:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:45,724 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-23 12:32:45,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.03125) internal successors, (97), 33 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-23 12:32:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 12:32:45,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:45,726 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:45,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 12:32:45,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:45,952 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1524392745, now seen corresponding path program 4 times [2021-11-23 12:32:45,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:45,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915634634] [2021-11-23 12:32:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:45,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:46,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:46,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915634634] [2021-11-23 12:32:46,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915634634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:46,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826071856] [2021-11-23 12:32:46,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:32:46,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:46,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:46,206 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:46,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:32:46,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:32:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 12:32:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:46,326 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 12:32:46,327 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 12:32:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:46,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:47,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826071856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:47,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:47,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2021-11-23 12:32:47,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116090019] [2021-11-23 12:32:47,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:47,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 12:32:47,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:47,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 12:32:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-11-23 12:32:47,078 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:47,529 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-11-23 12:32:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 12:32:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 12:32:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:47,530 INFO L225 Difference]: With dead ends: 71 [2021-11-23 12:32:47,530 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 12:32:47,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 12:32:47,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:47,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 88 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:32:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 12:32:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2021-11-23 12:32:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-23 12:32:47,536 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 39 [2021-11-23 12:32:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:47,537 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-23 12:32:47,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 32 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-23 12:32:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 12:32:47,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:47,539 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:47,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:47,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:47,754 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:47,754 INFO L85 PathProgramCache]: Analyzing trace with hash -275767188, now seen corresponding path program 5 times [2021-11-23 12:32:47,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:47,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892560684] [2021-11-23 12:32:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:47,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:48,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892560684] [2021-11-23 12:32:48,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892560684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20996513] [2021-11-23 12:32:48,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:32:48,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:48,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:48,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:48,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:32:48,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-23 12:32:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:48,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 12:32:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:48,218 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:32:48,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:32:48,233 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 20 treesize of output 18 [2021-11-23 12:32:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:49,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20996513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:32:49,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:32:49,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2021-11-23 12:32:49,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237778954] [2021-11-23 12:32:49,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:32:49,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 12:32:49,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 12:32:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 12:32:49,965 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:50,295 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-23 12:32:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 12:32:50,296 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 12:32:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:50,297 INFO L225 Difference]: With dead ends: 49 [2021-11-23 12:32:50,297 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 12:32:50,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 12:32:50,299 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:50,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 151 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2021-11-23 12:32:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 12:32:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-23 12:32:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-23 12:32:50,302 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2021-11-23 12:32:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:50,302 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-23 12:32:50,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-23 12:32:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 12:32:50,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:50,304 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:32:50,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:32:50,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 12:32:50,504 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:32:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash 892135217, now seen corresponding path program 5 times [2021-11-23 12:32:50,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:50,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940507163] [2021-11-23 12:32:50,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:50,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:51,163 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:51,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940507163] [2021-11-23 12:32:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940507163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:32:51,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454222622] [2021-11-23 12:32:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:32:51,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:32:51,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:32:51,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:32:51,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:32:51,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-23 12:32:51,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:32:51,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-23 12:32:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:32:51,407 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 10 treesize of output 8 [2021-11-23 12:32:51,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:32:51,947 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 28 treesize of output 27 [2021-11-23 12:32:52,044 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 21 treesize of output 20 [2021-11-23 12:32:52,130 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 21 treesize of output 20 [2021-11-23 12:32:52,209 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 12:32:52,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 22 [2021-11-23 12:32:52,225 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 [2021-11-23 12:32:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:52,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:32:52,948 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) |c_ULTIMATE.start_cstrcpy_~src~0#1.offset|) 0)) is different from false [2021-11-23 12:32:53,739 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-23 12:32:54,763 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~mem4#1_79| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_78| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)))) (store .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (select .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_78| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_79|))) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-23 12:32:55,633 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~mem4#1_79| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_78| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_78| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_79|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-23 12:33:51,049 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 25482 treesize of output 25290 [2021-11-23 12:33:53,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 12:33:53,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:33:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-23 12:33:53,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242847428] [2021-11-23 12:33:53,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:53,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 12:33:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 12:33:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1646, Unknown=45, NotChecked=340, Total=2162 [2021-11-23 12:33:53,227 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:54,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:54,196 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-11-23 12:33:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 12:33:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-23 12:33:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:54,197 INFO L225 Difference]: With dead ends: 78 [2021-11-23 12:33:54,197 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 12:33:54,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=286, Invalid=2991, Unknown=45, NotChecked=460, Total=3782 [2021-11-23 12:33:54,200 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:54,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 237 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:33:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 12:33:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-11-23 12:33:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-23 12:33:54,204 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 46 [2021-11-23 12:33:54,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:54,204 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-23 12:33:54,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:54,205 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-23 12:33:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 12:33:54,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:54,206 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:54,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:54,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 12:33:54,414 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:33:54,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -282507122, now seen corresponding path program 6 times [2021-11-23 12:33:54,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319391546] [2021-11-23 12:33:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:54,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:54,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:54,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319391546] [2021-11-23 12:33:54,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319391546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:54,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146724468] [2021-11-23 12:33:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:33:54,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:54,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:54,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:54,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 12:33:54,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-23 12:33:54,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:54,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-23 12:33:54,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:55,764 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 [2021-11-23 12:33:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:55,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146724468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:55,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:55,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2021-11-23 12:33:55,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403570345] [2021-11-23 12:33:55,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:55,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 12:33:55,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:55,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 12:33:55,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 12:33:55,845 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 40 states have (on average 3.0) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:33:56,603 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-11-23 12:33:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 12:33:56,603 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.0) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-23 12:33:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:33:56,604 INFO L225 Difference]: With dead ends: 59 [2021-11-23 12:33:56,604 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 12:33:56,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 12:33:56,607 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 159 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:33:56,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 191 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:33:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 12:33:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-23 12:33:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-23 12:33:56,611 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2021-11-23 12:33:56,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:33:56,611 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-23 12:33:56,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.0) internal successors, (120), 41 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:33:56,612 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-23 12:33:56,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:33:56,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:33:56,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:33:56,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 12:33:56,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 12:33:56,830 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:33:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:33:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash -167786201, now seen corresponding path program 6 times [2021-11-23 12:33:56,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:33:56,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812631753] [2021-11-23 12:33:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:33:56,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:33:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:33:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:57,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:33:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812631753] [2021-11-23 12:33:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812631753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:33:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122956318] [2021-11-23 12:33:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:33:57,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:33:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:33:57,155 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:33:57,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 12:33:57,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-23 12:33:57,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:33:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 12:33:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:33:57,326 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:33:57,327 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 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:33:57,331 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 20 treesize of output 18 [2021-11-23 12:33:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:58,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:33:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:33:59,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122956318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:33:59,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:33:59,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2021-11-23 12:33:59,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416850728] [2021-11-23 12:33:59,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:33:59,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 12:33:59,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:33:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 12:33:59,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 12:33:59,480 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 45 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:34:00,417 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-11-23 12:34:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 12:34:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 12:34:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:34:00,419 INFO L225 Difference]: With dead ends: 57 [2021-11-23 12:34:00,419 INFO L226 Difference]: Without dead ends: 57 [2021-11-23 12:34:00,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=496, Invalid=3664, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 12:34:00,421 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:34:00,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 202 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2021-11-23 12:34:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-23 12:34:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-23 12:34:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-23 12:34:00,427 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2021-11-23 12:34:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:34:00,428 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-23 12:34:00,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.2954545454545454) internal successors, (145), 45 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:34:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-23 12:34:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 12:34:00,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:34:00,430 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:34:00,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 12:34:00,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 12:34:00,646 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:34:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:34:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 823214230, now seen corresponding path program 7 times [2021-11-23 12:34:00,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:34:00,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086406634] [2021-11-23 12:34:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:34:00,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:34:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:01,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:34:01,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086406634] [2021-11-23 12:34:01,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086406634] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:34:01,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093696132] [2021-11-23 12:34:01,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:34:01,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:34:01,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:34:01,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:34:01,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 12:34:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:34:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-23 12:34:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:34:01,625 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 10 treesize of output 8 [2021-11-23 12:34:02,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:34:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 12:34:02,372 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 21 treesize of output 20 [2021-11-23 12:34:02,466 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 21 treesize of output 20 [2021-11-23 12:34:02,555 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 21 treesize of output 20 [2021-11-23 12:34:02,632 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 12:34:02,633 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 23 treesize of output 22 [2021-11-23 12:34:02,660 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 [2021-11-23 12:34:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:34:02,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:34:36,653 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_117| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_117|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-23 12:34:37,644 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_120| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_120| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_117| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)))) (store .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (select .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_120| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_120|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_117|))) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-23 12:34:38,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_120| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_120| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_117| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_120| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_120|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_117|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 3)) 0)) is different from false [2021-11-23 12:35:06,748 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_123| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_126| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_120| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_120| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_123| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_117| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_126| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)))) (store .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (store (store (select .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_126| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_126|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_123| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_123|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_120| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_120|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_117| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_117|))) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-23 12:35:33,859 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 6380 treesize of output 6356 [2021-11-23 12:35:41,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 12:35:41,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:35:41,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-23 12:35:41,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097315213] [2021-11-23 12:35:41,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 12:35:41,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 12:35:41,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 12:35:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2331, Unknown=76, NotChecked=404, Total=2970 [2021-11-23 12:35:41,314 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:42,775 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-11-23 12:35:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:35:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 12:35:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:42,777 INFO L225 Difference]: With dead ends: 90 [2021-11-23 12:35:42,777 INFO L226 Difference]: Without dead ends: 64 [2021-11-23 12:35:42,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 93.0s TimeCoverageRelationStatistics Valid=335, Invalid=4161, Unknown=76, NotChecked=540, Total=5112 [2021-11-23 12:35:42,780 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:42,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 337 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 12:35:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-23 12:35:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-11-23 12:35:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-23 12:35:42,783 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 54 [2021-11-23 12:35:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-23 12:35:42,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-23 12:35:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 12:35:42,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:42,785 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:42,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:42,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 12:35:42,994 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:35:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:42,995 INFO L85 PathProgramCache]: Analyzing trace with hash -101124877, now seen corresponding path program 8 times [2021-11-23 12:35:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:42,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000084748] [2021-11-23 12:35:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:42,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:43,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000084748] [2021-11-23 12:35:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000084748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862714578] [2021-11-23 12:35:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:35:43,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:43,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:43,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 12:35:43,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:35:43,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:35:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 12:35:43,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:43,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:35:44,132 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 5 treesize of output 3 [2021-11-23 12:35:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:44,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862714578] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:35:44,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:35:44,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 38 [2021-11-23 12:35:44,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650437781] [2021-11-23 12:35:44,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:35:44,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 12:35:44,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 12:35:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 12:35:44,207 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 39 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 39 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:44,980 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-11-23 12:35:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 12:35:44,981 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 39 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 12:35:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:44,982 INFO L225 Difference]: With dead ends: 67 [2021-11-23 12:35:44,982 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 12:35:44,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=564, Invalid=2406, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 12:35:44,984 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 374 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:44,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 209 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 12:35:44,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 12:35:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-23 12:35:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:44,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-23 12:35:44,987 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2021-11-23 12:35:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:44,988 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-23 12:35:44,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 39 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-23 12:35:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 12:35:44,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:44,989 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:45,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:45,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:45,210 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:35:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1160096098, now seen corresponding path program 7 times [2021-11-23 12:35:45,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:45,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654709319] [2021-11-23 12:35:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:45,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 28 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:45,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:45,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654709319] [2021-11-23 12:35:45,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654709319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:45,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549613774] [2021-11-23 12:35:45,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:35:45,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:45,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:45,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 12:35:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:45,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 12:35:45,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:45,731 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 12:35:45,732 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 1 case distinctions, treesize of input 21 treesize of output 22 [2021-11-23 12:35:45,735 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 20 treesize of output 18 [2021-11-23 12:35:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 45 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:47,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:35:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:47,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549613774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:35:47,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:35:47,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2021-11-23 12:35:47,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673758145] [2021-11-23 12:35:47,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:35:47,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 12:35:47,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:35:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 12:35:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 12:35:47,955 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 51 states, 50 states have (on average 3.38) internal successors, (169), 51 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:35:48,779 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-11-23 12:35:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:35:48,779 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.38) internal successors, (169), 51 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 12:35:48,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:35:48,780 INFO L225 Difference]: With dead ends: 65 [2021-11-23 12:35:48,780 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 12:35:48,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=492, Invalid=3930, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 12:35:48,782 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:35:48,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 299 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 66 Unchecked, 0.0s Time] [2021-11-23 12:35:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 12:35:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-23 12:35:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-23 12:35:48,786 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2021-11-23 12:35:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:35:48,786 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-23 12:35:48,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.38) internal successors, (169), 51 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:35:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-23 12:35:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 12:35:48,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:35:48,787 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:35:48,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 12:35:48,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:48,990 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-23 12:35:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:35:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1178979717, now seen corresponding path program 9 times [2021-11-23 12:35:48,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:35:48,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869288587] [2021-11-23 12:35:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:35:48,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:35:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:35:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:49,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:35:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869288587] [2021-11-23 12:35:49,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869288587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:35:49,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218021026] [2021-11-23 12:35:49,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:35:49,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:35:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:35:49,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:35:49,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f8607bb-5422-4901-a69b-60ca65fe679b/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 12:35:50,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 12:35:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:35:50,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-23 12:35:50,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:35:50,298 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 10 treesize of output 8 [2021-11-23 12:35:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 12:35:50,953 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 28 treesize of output 27 [2021-11-23 12:35:51,072 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 21 treesize of output 20 [2021-11-23 12:35:51,153 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 21 treesize of output 20 [2021-11-23 12:35:51,229 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 21 treesize of output 20 [2021-11-23 12:35:51,307 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 21 treesize of output 20 [2021-11-23 12:35:51,386 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 19 treesize of output 18 [2021-11-23 12:35:51,441 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 [2021-11-23 12:35:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:35:51,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:36:09,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-23 12:36:10,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_162| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)))) (store .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (select .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_162|))) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 1)) 0)) is different from false [2021-11-23 12:36:21,252 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_165| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_162| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)))) (store .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (select .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_165|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_162|))) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 2)) 0)) is different from false [2021-11-23 12:36:50,101 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_#t~mem4#1_168| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_165| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_162| Int) (|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_169| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_169| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_168|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_165|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_162|)) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 4)) 0)) is different from false [2021-11-23 12:37:21,813 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_169| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_168| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_175| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_165| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_172| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_171| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_162| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_174| Int)) (= 0 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_cstrcpy_#t~post2#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|)))) (store .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base| (store (store (store (store (store (select .cse0 |c_ULTIMATE.start_cstrcpy_~dst~0#1.base|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_175| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_174|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_172| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_171|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_169| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_168|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_165|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_162|))) |c_ULTIMATE.start_cstrcpy_~src~0#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~src~0#1.offset| 5)))) is different from false [2021-11-23 12:37:40,345 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcpy_#t~mem4#1| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_169| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_168| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_175| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| Int) (|ULTIMATE.start_cstrcpy_#t~post2#1.offset| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_165| Int) (|v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_172| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_171| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_162| Int) (|v_ULTIMATE.start_cstrcpy_#t~mem4#1_174| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| (store (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base|) |ULTIMATE.start_cstrcpy_#t~post2#1.offset| |ULTIMATE.start_cstrcpy_#t~mem4#1|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_175| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_174|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_172| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_171|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_169| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_168|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_166| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_165|) |v_ULTIMATE.start_cstrcpy_#t~post2#1.offset_163| |v_ULTIMATE.start_cstrcpy_#t~mem4#1_162|)) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-11-23 12:37:40,361 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 204826 treesize of output 204442 [2021-11-23 12:37:50,069 WARN L227 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 766 DAG size of output: 766 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)