./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:27:08,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:27:08,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:27:08,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:27:08,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:27:08,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:27:08,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:27:08,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:27:08,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:27:08,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:27:08,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:27:08,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:27:08,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:27:08,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:27:08,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:27:08,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:27:08,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:27:08,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:27:08,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:27:08,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:27:08,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:27:08,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:27:08,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:27:08,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:27:08,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:27:08,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:27:08,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:27:08,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:27:08,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:27:08,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:27:08,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:27:08,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:27:08,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:27:08,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:27:08,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:27:08,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:27:08,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:27:08,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:27:08,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:27:08,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:27:08,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:27:08,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:27:08,172 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:27:08,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:27:08,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:27:08,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:27:08,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:27:08,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:27:08,175 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:27:08,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:27:08,176 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:27:08,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:27:08,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:27:08,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:27:08,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:27:08,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:27:08,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:27:08,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:27:08,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:27:08,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:27:08,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:27:08,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:27:08,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:27:08,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:27:08,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:27:08,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:27:08,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:27:08,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:27:08,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:27:08,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:27:08,181 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:27:08,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:27:08,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:27:08,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:27:08,182 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_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 [2021-11-22 14:27:08,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:27:08,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:27:08,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:27:08,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:27:08,510 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:27:08,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2021-11-22 14:27:08,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/data/ac3117205/62e73d500c514213b905dc751fc90ca8/FLAGcd8d4f4bb [2021-11-22 14:27:09,038 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:27:09,040 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2021-11-22 14:27:09,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/data/ac3117205/62e73d500c514213b905dc751fc90ca8/FLAGcd8d4f4bb [2021-11-22 14:27:09,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/data/ac3117205/62e73d500c514213b905dc751fc90ca8 [2021-11-22 14:27:09,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:27:09,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:27:09,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:27:09,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:27:09,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:27:09,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd3f601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09, skipping insertion in model container [2021-11-22 14:27:09,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:27:09,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:27:09,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2021-11-22 14:27:09,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:27:09,674 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:27:09,692 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/sv-benchmarks/c/recursive-simple/sum_15x0-1.c[481,494] [2021-11-22 14:27:09,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:27:09,707 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:27:09,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09 WrapperNode [2021-11-22 14:27:09,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:27:09,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:27:09,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:27:09,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:27:09,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,746 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-11-22 14:27:09,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:27:09,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:27:09,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:27:09,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:27:09,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:27:09,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:27:09,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:27:09,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:27:09,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (1/1) ... [2021-11-22 14:27:09,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:27:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:09,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:27:09,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:27:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:27:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:27:09,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:27:09,863 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2021-11-22 14:27:09,864 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2021-11-22 14:27:09,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:27:09,928 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:27:09,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:27:10,070 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:27:10,077 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:27:10,079 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-22 14:27:10,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:10 BoogieIcfgContainer [2021-11-22 14:27:10,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:27:10,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:27:10,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:27:10,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:27:10,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:27:09" (1/3) ... [2021-11-22 14:27:10,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e2f687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:10, skipping insertion in model container [2021-11-22 14:27:10,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:27:09" (2/3) ... [2021-11-22 14:27:10,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e2f687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:27:10, skipping insertion in model container [2021-11-22 14:27:10,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:10" (3/3) ... [2021-11-22 14:27:10,093 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2021-11-22 14:27:10,099 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:27:10,099 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:27:10,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:27:10,171 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 14:27:10,172 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:27:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-22 14:27:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 14:27:10,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:10,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:10,207 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-11-22 14:27:10,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:10,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918652658] [2021-11-22 14:27:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:10,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:27:10,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918652658] [2021-11-22 14:27:10,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918652658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:27:10,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:27:10,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:27:10,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967387062] [2021-11-22 14:27:10,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:27:10,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:27:10,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:10,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:27:10,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:27:10,456 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:27:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:10,534 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-22 14:27:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:27:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-22 14:27:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:10,545 INFO L225 Difference]: With dead ends: 25 [2021-11-22 14:27:10,549 INFO L226 Difference]: Without dead ends: 15 [2021-11-22 14:27:10,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:27:10,566 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:10,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:27:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-22 14:27:10,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-22 14:27:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-22 14:27:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-22 14:27:10,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-11-22 14:27:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:10,611 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-22 14:27:10,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-22 14:27:10,612 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-22 14:27:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 14:27:10,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:10,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:10,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:27:10,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-11-22 14:27:10,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:10,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522860800] [2021-11-22 14:27:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:10,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:10,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:10,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:27:10,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:10,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522860800] [2021-11-22 14:27:10,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522860800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388950566] [2021-11-22 14:27:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:10,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:10,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:10,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:10,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:27:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:10,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:27:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:27:10,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:27:11,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388950566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:11,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:11,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2021-11-22 14:27:11,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88008139] [2021-11-22 14:27:11,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:11,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:27:11,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:27:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:27:11,257 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-22 14:27:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:11,320 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-11-22 14:27:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:27:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2021-11-22 14:27:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:11,322 INFO L225 Difference]: With dead ends: 22 [2021-11-22 14:27:11,323 INFO L226 Difference]: Without dead ends: 18 [2021-11-22 14:27:11,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:27:11,325 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:11,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:27:11,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-22 14:27:11,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-22 14:27:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-22 14:27:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-22 14:27:11,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-11-22 14:27:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:11,333 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-22 14:27:11,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-22 14:27:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-22 14:27:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 14:27:11,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:11,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:11,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:11,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:11,564 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:11,564 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-11-22 14:27:11,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:11,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252833152] [2021-11-22 14:27:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:11,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:11,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:11,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:11,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 14:27:11,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252833152] [2021-11-22 14:27:11,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252833152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988189061] [2021-11-22 14:27:11,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:27:11,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:11,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:11,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:27:11,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:27:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:27:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 14:27:11,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 14:27:12,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988189061] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:12,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:12,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2021-11-22 14:27:12,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574940085] [2021-11-22 14:27:12,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:12,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:27:12,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:12,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:27:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:27:12,310 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-22 14:27:12,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:12,390 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-22 14:27:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:27:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2021-11-22 14:27:12,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:12,392 INFO L225 Difference]: With dead ends: 25 [2021-11-22 14:27:12,392 INFO L226 Difference]: Without dead ends: 21 [2021-11-22 14:27:12,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:27:12,396 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:12,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:27:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-22 14:27:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-22 14:27:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-22 14:27:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-22 14:27:12,404 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-11-22 14:27:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:12,404 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-22 14:27:12,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-22 14:27:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-22 14:27:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 14:27:12,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:12,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:12,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-22 14:27:12,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:12,627 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-11-22 14:27:12,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:12,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84750753] [2021-11-22 14:27:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:12,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:12,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:12,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:12,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:12,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:27:12,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84750753] [2021-11-22 14:27:12,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84750753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:12,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367391903] [2021-11-22 14:27:12,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:27:12,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:12,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:12,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:12,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:27:12,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 14:27:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:12,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:27:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:27:13,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 14:27:13,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367391903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:13,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:13,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2021-11-22 14:27:13,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19001762] [2021-11-22 14:27:13,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:13,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 14:27:13,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 14:27:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:27:13,501 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-22 14:27:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:13,573 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-22 14:27:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:27:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2021-11-22 14:27:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:13,576 INFO L225 Difference]: With dead ends: 28 [2021-11-22 14:27:13,576 INFO L226 Difference]: Without dead ends: 24 [2021-11-22 14:27:13,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:27:13,578 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:13,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 42 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:27:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-22 14:27:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-22 14:27:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-22 14:27:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-22 14:27:13,585 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-11-22 14:27:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:13,585 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-22 14:27:13,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-22 14:27:13,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-22 14:27:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 14:27:13,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:13,587 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:13,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:13,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:13,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:13,804 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-11-22 14:27:13,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:13,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030812137] [2021-11-22 14:27:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:13,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:13,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:13,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:13,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:13,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-22 14:27:14,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:14,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030812137] [2021-11-22 14:27:14,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030812137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:14,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124282004] [2021-11-22 14:27:14,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:27:14,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:14,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:14,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:14,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:27:14,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:27:14,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:27:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-22 14:27:14,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 14:27:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124282004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:14,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:14,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2021-11-22 14:27:14,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822117230] [2021-11-22 14:27:14,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:14,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 14:27:14,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 14:27:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:27:14,916 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-22 14:27:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:14,988 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-22 14:27:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:27:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2021-11-22 14:27:14,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:14,993 INFO L225 Difference]: With dead ends: 31 [2021-11-22 14:27:14,994 INFO L226 Difference]: Without dead ends: 27 [2021-11-22 14:27:14,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-11-22 14:27:14,998 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:14,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:27:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-22 14:27:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-22 14:27:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-22 14:27:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-22 14:27:15,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-11-22 14:27:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:15,021 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-22 14:27:15,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-22 14:27:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-22 14:27:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 14:27:15,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:15,025 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:15,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:15,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:15,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-11-22 14:27:15,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331722881] [2021-11-22 14:27:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:15,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:15,480 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 14:27:15,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:15,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331722881] [2021-11-22 14:27:15,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331722881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722553955] [2021-11-22 14:27:15,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:27:15,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:15,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:15,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:15,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:27:15,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-22 14:27:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 14:27:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-22 14:27:15,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:27:16,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722553955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:16,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:16,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2021-11-22 14:27:16,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738077117] [2021-11-22 14:27:16,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:16,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:27:16,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:27:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:27:16,678 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-22 14:27:16,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:16,774 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-22 14:27:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:27:16,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2021-11-22 14:27:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:16,776 INFO L225 Difference]: With dead ends: 34 [2021-11-22 14:27:16,776 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 14:27:16,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2021-11-22 14:27:16,777 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:16,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 14:27:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-22 14:27:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-22 14:27:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-22 14:27:16,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-11-22 14:27:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:16,784 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-22 14:27:16,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2021-11-22 14:27:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-22 14:27:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 14:27:16,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:16,786 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:16,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:17,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:17,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-11-22 14:27:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173721398] [2021-11-22 14:27:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:17,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-22 14:27:17,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:17,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173721398] [2021-11-22 14:27:17,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173721398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:17,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979179596] [2021-11-22 14:27:17,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:27:17,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:17,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:17,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:27:17,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-22 14:27:17,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:27:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-22 14:27:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-22 14:27:18,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979179596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:18,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:18,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2021-11-22 14:27:18,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753660336] [2021-11-22 14:27:18,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:18,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:27:18,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:27:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:27:18,796 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-22 14:27:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:18,909 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-22 14:27:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:27:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2021-11-22 14:27:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:18,911 INFO L225 Difference]: With dead ends: 37 [2021-11-22 14:27:18,911 INFO L226 Difference]: Without dead ends: 33 [2021-11-22 14:27:18,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-11-22 14:27:18,913 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:18,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 69 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-22 14:27:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-22 14:27:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-22 14:27:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-22 14:27:18,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-11-22 14:27:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:18,919 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-22 14:27:18,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2021-11-22 14:27:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-22 14:27:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 14:27:18,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:18,921 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:18,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:19,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:19,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-11-22 14:27:19,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:19,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753368131] [2021-11-22 14:27:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:19,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-22 14:27:19,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:19,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753368131] [2021-11-22 14:27:19,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753368131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:19,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173717746] [2021-11-22 14:27:19,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:27:19,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:19,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:19,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:19,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:27:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 14:27:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-22 14:27:19,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 14:27:21,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173717746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:21,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:21,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2021-11-22 14:27:21,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51043672] [2021-11-22 14:27:21,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:21,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 14:27:21,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:21,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 14:27:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:27:21,407 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-11-22 14:27:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:21,531 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-22 14:27:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:27:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2021-11-22 14:27:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:21,535 INFO L225 Difference]: With dead ends: 40 [2021-11-22 14:27:21,535 INFO L226 Difference]: Without dead ends: 36 [2021-11-22 14:27:21,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:27:21,538 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:21,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 62 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-22 14:27:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-22 14:27:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-22 14:27:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-22 14:27:21,550 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-11-22 14:27:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:21,551 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-22 14:27:21,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2021-11-22 14:27:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-22 14:27:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-22 14:27:21,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:21,556 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:21,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:21,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 14:27:21,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-11-22 14:27:21,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:21,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468482135] [2021-11-22 14:27:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:21,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:21,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:22,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:27:22,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468482135] [2021-11-22 14:27:22,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468482135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347474612] [2021-11-22 14:27:22,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:27:22,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:22,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:22,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:22,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:27:22,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:27:22,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:22,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 14:27:22,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:27:22,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:27:24,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347474612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:24,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:24,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2021-11-22 14:27:24,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789837098] [2021-11-22 14:27:24,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:24,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 14:27:24,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 14:27:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-11-22 14:27:24,761 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-22 14:27:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:24,887 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-22 14:27:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 14:27:24,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2021-11-22 14:27:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:24,893 INFO L225 Difference]: With dead ends: 43 [2021-11-22 14:27:24,893 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 14:27:24,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 14:27:24,897 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:24,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 81 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 14:27:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 14:27:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-22 14:27:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-22 14:27:24,918 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-11-22 14:27:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:24,918 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-22 14:27:24,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-22 14:27:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-22 14:27:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-22 14:27:24,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:24,922 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:24,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:25,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:25,140 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-11-22 14:27:25,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:25,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271550172] [2021-11-22 14:27:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:25,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-22 14:27:25,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:25,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271550172] [2021-11-22 14:27:25,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271550172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:25,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492868436] [2021-11-22 14:27:25,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:27:25,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:25,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:25,412 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:25,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:27:25,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-22 14:27:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:25,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 14:27:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-22 14:27:25,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-22 14:27:28,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492868436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:28,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2021-11-22 14:27:28,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550997445] [2021-11-22 14:27:28,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:28,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 14:27:28,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 14:27:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-11-22 14:27:28,865 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-11-22 14:27:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:29,041 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-22 14:27:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:27:29,041 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2021-11-22 14:27:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:29,042 INFO L225 Difference]: With dead ends: 46 [2021-11-22 14:27:29,042 INFO L226 Difference]: Without dead ends: 42 [2021-11-22 14:27:29,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2021-11-22 14:27:29,044 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:29,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 91 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-22 14:27:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-22 14:27:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-22 14:27:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-22 14:27:29,051 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-11-22 14:27:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:29,051 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-22 14:27:29,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2021-11-22 14:27:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-22 14:27:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:27:29,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:29,053 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:29,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:29,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:27:29,263 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:29,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-11-22 14:27:29,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:29,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136934094] [2021-11-22 14:27:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:29,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-22 14:27:29,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136934094] [2021-11-22 14:27:29,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136934094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583936496] [2021-11-22 14:27:29,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:27:29,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:29,592 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:29,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:27:29,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:27:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:27:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-22 14:27:29,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-22 14:27:33,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583936496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:33,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:33,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2021-11-22 14:27:33,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509760876] [2021-11-22 14:27:33,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:33,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-22 14:27:33,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-22 14:27:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-11-22 14:27:33,860 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-22 14:27:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:34,023 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-22 14:27:34,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 14:27:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2021-11-22 14:27:34,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:34,025 INFO L225 Difference]: With dead ends: 49 [2021-11-22 14:27:34,025 INFO L226 Difference]: Without dead ends: 45 [2021-11-22 14:27:34,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 14:27:34,027 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:34,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 92 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-22 14:27:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-22 14:27:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-22 14:27:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-22 14:27:34,033 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-11-22 14:27:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:34,034 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-22 14:27:34,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-22 14:27:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-22 14:27:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 14:27:34,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:34,036 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:34,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:34,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:34,263 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-11-22 14:27:34,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:34,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523434089] [2021-11-22 14:27:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:34,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-22 14:27:34,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523434089] [2021-11-22 14:27:34,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523434089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:34,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257396491] [2021-11-22 14:27:34,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:27:34,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:34,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:34,641 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:34,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:27:34,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-22 14:27:34,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 14:27:34,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-22 14:27:35,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-22 14:27:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257396491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:39,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:39,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2021-11-22 14:27:39,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950004467] [2021-11-22 14:27:39,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-22 14:27:39,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-22 14:27:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:27:39,835 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-11-22 14:27:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:40,018 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-22 14:27:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 14:27:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2021-11-22 14:27:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:40,020 INFO L225 Difference]: With dead ends: 52 [2021-11-22 14:27:40,020 INFO L226 Difference]: Without dead ends: 48 [2021-11-22 14:27:40,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 14:27:40,026 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:40,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 90 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-22 14:27:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-22 14:27:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-22 14:27:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-22 14:27:40,038 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-11-22 14:27:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:40,038 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-22 14:27:40,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2021-11-22 14:27:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-22 14:27:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-22 14:27:40,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:40,041 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:40,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:40,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 14:27:40,252 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-11-22 14:27:40,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345501584] [2021-11-22 14:27:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:40,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-22 14:27:40,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:40,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345501584] [2021-11-22 14:27:40,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345501584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:40,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104705752] [2021-11-22 14:27:40,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:27:40,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:40,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:40,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:27:41,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-22 14:27:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 14:27:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-22 14:27:41,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-22 14:27:47,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104705752] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:47,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:47,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2021-11-22 14:27:47,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861895600] [2021-11-22 14:27:47,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:47,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 14:27:47,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:47,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 14:27:47,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2021-11-22 14:27:47,174 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-11-22 14:27:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:47,337 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-11-22 14:27:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:27:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2021-11-22 14:27:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:47,340 INFO L225 Difference]: With dead ends: 55 [2021-11-22 14:27:47,340 INFO L226 Difference]: Without dead ends: 51 [2021-11-22 14:27:47,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2021-11-22 14:27:47,342 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:47,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 92 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:27:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-22 14:27:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-22 14:27:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-22 14:27:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-22 14:27:47,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-11-22 14:27:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:47,349 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-22 14:27:47,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2021-11-22 14:27:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-22 14:27:47,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-22 14:27:47,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:47,351 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:47,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:47,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:47,568 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-11-22 14:27:47,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:47,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099557923] [2021-11-22 14:27:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:47,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-22 14:27:48,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:48,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099557923] [2021-11-22 14:27:48,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099557923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:48,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521470845] [2021-11-22 14:27:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:27:48,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:48,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:48,019 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:48,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:27:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 14:27:48,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-22 14:27:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:27:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-22 14:27:56,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521470845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:27:56,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:27:56,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2021-11-22 14:27:56,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122625388] [2021-11-22 14:27:56,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:27:56,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-22 14:27:56,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:27:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-22 14:27:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 14:27:56,098 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-11-22 14:27:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:27:56,383 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-22 14:27:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 14:27:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2021-11-22 14:27:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:27:56,386 INFO L225 Difference]: With dead ends: 58 [2021-11-22 14:27:56,386 INFO L226 Difference]: Without dead ends: 54 [2021-11-22 14:27:56,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2021-11-22 14:27:56,388 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 384 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:27:56,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 107 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:27:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-22 14:27:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-22 14:27:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-22 14:27:56,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-22 14:27:56,397 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-11-22 14:27:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:27:56,398 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-22 14:27:56,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2021-11-22 14:27:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-22 14:27:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-22 14:27:56,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:27:56,401 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:27:56,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:27:56,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 14:27:56,623 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:27:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:27:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-11-22 14:27:56,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:27:56,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784265525] [2021-11-22 14:27:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:27:56,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:27:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:56,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:57,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:57,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:57,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:57,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:57,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:27:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:27:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-22 14:27:57,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:27:57,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784265525] [2021-11-22 14:27:57,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784265525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:27:57,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050019885] [2021-11-22 14:27:57,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:27:57,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:27:57,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:27:57,128 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:27:57,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 14:27:57,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:27:57,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:27:57,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-22 14:27:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:27:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-11-22 14:27:57,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:28:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-22 14:28:06,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050019885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:28:06,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:28:06,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 35 [2021-11-22 14:28:06,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035019345] [2021-11-22 14:28:06,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:28:06,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 14:28:06,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:28:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 14:28:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 14:28:06,837 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2021-11-22 14:28:07,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:28:07,075 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-11-22 14:28:07,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 14:28:07,075 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) Word has length 94 [2021-11-22 14:28:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:28:07,076 INFO L225 Difference]: With dead ends: 61 [2021-11-22 14:28:07,077 INFO L226 Difference]: Without dead ends: 57 [2021-11-22 14:28:07,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=833, Invalid=1617, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:28:07,079 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 195 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:28:07,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 112 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:28:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-22 14:28:07,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-22 14:28:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-22 14:28:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-22 14:28:07,088 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-11-22 14:28:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:28:07,088 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-22 14:28:07,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2021-11-22 14:28:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-22 14:28:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-22 14:28:07,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:28:07,091 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:28:07,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:28:07,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:28:07,310 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:28:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:28:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-11-22 14:28:07,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:28:07,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751503736] [2021-11-22 14:28:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:28:07,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:28:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:07,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-22 14:28:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:28:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-22 14:28:08,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:28:08,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751503736] [2021-11-22 14:28:08,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751503736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:28:08,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919610331] [2021-11-22 14:28:08,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:28:08,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:28:08,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:28:08,788 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:28:08,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 14:28:09,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-22 14:28:09,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:28:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-22 14:28:09,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:28:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-11-22 14:28:11,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:28:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-11-22 14:28:18,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919610331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:28:18,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:28:18,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2021-11-22 14:28:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569416619] [2021-11-22 14:28:18,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:28:18,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-22 14:28:18,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:28:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-22 14:28:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5775, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 14:28:18,013 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 79 states, 74 states have (on average 1.135135135135135) internal successors, (84), 46 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 32 states have return successors, (34), 33 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-22 14:28:20,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:28:20,462 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-22 14:28:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 14:28:20,463 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 74 states have (on average 1.135135135135135) internal successors, (84), 46 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 32 states have return successors, (34), 33 states have call predecessors, (34), 7 states have call successors, (34) Word has length 100 [2021-11-22 14:28:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:28:20,463 INFO L225 Difference]: With dead ends: 60 [2021-11-22 14:28:20,463 INFO L226 Difference]: Without dead ends: 0 [2021-11-22 14:28:20,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 173 SyntacticMatches, 17 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1005, Invalid=12105, Unknown=0, NotChecked=0, Total=13110 [2021-11-22 14:28:20,468 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:28:20,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 799 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 14:28:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-22 14:28:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-22 14:28:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:28:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-22 14:28:20,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-11-22 14:28:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:28:20,470 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-22 14:28:20,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 74 states have (on average 1.135135135135135) internal successors, (84), 46 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 32 states have return successors, (34), 33 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-22 14:28:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-22 14:28:20,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-22 14:28:20,473 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 14:28:20,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:28:20,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:28:20,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-22 14:28:20,700 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-22 14:28:20,700 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-22 14:28:20,700 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-22 14:28:20,700 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-22 14:28:20,700 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-11-22 14:28:20,700 INFO L858 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2021-11-22 14:28:20,701 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-11-22 14:28:20,701 INFO L854 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| 15)) [2021-11-22 14:28:20,701 INFO L858 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-11-22 14:28:20,701 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2021-11-22 14:28:20,702 INFO L858 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2021-11-22 14:28:20,702 INFO L854 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2021-11-22 14:28:20,702 INFO L858 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2021-11-22 14:28:20,702 INFO L858 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2021-11-22 14:28:20,702 INFO L858 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2021-11-22 14:28:20,702 INFO L861 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2021-11-22 14:28:20,706 INFO L732 BasicCegarLoop]: Path program histogram: [15, 1] [2021-11-22 14:28:20,708 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:28:20,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:28:20 BoogieIcfgContainer [2021-11-22 14:28:20,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:28:20,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:28:20,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:28:20,716 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:28:20,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:27:10" (3/4) ... [2021-11-22 14:28:20,723 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-22 14:28:20,743 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2021-11-22 14:28:20,748 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-22 14:28:20,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-22 14:28:20,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-22 14:28:20,751 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-22 14:28:20,783 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 14:28:20,783 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:28:20,785 INFO L158 Benchmark]: Toolchain (without parser) took 71356.12ms. Allocated memory was 111.1MB in the beginning and 408.9MB in the end (delta: 297.8MB). Free memory was 70.1MB in the beginning and 286.7MB in the end (delta: -216.6MB). Peak memory consumption was 79.7MB. Max. memory is 16.1GB. [2021-11-22 14:28:20,785 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory was 86.0MB in the beginning and 85.9MB in the end (delta: 69.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:28:20,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.10ms. Allocated memory is still 111.1MB. Free memory was 69.9MB in the beginning and 86.6MB in the end (delta: -16.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 14:28:20,787 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.54ms. Allocated memory is still 111.1MB. Free memory was 86.6MB in the beginning and 85.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:28:20,788 INFO L158 Benchmark]: Boogie Preprocessor took 25.17ms. Allocated memory is still 111.1MB. Free memory was 85.2MB in the beginning and 84.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:28:20,788 INFO L158 Benchmark]: RCFGBuilder took 307.87ms. Allocated memory is still 111.1MB. Free memory was 84.2MB in the beginning and 75.4MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:28:20,788 INFO L158 Benchmark]: TraceAbstraction took 70628.76ms. Allocated memory was 111.1MB in the beginning and 408.9MB in the end (delta: 297.8MB). Free memory was 75.1MB in the beginning and 289.4MB in the end (delta: -214.3MB). Peak memory consumption was 86.1MB. Max. memory is 16.1GB. [2021-11-22 14:28:20,789 INFO L158 Benchmark]: Witness Printer took 68.12ms. Allocated memory is still 408.9MB. Free memory was 289.4MB in the beginning and 286.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:28:20,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 111.1MB. Free memory was 86.0MB in the beginning and 85.9MB in the end (delta: 69.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.10ms. Allocated memory is still 111.1MB. Free memory was 69.9MB in the beginning and 86.6MB in the end (delta: -16.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.54ms. Allocated memory is still 111.1MB. Free memory was 86.6MB in the beginning and 85.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.17ms. Allocated memory is still 111.1MB. Free memory was 85.2MB in the beginning and 84.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 307.87ms. Allocated memory is still 111.1MB. Free memory was 84.2MB in the beginning and 75.4MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 70628.76ms. Allocated memory was 111.1MB in the beginning and 408.9MB in the end (delta: 297.8MB). Free memory was 75.1MB in the beginning and 289.4MB in the end (delta: -214.3MB). Peak memory consumption was 86.1MB. Max. memory is 16.1GB. * Witness Printer took 68.12ms. Allocated memory is still 408.9MB. Free memory was 289.4MB in the beginning and 286.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 70.5s, OverallIterations: 16, TraceHistogramMax: 16, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1846 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1679 mSDsluCounter, 1836 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1678 mSDsCounter, 817 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2569 IncrementalHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 817 mSolverCounterUnsat, 158 mSDtfsCounter, 2569 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2340 GetRequests, 1792 SyntacticMatches, 19 SemanticMatches, 529 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6547 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 58.1s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 2574 ConstructedInterpolants, 0 QuantifiedInterpolants, 8802 SizeOfPredicates, 142 NumberOfNonLiveVariables, 2925 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 46 InterpolantComputations, 1 PerfectInterpolantSequences, 5031/11520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-22 14:28:20,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0e16a9-b427-47b0-a0cc-410ace20164e/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE