./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF --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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:17:43,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:17:43,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:17:43,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:17:43,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:17:43,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:17:43,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:17:43,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:17:43,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:17:43,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:17:43,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:17:43,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:17:43,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:17:43,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:17:43,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:17:43,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:17:43,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:17:43,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:17:43,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:17:43,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:17:43,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:17:43,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:17:43,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:17:43,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:17:43,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:17:43,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:17:43,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:17:43,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:17:43,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:17:43,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:17:43,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:17:43,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:17:43,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:17:43,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:17:43,198 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:17:43,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:17:43,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:17:43,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:17:43,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:17:43,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:17:43,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:17:43,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:17:43,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:17:43,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:17:43,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:17:43,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:17:43,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:17:43,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:17:43,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:17:43,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:17:43,264 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:17:43,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:17:43,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:17:43,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:17:43,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:17:43,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:17:43,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:17:43,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:17:43,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:17:43,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:17:43,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:17:43,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:17:43,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:17:43,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:17:43,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:17:43,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:17:43,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:17:43,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:17:43,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:17:43,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:17:43,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:17:43,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:17:43,269 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:17:43,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:17:43,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:17:43,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:17:43,269 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_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2021-11-20 07:17:43,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:17:43,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:17:43,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:17:43,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:17:43,570 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:17:43,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-20 07:17:43,656 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/6e0cc8aca/89f6c33699a74c98b75b814ae20fc52e/FLAGbe4d17b1f [2021-11-20 07:17:44,199 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:17:44,200 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-20 07:17:44,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/6e0cc8aca/89f6c33699a74c98b75b814ae20fc52e/FLAGbe4d17b1f [2021-11-20 07:17:44,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/6e0cc8aca/89f6c33699a74c98b75b814ae20fc52e [2021-11-20 07:17:44,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:17:44,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:17:44,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:17:44,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:17:44,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:17:44,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:44,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431a3e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44, skipping insertion in model container [2021-11-20 07:17:44,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:44,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:17:44,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:17:44,879 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_371d8291-12ed-4f64-8e30-32ca1984aa3d/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-20 07:17:44,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:17:44,931 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:17:44,943 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_371d8291-12ed-4f64-8e30-32ca1984aa3d/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-20 07:17:44,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:17:44,988 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:17:44,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44 WrapperNode [2021-11-20 07:17:44,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:17:44,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:17:44,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:17:44,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:17:44,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,037 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-11-20 07:17:45,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:17:45,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:17:45,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:17:45,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:17:45,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:17:45,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:17:45,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:17:45,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:17:45,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (1/1) ... [2021-11-20 07:17:45,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:17:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:45,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:17:45,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:17:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:17:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:17:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:17:45,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:17:45,256 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:17:45,258 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:17:45,502 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:17:45,511 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:17:45,511 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 07:17:45,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:17:45 BoogieIcfgContainer [2021-11-20 07:17:45,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:17:45,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:17:45,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:17:45,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:17:45,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:17:44" (1/3) ... [2021-11-20 07:17:45,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:17:45, skipping insertion in model container [2021-11-20 07:17:45,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:17:44" (2/3) ... [2021-11-20 07:17:45,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:17:45, skipping insertion in model container [2021-11-20 07:17:45,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:17:45" (3/3) ... [2021-11-20 07:17:45,525 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-11-20 07:17:45,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:17:45,532 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:17:45,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:17:45,613 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 [2021-11-20 07:17:45,614 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:17:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:17:45,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:45,660 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:45,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:45,701 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-20 07:17:45,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:45,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283494213] [2021-11-20 07:17:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:45,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:45,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:45,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283494213] [2021-11-20 07:17:45,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283494213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:45,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:45,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:17:45,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472465087] [2021-11-20 07:17:45,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:45,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:17:45,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:17:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:17:46,042 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:46,074 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-20 07:17:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:17:46,078 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 07:17:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:46,091 INFO L225 Difference]: With dead ends: 57 [2021-11-20 07:17:46,092 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 07:17:46,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:17:46,103 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:46,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:17:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 07:17:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 07:17:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-20 07:17:46,156 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-20 07:17:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:46,157 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-20 07:17:46,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:46,158 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-20 07:17:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:17:46,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:46,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:46,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:17:46,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-20 07:17:46,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:46,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706819101] [2021-11-20 07:17:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:46,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:46,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706819101] [2021-11-20 07:17:46,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706819101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:46,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:46,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:17:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920863580] [2021-11-20 07:17:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:46,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:17:46,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:46,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:17:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:17:46,424 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:46,643 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-11-20 07:17:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:17:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 07:17:46,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:46,653 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:17:46,654 INFO L226 Difference]: Without dead ends: 61 [2021-11-20 07:17:46,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:17:46,657 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:46,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:17:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-20 07:17:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-20 07:17:46,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-11-20 07:17:46,681 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-11-20 07:17:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:46,683 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-11-20 07:17:46,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-11-20 07:17:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:17:46,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:46,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:46,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:17:46,692 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-11-20 07:17:46,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:46,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704366495] [2021-11-20 07:17:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:46,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:17:46,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704366495] [2021-11-20 07:17:46,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704366495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:46,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:46,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:17:46,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058335100] [2021-11-20 07:17:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:46,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:17:46,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:17:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:17:46,892 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:47,156 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-11-20 07:17:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:17:47,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 07:17:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:47,167 INFO L225 Difference]: With dead ends: 143 [2021-11-20 07:17:47,167 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 07:17:47,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:17:47,174 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:47,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:17:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 07:17:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-11-20 07:17:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-11-20 07:17:47,201 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-11-20 07:17:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:47,202 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-11-20 07:17:47,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-11-20 07:17:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:17:47,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:47,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:47,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:17:47,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-11-20 07:17:47,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:47,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250134318] [2021-11-20 07:17:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:47,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:17:47,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250134318] [2021-11-20 07:17:47,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250134318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:47,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:47,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:17:47,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636571147] [2021-11-20 07:17:47,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:47,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:17:47,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:17:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:17:47,369 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:47,656 INFO L93 Difference]: Finished difference Result 169 states and 250 transitions. [2021-11-20 07:17:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:17:47,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 07:17:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:47,659 INFO L225 Difference]: With dead ends: 169 [2021-11-20 07:17:47,659 INFO L226 Difference]: Without dead ends: 125 [2021-11-20 07:17:47,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:17:47,661 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:47,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 164 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:17:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-20 07:17:47,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-11-20 07:17:47,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2021-11-20 07:17:47,681 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2021-11-20 07:17:47,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:47,682 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2021-11-20 07:17:47,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2021-11-20 07:17:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 07:17:47,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:47,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:47,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:17:47,686 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2021-11-20 07:17:47,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:47,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519641221] [2021-11-20 07:17:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:47,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:17:47,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:47,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519641221] [2021-11-20 07:17:47,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519641221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:47,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:47,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:17:47,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267021210] [2021-11-20 07:17:47,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:47,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:17:47,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:47,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:17:47,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:17:47,849 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:47,861 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-11-20 07:17:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:17:47,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 07:17:47,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:47,864 INFO L225 Difference]: With dead ends: 124 [2021-11-20 07:17:47,864 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 07:17:47,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:17:47,868 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:47,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:17:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 07:17:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-20 07:17:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-11-20 07:17:47,878 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 20 [2021-11-20 07:17:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:47,879 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-11-20 07:17:47,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-11-20 07:17:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:17:47,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:47,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:47,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:17:47,882 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:47,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1388506533, now seen corresponding path program 1 times [2021-11-20 07:17:47,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:47,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586573567] [2021-11-20 07:17:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:47,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:47,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:47,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586573567] [2021-11-20 07:17:47,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586573567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:47,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:47,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:17:47,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052426676] [2021-11-20 07:17:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:47,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:17:47,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:17:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:17:47,946 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:47,959 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2021-11-20 07:17:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:17:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 07:17:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:47,961 INFO L225 Difference]: With dead ends: 81 [2021-11-20 07:17:47,961 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 07:17:47,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:17:47,963 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:47,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:17:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 07:17:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-20 07:17:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2021-11-20 07:17:47,973 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 26 [2021-11-20 07:17:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2021-11-20 07:17:47,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2021-11-20 07:17:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:17:47,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:47,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:47,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:17:47,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:47,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1130341095, now seen corresponding path program 1 times [2021-11-20 07:17:47,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:47,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377919949] [2021-11-20 07:17:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:47,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377919949] [2021-11-20 07:17:48,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377919949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664177748] [2021-11-20 07:17:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:48,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:48,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:48,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:17:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:17:48,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:48,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:17:48,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664177748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:48,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:17:48,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-20 07:17:48,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743471608] [2021-11-20 07:17:48,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:48,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:17:48,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:17:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:17:48,516 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:48,750 INFO L93 Difference]: Finished difference Result 156 states and 254 transitions. [2021-11-20 07:17:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:17:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 07:17:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:48,752 INFO L225 Difference]: With dead ends: 156 [2021-11-20 07:17:48,752 INFO L226 Difference]: Without dead ends: 122 [2021-11-20 07:17:48,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:17:48,754 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:48,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 59 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:17:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-20 07:17:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-11-20 07:17:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 101 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-11-20 07:17:48,775 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 26 [2021-11-20 07:17:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:48,776 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-11-20 07:17:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-11-20 07:17:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:17:48,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:48,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:48,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:49,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:49,010 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:49,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1226843574, now seen corresponding path program 1 times [2021-11-20 07:17:49,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:49,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575517763] [2021-11-20 07:17:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:49,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:17:49,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:49,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575517763] [2021-11-20 07:17:49,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575517763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:49,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982351563] [2021-11-20 07:17:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:49,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:49,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:49,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:49,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:17:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:17:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:17:49,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:17:49,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982351563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:49,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:17:49,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 07:17:49,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254192081] [2021-11-20 07:17:49,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:49,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:17:49,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:49,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:17:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:17:49,474 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:49,695 INFO L93 Difference]: Finished difference Result 243 states and 351 transitions. [2021-11-20 07:17:49,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:17:49,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 07:17:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:49,697 INFO L225 Difference]: With dead ends: 243 [2021-11-20 07:17:49,697 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 07:17:49,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:17:49,700 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:17:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 07:17:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-11-20 07:17:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 130 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2021-11-20 07:17:49,713 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 32 [2021-11-20 07:17:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:49,713 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2021-11-20 07:17:49,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2021-11-20 07:17:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:17:49,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:49,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:49,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:49,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:17:49,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1448774913, now seen corresponding path program 1 times [2021-11-20 07:17:49,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828372644] [2021-11-20 07:17:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:49,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:17:50,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:50,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828372644] [2021-11-20 07:17:50,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828372644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:50,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116399753] [2021-11-20 07:17:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:50,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:50,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:17:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:17:50,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:17:50,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:17:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116399753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:50,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:17:50,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-20 07:17:50,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363939380] [2021-11-20 07:17:50,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:50,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:17:50,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:17:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:17:50,423 INFO L87 Difference]: Start difference. First operand 131 states and 168 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:50,710 INFO L93 Difference]: Finished difference Result 302 states and 416 transitions. [2021-11-20 07:17:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:17:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-20 07:17:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:50,713 INFO L225 Difference]: With dead ends: 302 [2021-11-20 07:17:50,713 INFO L226 Difference]: Without dead ends: 190 [2021-11-20 07:17:50,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:17:50,715 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:50,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:17:50,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-20 07:17:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2021-11-20 07:17:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 159 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-11-20 07:17:50,753 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 38 [2021-11-20 07:17:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:50,753 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-11-20 07:17:50,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-11-20 07:17:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:17:50,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:50,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:50,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:50,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:50,957 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:50,957 INFO L85 PathProgramCache]: Analyzing trace with hash 882299696, now seen corresponding path program 1 times [2021-11-20 07:17:50,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:50,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973812516] [2021-11-20 07:17:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:50,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:17:51,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:51,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973812516] [2021-11-20 07:17:51,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973812516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:51,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162505976] [2021-11-20 07:17:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:51,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:51,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:51,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:51,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:17:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:51,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:17:51,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:17:51,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:17:51,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162505976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:51,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:17:51,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 07:17:51,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856750494] [2021-11-20 07:17:51,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:51,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:17:51,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:17:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:17:51,538 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:51,675 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2021-11-20 07:17:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:17:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 07:17:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:51,678 INFO L225 Difference]: With dead ends: 327 [2021-11-20 07:17:51,678 INFO L226 Difference]: Without dead ends: 150 [2021-11-20 07:17:51,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:17:51,680 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:51,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:17:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-20 07:17:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-11-20 07:17:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-11-20 07:17:51,689 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 44 [2021-11-20 07:17:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:51,690 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-11-20 07:17:51,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-11-20 07:17:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:17:51,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:51,693 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:51,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:17:51,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:17:51,906 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1716436880, now seen corresponding path program 1 times [2021-11-20 07:17:51,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473063654] [2021-11-20 07:17:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:51,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 07:17:52,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:52,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473063654] [2021-11-20 07:17:52,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473063654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:52,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:52,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:17:52,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076010987] [2021-11-20 07:17:52,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:52,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:17:52,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:17:52,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:17:52,030 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:52,322 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2021-11-20 07:17:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:17:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-20 07:17:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:52,327 INFO L225 Difference]: With dead ends: 491 [2021-11-20 07:17:52,327 INFO L226 Difference]: Without dead ends: 380 [2021-11-20 07:17:52,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:17:52,329 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:52,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 200 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:17:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-20 07:17:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 130. [2021-11-20 07:17:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-11-20 07:17:52,342 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 65 [2021-11-20 07:17:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:52,342 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-11-20 07:17:52,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-11-20 07:17:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:17:52,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:52,345 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:52,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:17:52,345 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:52,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash -865911640, now seen corresponding path program 1 times [2021-11-20 07:17:52,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:52,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898607680] [2021-11-20 07:17:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:52,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-20 07:17:52,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:52,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898607680] [2021-11-20 07:17:52,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898607680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:52,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:52,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:17:52,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407562862] [2021-11-20 07:17:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:52,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:17:52,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:17:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:17:52,550 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:52,680 INFO L93 Difference]: Finished difference Result 386 states and 482 transitions. [2021-11-20 07:17:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:17:52,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-20 07:17:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:52,684 INFO L225 Difference]: With dead ends: 386 [2021-11-20 07:17:52,684 INFO L226 Difference]: Without dead ends: 275 [2021-11-20 07:17:52,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:17:52,687 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:52,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:17:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-20 07:17:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 202. [2021-11-20 07:17:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.263681592039801) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-11-20 07:17:52,700 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 66 [2021-11-20 07:17:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:52,702 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-11-20 07:17:52,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-11-20 07:17:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:17:52,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:52,706 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:52,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:17:52,706 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash 511658858, now seen corresponding path program 1 times [2021-11-20 07:17:52,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:52,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142650407] [2021-11-20 07:17:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:52,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 07:17:52,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:52,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142650407] [2021-11-20 07:17:52,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142650407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:52,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:17:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069902503] [2021-11-20 07:17:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:52,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:17:52,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:17:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:17:52,905 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:53,457 INFO L93 Difference]: Finished difference Result 995 states and 1247 transitions. [2021-11-20 07:17:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:17:53,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-20 07:17:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:53,463 INFO L225 Difference]: With dead ends: 995 [2021-11-20 07:17:53,464 INFO L226 Difference]: Without dead ends: 812 [2021-11-20 07:17:53,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:17:53,465 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 203 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:53,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 335 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:17:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-20 07:17:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 202. [2021-11-20 07:17:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.263681592039801) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-11-20 07:17:53,483 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 66 [2021-11-20 07:17:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:53,484 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-11-20 07:17:53,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-11-20 07:17:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:17:53,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:53,485 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:53,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:17:53,486 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:53,487 INFO L85 PathProgramCache]: Analyzing trace with hash 309834924, now seen corresponding path program 1 times [2021-11-20 07:17:53,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:53,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186023488] [2021-11-20 07:17:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:53,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 07:17:53,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:53,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186023488] [2021-11-20 07:17:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186023488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:17:53,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:17:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 07:17:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686589448] [2021-11-20 07:17:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:17:53,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:17:53,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:17:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:17:53,625 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:54,268 INFO L93 Difference]: Finished difference Result 1014 states and 1267 transitions. [2021-11-20 07:17:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:17:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-20 07:17:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:54,274 INFO L225 Difference]: With dead ends: 1014 [2021-11-20 07:17:54,275 INFO L226 Difference]: Without dead ends: 831 [2021-11-20 07:17:54,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:17:54,276 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 271 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:54,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 389 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:17:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-20 07:17:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 198. [2021-11-20 07:17:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.2690355329949239) internal successors, (250), 197 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 250 transitions. [2021-11-20 07:17:54,291 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 250 transitions. Word has length 66 [2021-11-20 07:17:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:54,292 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 250 transitions. [2021-11-20 07:17:54,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 250 transitions. [2021-11-20 07:17:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:17:54,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:54,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:54,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:17:54,294 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1499003605, now seen corresponding path program 1 times [2021-11-20 07:17:54,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:54,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287120708] [2021-11-20 07:17:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:54,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:17:54,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:54,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287120708] [2021-11-20 07:17:54,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287120708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033929131] [2021-11-20 07:17:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:54,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:54,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:54,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:17:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:17:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:17:54,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:17:55,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033929131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:17:55,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:17:55,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2021-11-20 07:17:55,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73944808] [2021-11-20 07:17:55,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:55,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:17:55,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:17:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:17:55,189 INFO L87 Difference]: Start difference. First operand 198 states and 250 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:17:55,678 INFO L93 Difference]: Finished difference Result 936 states and 1184 transitions. [2021-11-20 07:17:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:17:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-20 07:17:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:17:55,684 INFO L225 Difference]: With dead ends: 936 [2021-11-20 07:17:55,684 INFO L226 Difference]: Without dead ends: 753 [2021-11-20 07:17:55,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:17:55,686 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 389 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:17:55,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 149 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:17:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-20 07:17:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 600. [2021-11-20 07:17:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.2771285475792988) internal successors, (765), 599 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 765 transitions. [2021-11-20 07:17:55,747 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 765 transitions. Word has length 68 [2021-11-20 07:17:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:17:55,747 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 765 transitions. [2021-11-20 07:17:55,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:17:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 765 transitions. [2021-11-20 07:17:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:17:55,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:17:55,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:17:55,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:17:55,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:55,963 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:17:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:17:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1439601588, now seen corresponding path program 1 times [2021-11-20 07:17:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:17:55,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900070025] [2021-11-20 07:17:55,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:55,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:17:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:17:56,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:17:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900070025] [2021-11-20 07:17:56,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900070025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:17:56,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592976044] [2021-11-20 07:17:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:17:56,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:17:56,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:17:56,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:17:56,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:17:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:17:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:17:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:17:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-20 07:17:58,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:17:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 07:17:58,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592976044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:17:58,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:17:58,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2021-11-20 07:17:58,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022413273] [2021-11-20 07:17:58,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:17:58,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:17:58,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:17:58,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:17:58,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:17:58,669 INFO L87 Difference]: Start difference. First operand 600 states and 765 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:00,030 INFO L93 Difference]: Finished difference Result 1746 states and 2221 transitions. [2021-11-20 07:18:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:18:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 07:18:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:00,039 INFO L225 Difference]: With dead ends: 1746 [2021-11-20 07:18:00,039 INFO L226 Difference]: Without dead ends: 1302 [2021-11-20 07:18:00,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:18:00,041 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 530 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:00,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 437 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 604 Invalid, 0 Unknown, 173 Unchecked, 0.8s Time] [2021-11-20 07:18:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-20 07:18:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 912. [2021-11-20 07:18:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.300768386388584) internal successors, (1185), 911 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1185 transitions. [2021-11-20 07:18:00,087 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1185 transitions. Word has length 70 [2021-11-20 07:18:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:00,087 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1185 transitions. [2021-11-20 07:18:00,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1185 transitions. [2021-11-20 07:18:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:18:00,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:00,090 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:00,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:00,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:18:00,295 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:00,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1493994486, now seen corresponding path program 1 times [2021-11-20 07:18:00,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502443064] [2021-11-20 07:18:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:00,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 07:18:00,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:18:00,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502443064] [2021-11-20 07:18:00,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502443064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:18:00,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164869003] [2021-11-20 07:18:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:00,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:18:00,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:00,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:18:00,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:18:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:18:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 07:18:00,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 07:18:01,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164869003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:01,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:18:01,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-20 07:18:01,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794452392] [2021-11-20 07:18:01,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:01,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:18:01,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:18:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:18:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:18:01,244 INFO L87 Difference]: Start difference. First operand 912 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:01,850 INFO L93 Difference]: Finished difference Result 1970 states and 2529 transitions. [2021-11-20 07:18:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:18:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 07:18:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:01,859 INFO L225 Difference]: With dead ends: 1970 [2021-11-20 07:18:01,859 INFO L226 Difference]: Without dead ends: 1085 [2021-11-20 07:18:01,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:18:01,862 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 243 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:01,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 552 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:18:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-20 07:18:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 688. [2021-11-20 07:18:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2925764192139737) internal successors, (888), 687 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 888 transitions. [2021-11-20 07:18:01,909 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 888 transitions. Word has length 70 [2021-11-20 07:18:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:01,909 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 888 transitions. [2021-11-20 07:18:01,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 888 transitions. [2021-11-20 07:18:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:18:01,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:01,911 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:01,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:02,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:18:02,134 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:02,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 2 times [2021-11-20 07:18:02,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:18:02,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976745047] [2021-11-20 07:18:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:02,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:18:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:18:02,209 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:18:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:18:02,306 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:18:02,306 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 07:18:02,307 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:18:02,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 07:18:02,314 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:02,317 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:18:02,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:18:02 BoogieIcfgContainer [2021-11-20 07:18:02,444 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:18:02,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:18:02,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:18:02,445 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:18:02,446 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:17:45" (3/4) ... [2021-11-20 07:18:02,449 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 07:18:02,450 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:18:02,451 INFO L158 Benchmark]: Toolchain (without parser) took 17866.97ms. Allocated memory was 109.1MB in the beginning and 195.0MB in the end (delta: 86.0MB). Free memory was 72.3MB in the beginning and 93.3MB in the end (delta: -21.0MB). Peak memory consumption was 64.0MB. Max. memory is 16.1GB. [2021-11-20 07:18:02,451 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:18:02,452 INFO L158 Benchmark]: CACSL2BoogieTranslator took 404.00ms. Allocated memory is still 109.1MB. Free memory was 72.1MB in the beginning and 81.7MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:18:02,452 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.71ms. Allocated memory is still 109.1MB. Free memory was 81.7MB in the beginning and 79.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:18:02,453 INFO L158 Benchmark]: Boogie Preprocessor took 33.47ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:18:02,454 INFO L158 Benchmark]: RCFGBuilder took 440.64ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 66.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 07:18:02,454 INFO L158 Benchmark]: TraceAbstraction took 16928.29ms. Allocated memory was 109.1MB in the beginning and 195.0MB in the end (delta: 86.0MB). Free memory was 65.8MB in the beginning and 93.3MB in the end (delta: -27.5MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. [2021-11-20 07:18:02,455 INFO L158 Benchmark]: Witness Printer took 5.36ms. Allocated memory is still 195.0MB. Free memory is still 93.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:18:02,465 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 109.1MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 404.00ms. Allocated memory is still 109.1MB. Free memory was 72.1MB in the beginning and 81.7MB in the end (delta: -9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.71ms. Allocated memory is still 109.1MB. Free memory was 81.7MB in the beginning and 79.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.47ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 78.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.64ms. Allocated memory is still 109.1MB. Free memory was 78.7MB in the beginning and 66.4MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16928.29ms. Allocated memory was 109.1MB in the beginning and 195.0MB in the end (delta: 86.0MB). Free memory was 65.8MB in the beginning and 93.3MB in the end (delta: -27.5MB). Peak memory consumption was 60.1MB. Max. memory is 16.1GB. * Witness Printer took 5.36ms. Allocated memory is still 195.0MB. Free memory is still 93.3MB. There was no memory consumed. 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 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L126] b = __VERIFIER_nondet_uint() [L128] a = 234770789 [L130] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4] [L59] COND FALSE !(a3 == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4] [L68] nb = (unsigned char)4 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L89] COND TRUE i < nb VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L95] COND TRUE partial_sum > ((unsigned char)255) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=1, na=4, nb=1, partial_sum=20838, r0=234770790] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L85] COND TRUE i == (unsigned char)1 [L85] partial_sum = partial_sum + a1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L86] COND TRUE i == (unsigned char)2 [L86] partial_sum = partial_sum + a2 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L87] COND TRUE i == (unsigned char)3 [L87] partial_sum = partial_sum + a3 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=234770789, \old(b)=255, \result=3, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r=3, r0=234770790, r1=82, r2=254, r3=13] [L130] RET, EXPR mp_add(a, b) [L130] r = mp_add(a, b) [L132] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.7s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 6.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2314 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2314 mSDsluCounter, 3112 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 173 IncrementalHoareTripleChecker+Unchecked, 2043 mSDsCounter, 275 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3105 IncrementalHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 275 mSolverCounterUnsat, 1069 mSDtfsCounter, 3105 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 695 GetRequests, 564 SyntacticMatches, 17 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=912occurred in iteration=16, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 2693 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 1136 NumberOfCodeBlocks, 1136 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1247 ConstructedInterpolants, 26 QuantifiedInterpolants, 6493 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1029 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 27 InterpolantComputations, 14 PerfectInterpolantSequences, 1079/1138 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-20 07:18:02,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF --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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:18:05,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:18:05,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:18:05,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:18:05,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:18:05,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:18:05,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:18:05,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:18:05,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:18:05,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:18:05,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:18:05,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:18:05,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:18:05,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:18:05,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:18:05,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:18:05,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:18:05,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:18:05,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:18:05,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:18:05,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:18:05,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:18:05,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:18:05,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:18:05,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:18:05,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:18:05,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:18:05,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:18:05,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:18:05,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:18:05,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:18:05,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:18:05,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:18:05,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:18:05,604 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:18:05,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:18:05,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:18:05,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:18:05,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:18:05,610 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:18:05,611 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:18:05,612 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-20 07:18:05,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:18:05,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:18:05,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:18:05,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:18:05,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:18:05,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:18:05,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:18:05,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:18:05,675 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:18:05,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:18:05,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:18:05,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:18:05,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:18:05,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:18:05,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:18:05,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:18:05,679 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:18:05,679 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 07:18:05,679 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 07:18:05,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:18:05,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:18:05,680 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:18:05,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:18:05,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:18:05,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:18:05,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:18:05,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:18:05,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:18:05,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:18:05,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:18:05,683 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 07:18:05,683 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 07:18:05,684 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:18:05,684 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:18:05,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:18:05,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:18:05,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 07:18:05,686 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2021-11-20 07:18:06,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:18:06,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:18:06,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:18:06,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:18:06,176 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:18:06,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-20 07:18:06,271 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/1c7033b90/06be977d910646f394f0960aefc894a3/FLAG19249b8e3 [2021-11-20 07:18:06,999 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:18:06,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-20 07:18:07,013 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/1c7033b90/06be977d910646f394f0960aefc894a3/FLAG19249b8e3 [2021-11-20 07:18:07,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/data/1c7033b90/06be977d910646f394f0960aefc894a3 [2021-11-20 07:18:07,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:18:07,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:18:07,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:18:07,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:18:07,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:18:07,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381befe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07, skipping insertion in model container [2021-11-20 07:18:07,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:18:07,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:18:07,576 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_371d8291-12ed-4f64-8e30-32ca1984aa3d/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-20 07:18:07,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:18:07,656 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:18:07,722 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_371d8291-12ed-4f64-8e30-32ca1984aa3d/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-20 07:18:07,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:18:07,809 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:18:07,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07 WrapperNode [2021-11-20 07:18:07,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:18:07,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:18:07,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:18:07,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:18:07,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,892 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-11-20 07:18:07,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:18:07,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:18:07,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:18:07,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:18:07,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:18:07,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:18:07,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:18:07,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:18:07,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (1/1) ... [2021-11-20 07:18:07,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:18:08,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:18:08,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:18:08,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:18:08,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:18:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 07:18:08,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:18:08,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:18:08,181 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:18:08,183 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:18:08,546 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:18:08,554 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:18:08,569 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 07:18:08,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:18:08 BoogieIcfgContainer [2021-11-20 07:18:08,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:18:08,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:18:08,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:18:08,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:18:08,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:18:07" (1/3) ... [2021-11-20 07:18:08,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bf6b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:18:08, skipping insertion in model container [2021-11-20 07:18:08,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:18:07" (2/3) ... [2021-11-20 07:18:08,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bf6b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:18:08, skipping insertion in model container [2021-11-20 07:18:08,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:18:08" (3/3) ... [2021-11-20 07:18:08,580 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-11-20 07:18:08,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:18:08,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:18:08,648 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:18:08,657 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 [2021-11-20 07:18:08,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:18:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:18:08,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:08,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:08,682 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-20 07:18:08,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:08,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735749135] [2021-11-20 07:18:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:08,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:08,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:08,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:18:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:08,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 07:18:08,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:08,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:08,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:08,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735749135] [2021-11-20 07:18:08,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735749135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:18:08,963 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:18:08,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 07:18:08,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247011766] [2021-11-20 07:18:08,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:18:08,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:18:08,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:09,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:18:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:18:09,016 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:09,047 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-20 07:18:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:18:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 07:18:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:09,062 INFO L225 Difference]: With dead ends: 57 [2021-11-20 07:18:09,062 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 07:18:09,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:18:09,074 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:09,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:18:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 07:18:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 07:18:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-20 07:18:09,131 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-20 07:18:09,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:09,132 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-20 07:18:09,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:09,133 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-20 07:18:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 07:18:09,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:09,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:09,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:09,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:09,354 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:09,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-20 07:18:09,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:09,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345303187] [2021-11-20 07:18:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:09,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:09,358 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:09,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:18:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:18:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:09,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:09,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:09,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345303187] [2021-11-20 07:18:09,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345303187] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:18:09,609 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:18:09,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 07:18:09,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776124230] [2021-11-20 07:18:09,610 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:18:09,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:18:09,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:18:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:18:09,622 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:10,091 INFO L93 Difference]: Finished difference Result 172 states and 301 transitions. [2021-11-20 07:18:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:18:10,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 07:18:10,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:10,096 INFO L225 Difference]: With dead ends: 172 [2021-11-20 07:18:10,096 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 07:18:10,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:18:10,119 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 226 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:10,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 170 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:18:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 07:18:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-11-20 07:18:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 111 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 183 transitions. [2021-11-20 07:18:10,146 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 183 transitions. Word has length 12 [2021-11-20 07:18:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:10,147 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 183 transitions. [2021-11-20 07:18:10,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 183 transitions. [2021-11-20 07:18:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:18:10,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:10,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:10,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:10,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:10,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:10,365 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-11-20 07:18:10,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:10,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604742961] [2021-11-20 07:18:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:10,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:10,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:10,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:10,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:18:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:10,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:18:10,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:10,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:10,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604742961] [2021-11-20 07:18:10,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604742961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:18:10,616 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:18:10,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-20 07:18:10,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493518423] [2021-11-20 07:18:10,617 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:18:10,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:18:10,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:10,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:18:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:18:10,620 INFO L87 Difference]: Start difference. First operand 112 states and 183 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:11,617 INFO L93 Difference]: Finished difference Result 345 states and 594 transitions. [2021-11-20 07:18:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:18:11,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 07:18:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:11,623 INFO L225 Difference]: With dead ends: 345 [2021-11-20 07:18:11,623 INFO L226 Difference]: Without dead ends: 300 [2021-11-20 07:18:11,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:18:11,627 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 925 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:11,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:18:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-20 07:18:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 225. [2021-11-20 07:18:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6383928571428572) internal successors, (367), 224 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 367 transitions. [2021-11-20 07:18:11,661 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 367 transitions. Word has length 14 [2021-11-20 07:18:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:11,662 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 367 transitions. [2021-11-20 07:18:11,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 367 transitions. [2021-11-20 07:18:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:18:11,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:11,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:11,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:11,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:11,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash -842586557, now seen corresponding path program 1 times [2021-11-20 07:18:11,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124074901] [2021-11-20 07:18:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:11,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:11,887 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:11,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:18:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:11,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:18:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:12,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:12,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:12,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124074901] [2021-11-20 07:18:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124074901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:18:12,174 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:18:12,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 07:18:12,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938406799] [2021-11-20 07:18:12,175 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:18:12,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:18:12,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:12,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:18:12,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:18:12,179 INFO L87 Difference]: Start difference. First operand 225 states and 367 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:12,611 INFO L93 Difference]: Finished difference Result 1018 states and 1671 transitions. [2021-11-20 07:18:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:18:12,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 07:18:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:12,633 INFO L225 Difference]: With dead ends: 1018 [2021-11-20 07:18:12,633 INFO L226 Difference]: Without dead ends: 818 [2021-11-20 07:18:12,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:18:12,637 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 209 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:12,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 187 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:18:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-20 07:18:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 467. [2021-11-20 07:18:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.53862660944206) internal successors, (717), 466 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 717 transitions. [2021-11-20 07:18:12,699 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 717 transitions. Word has length 26 [2021-11-20 07:18:12,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:12,700 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 717 transitions. [2021-11-20 07:18:12,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:12,700 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 717 transitions. [2021-11-20 07:18:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:18:12,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:12,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:12,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:12,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:12,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:12,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1924928046, now seen corresponding path program 1 times [2021-11-20 07:18:12,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:12,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149920441] [2021-11-20 07:18:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:12,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:12,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:12,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:12,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:18:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:18:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:18:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:18:13,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:13,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149920441] [2021-11-20 07:18:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149920441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:18:13,114 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:18:13,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 07:18:13,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472932261] [2021-11-20 07:18:13,118 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:18:13,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:18:13,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:13,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:18:13,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:18:13,121 INFO L87 Difference]: Start difference. First operand 467 states and 717 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:13,140 INFO L93 Difference]: Finished difference Result 498 states and 759 transitions. [2021-11-20 07:18:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:18:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 07:18:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:13,144 INFO L225 Difference]: With dead ends: 498 [2021-11-20 07:18:13,144 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 07:18:13,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:18:13,151 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 114 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:13,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:18:13,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 07:18:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-20 07:18:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.4517374517374517) internal successors, (376), 259 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 376 transitions. [2021-11-20 07:18:13,185 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 376 transitions. Word has length 28 [2021-11-20 07:18:13,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:13,185 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 376 transitions. [2021-11-20 07:18:13,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 376 transitions. [2021-11-20 07:18:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:18:13,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:13,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:13,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:13,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1899874836, now seen corresponding path program 1 times [2021-11-20 07:18:13,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610225770] [2021-11-20 07:18:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:13,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:13,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:13,422 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:18:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:18:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:13,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:13,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:13,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610225770] [2021-11-20 07:18:13,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610225770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:18:13,803 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:18:13,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 07:18:13,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815565516] [2021-11-20 07:18:13,805 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:18:13,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:18:13,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:13,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:18:13,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:18:13,808 INFO L87 Difference]: Start difference. First operand 260 states and 376 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:13,913 INFO L93 Difference]: Finished difference Result 578 states and 860 transitions. [2021-11-20 07:18:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:18:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-20 07:18:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:13,916 INFO L225 Difference]: With dead ends: 578 [2021-11-20 07:18:13,916 INFO L226 Difference]: Without dead ends: 341 [2021-11-20 07:18:13,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:18:13,921 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:13,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-11-20 07:18:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-20 07:18:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 321. [2021-11-20 07:18:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.378125) internal successors, (441), 320 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 441 transitions. [2021-11-20 07:18:13,935 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 441 transitions. Word has length 43 [2021-11-20 07:18:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 441 transitions. [2021-11-20 07:18:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 441 transitions. [2021-11-20 07:18:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:18:13,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:13,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:13,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-20 07:18:14,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:14,153 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:14,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1296972944, now seen corresponding path program 1 times [2021-11-20 07:18:14,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:14,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186132846] [2021-11-20 07:18:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:14,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:14,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:14,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:18:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:18:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:14,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:14,618 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186132846] [2021-11-20 07:18:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186132846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:14,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:14,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:18:14,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310347564] [2021-11-20 07:18:14,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:14,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:18:14,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:18:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:18:14,634 INFO L87 Difference]: Start difference. First operand 321 states and 441 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:15,113 INFO L93 Difference]: Finished difference Result 1203 states and 1723 transitions. [2021-11-20 07:18:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:18:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 07:18:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:15,121 INFO L225 Difference]: With dead ends: 1203 [2021-11-20 07:18:15,121 INFO L226 Difference]: Without dead ends: 905 [2021-11-20 07:18:15,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:18:15,124 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 380 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:15,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 415 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:18:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-11-20 07:18:15,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 438. [2021-11-20 07:18:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.4393592677345537) internal successors, (629), 437 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:15,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 629 transitions. [2021-11-20 07:18:15,153 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 629 transitions. Word has length 44 [2021-11-20 07:18:15,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:15,154 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 629 transitions. [2021-11-20 07:18:15,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 629 transitions. [2021-11-20 07:18:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:18:15,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:15,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:15,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:15,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:15,369 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:15,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1555138382, now seen corresponding path program 1 times [2021-11-20 07:18:15,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:15,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613941376] [2021-11-20 07:18:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:15,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:15,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:15,372 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:15,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:18:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:15,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:18:15,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:15,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:15,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613941376] [2021-11-20 07:18:15,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613941376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:15,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:15,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:18:15,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218959404] [2021-11-20 07:18:15,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:15,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:18:15,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:18:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:18:15,943 INFO L87 Difference]: Start difference. First operand 438 states and 629 transitions. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:16,339 INFO L93 Difference]: Finished difference Result 1402 states and 2227 transitions. [2021-11-20 07:18:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:18:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 07:18:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:16,354 INFO L225 Difference]: With dead ends: 1402 [2021-11-20 07:18:16,355 INFO L226 Difference]: Without dead ends: 984 [2021-11-20 07:18:16,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:18:16,357 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 315 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:16,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 78 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:18:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-20 07:18:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-11-20 07:18:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.4697986577181208) internal successors, (1095), 745 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:16,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1095 transitions. [2021-11-20 07:18:16,399 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1095 transitions. Word has length 44 [2021-11-20 07:18:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:16,400 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1095 transitions. [2021-11-20 07:18:16,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1095 transitions. [2021-11-20 07:18:16,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:18:16,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:16,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:16,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:16,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:16,622 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:16,623 INFO L85 PathProgramCache]: Analyzing trace with hash 464635188, now seen corresponding path program 1 times [2021-11-20 07:18:16,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:16,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27437401] [2021-11-20 07:18:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:16,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:16,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:16,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:18:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:18:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:18:16,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:18:17,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:17,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27437401] [2021-11-20 07:18:17,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27437401] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:17,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:17,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-20 07:18:17,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193309321] [2021-11-20 07:18:17,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:17,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:18:17,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:18:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:18:17,203 INFO L87 Difference]: Start difference. First operand 746 states and 1095 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:17,538 INFO L93 Difference]: Finished difference Result 1828 states and 2554 transitions. [2021-11-20 07:18:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:18:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 07:18:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:17,547 INFO L225 Difference]: With dead ends: 1828 [2021-11-20 07:18:17,547 INFO L226 Difference]: Without dead ends: 1105 [2021-11-20 07:18:17,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:18:17,552 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 172 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:17,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 329 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:18:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-11-20 07:18:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 699. [2021-11-20 07:18:17,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 1.4126074498567336) internal successors, (986), 698 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 986 transitions. [2021-11-20 07:18:17,598 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 986 transitions. Word has length 70 [2021-11-20 07:18:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:17,601 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 986 transitions. [2021-11-20 07:18:17,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:17,602 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 986 transitions. [2021-11-20 07:18:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:18:17,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:17,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:17,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:17,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:17,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 2 times [2021-11-20 07:18:17,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96992552] [2021-11-20 07:18:17,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:18:17,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:17,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:17,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:18:17,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:18:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:18:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 07:18:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:23,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:27,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:27,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96992552] [2021-11-20 07:18:27,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96992552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:27,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:27,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-11-20 07:18:27,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610395515] [2021-11-20 07:18:27,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:27,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-20 07:18:27,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:27,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-20 07:18:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:18:27,043 INFO L87 Difference]: Start difference. First operand 699 states and 986 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:18:47,964 INFO L93 Difference]: Finished difference Result 3287 states and 4454 transitions. [2021-11-20 07:18:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-20 07:18:47,966 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-20 07:18:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:18:48,023 INFO L225 Difference]: With dead ends: 3287 [2021-11-20 07:18:48,024 INFO L226 Difference]: Without dead ends: 3007 [2021-11-20 07:18:48,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=2500, Invalid=12506, Unknown=0, NotChecked=0, Total=15006 [2021-11-20 07:18:48,036 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 2091 mSDsluCounter, 11093 mSDsCounter, 0 mSdLazyCounter, 6255 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 11595 SdHoareTripleChecker+Invalid, 6753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 6255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:18:48,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2091 Valid, 11595 Invalid, 6753 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [498 Valid, 6255 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-20 07:18:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-11-20 07:18:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1405. [2021-11-20 07:18:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.4586894586894588) internal successors, (2048), 1404 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2048 transitions. [2021-11-20 07:18:48,180 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2048 transitions. Word has length 70 [2021-11-20 07:18:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:18:48,180 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2048 transitions. [2021-11-20 07:18:48,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:18:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2048 transitions. [2021-11-20 07:18:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 07:18:48,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:18:48,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:18:48,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:18:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:18:48,403 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:18:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:18:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1235371034, now seen corresponding path program 1 times [2021-11-20 07:18:48,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:18:48,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638653126] [2021-11-20 07:18:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:18:48,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:18:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:18:48,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:18:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:18:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:18:48,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-20 07:18:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:18:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:53,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:18:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:18:58,295 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:18:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638653126] [2021-11-20 07:18:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638653126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:18:58,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:18:58,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-20 07:18:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033190955] [2021-11-20 07:18:58,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:18:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:18:58,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:18:58,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:18:58,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:18:58,299 INFO L87 Difference]: Start difference. First operand 1405 states and 2048 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:16,848 INFO L93 Difference]: Finished difference Result 7516 states and 10072 transitions. [2021-11-20 07:20:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-11-20 07:20:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-20 07:20:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:16,894 INFO L225 Difference]: With dead ends: 7516 [2021-11-20 07:20:16,894 INFO L226 Difference]: Without dead ends: 6731 [2021-11-20 07:20:16,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23597 ImplicationChecksByTransitivity, 65.0s TimeCoverageRelationStatistics Valid=8884, Invalid=62138, Unknown=0, NotChecked=0, Total=71022 [2021-11-20 07:20:16,918 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 2874 mSDsluCounter, 20333 mSDsCounter, 0 mSdLazyCounter, 12647 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2874 SdHoareTripleChecker+Valid, 21235 SdHoareTripleChecker+Invalid, 13339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 12647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:16,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2874 Valid, 21235 Invalid, 13339 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [692 Valid, 12647 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2021-11-20 07:20:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2021-11-20 07:20:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 3258. [2021-11-20 07:20:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.4501074608535462) internal successors, (4723), 3257 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 4723 transitions. [2021-11-20 07:20:17,203 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 4723 transitions. Word has length 74 [2021-11-20 07:20:17,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:17,204 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 4723 transitions. [2021-11-20 07:20:17,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:17,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 4723 transitions. [2021-11-20 07:20:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 07:20:17,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:17,208 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:17,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:17,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:20:17,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash -877944922, now seen corresponding path program 1 times [2021-11-20 07:20:17,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:20:17,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313763770] [2021-11-20 07:20:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:17,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:20:17,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:20:17,423 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:20:17,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:20:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:17,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 07:20:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:21,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:25,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:20:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313763770] [2021-11-20 07:20:25,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313763770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:20:25,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:25,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-20 07:20:25,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476187998] [2021-11-20 07:20:25,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:25,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:20:25,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:20:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:20:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:20:25,999 INFO L87 Difference]: Start difference. First operand 3258 states and 4723 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:20:58,561 INFO L93 Difference]: Finished difference Result 6700 states and 9207 transitions. [2021-11-20 07:20:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-20 07:20:58,562 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-20 07:20:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:20:58,591 INFO L225 Difference]: With dead ends: 6700 [2021-11-20 07:20:58,591 INFO L226 Difference]: Without dead ends: 5876 [2021-11-20 07:20:58,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5091 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=2615, Invalid=18265, Unknown=0, NotChecked=0, Total=20880 [2021-11-20 07:20:58,596 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 1878 mSDsluCounter, 11223 mSDsCounter, 0 mSdLazyCounter, 6547 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 11759 SdHoareTripleChecker+Invalid, 6869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 6547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:20:58,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 11759 Invalid, 6869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 6547 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-11-20 07:20:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-11-20 07:20:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 3451. [2021-11-20 07:20:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.447536231884058) internal successors, (4994), 3450 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 4994 transitions. [2021-11-20 07:20:58,875 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 4994 transitions. Word has length 74 [2021-11-20 07:20:58,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:20:58,875 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 4994 transitions. [2021-11-20 07:20:58,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:20:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 4994 transitions. [2021-11-20 07:20:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:20:58,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:20:58,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:20:58,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:20:59,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:20:59,098 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:20:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:20:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash -904299993, now seen corresponding path program 1 times [2021-11-20 07:20:59,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:20:59,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207209064] [2021-11-20 07:20:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:20:59,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:20:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:20:59,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:20:59,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:20:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:20:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:20:59,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:20:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:59,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:20:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:20:59,947 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:20:59,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207209064] [2021-11-20 07:20:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207209064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:20:59,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:20:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 07:20:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175285963] [2021-11-20 07:20:59,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:20:59,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:20:59,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:20:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:20:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:20:59,951 INFO L87 Difference]: Start difference. First operand 3451 states and 4994 transitions. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:21:00,317 INFO L93 Difference]: Finished difference Result 3853 states and 5527 transitions. [2021-11-20 07:21:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:21:00,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-20 07:21:00,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:21:00,343 INFO L225 Difference]: With dead ends: 3853 [2021-11-20 07:21:00,343 INFO L226 Difference]: Without dead ends: 3823 [2021-11-20 07:21:00,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:21:00,346 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:21:00,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 160 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-11-20 07:21:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-11-20 07:21:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3754. [2021-11-20 07:21:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 1.4436450839328536) internal successors, (5418), 3753 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 5418 transitions. [2021-11-20 07:21:00,678 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 5418 transitions. Word has length 76 [2021-11-20 07:21:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:21:00,679 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 5418 transitions. [2021-11-20 07:21:00,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:21:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 5418 transitions. [2021-11-20 07:21:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:21:00,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:21:00,685 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:21:00,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-20 07:21:00,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:21:00,899 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:21:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:21:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1461199560, now seen corresponding path program 1 times [2021-11-20 07:21:00,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:21:00,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157488076] [2021-11-20 07:21:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:21:00,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:21:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:21:00,903 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:21:00,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 07:21:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:21:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:21:00,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:21:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:21:06,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:21:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:21:13,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:21:13,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157488076] [2021-11-20 07:21:13,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157488076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:21:13,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:21:13,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-20 07:21:13,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016256556] [2021-11-20 07:21:13,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:21:13,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:21:13,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:21:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:21:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:21:13,112 INFO L87 Difference]: Start difference. First operand 3754 states and 5418 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:16,366 INFO L93 Difference]: Finished difference Result 6117 states and 8538 transitions. [2021-11-20 07:22:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-11-20 07:22:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 07:22:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:16,393 INFO L225 Difference]: With dead ends: 6117 [2021-11-20 07:22:16,393 INFO L226 Difference]: Without dead ends: 5915 [2021-11-20 07:22:16,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=4854, Invalid=34548, Unknown=0, NotChecked=0, Total=39402 [2021-11-20 07:22:16,399 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 2434 mSDsluCounter, 10953 mSDsCounter, 0 mSdLazyCounter, 6537 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 11406 SdHoareTripleChecker+Invalid, 7051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 6537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:16,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 11406 Invalid, 7051 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [514 Valid, 6537 Invalid, 0 Unknown, 0 Unchecked, 12.4s Time] [2021-11-20 07:22:16,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-11-20 07:22:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 4353. [2021-11-20 07:22:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 1.4418658088235294) internal successors, (6275), 4352 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 6275 transitions. [2021-11-20 07:22:16,729 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 6275 transitions. Word has length 77 [2021-11-20 07:22:16,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:16,730 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 6275 transitions. [2021-11-20 07:22:16,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 6275 transitions. [2021-11-20 07:22:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:22:16,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:16,737 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:16,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:22:16,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:22:16,950 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:16,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:16,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504456, now seen corresponding path program 2 times [2021-11-20 07:22:16,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:22:16,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18431365] [2021-11-20 07:22:16,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:22:16,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:22:16,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:22:16,952 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:22:16,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 07:22:17,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:22:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:22:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:22:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:22:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:22,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:22:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:28,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:22:28,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18431365] [2021-11-20 07:22:28,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18431365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:22:28,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:22:28,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-20 07:22:28,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501900280] [2021-11-20 07:22:28,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:22:28,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:22:28,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:22:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:22:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2268, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:22:28,541 INFO L87 Difference]: Start difference. First operand 4353 states and 6275 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:24:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:24:43,735 INFO L93 Difference]: Finished difference Result 10347 states and 14360 transitions. [2021-11-20 07:24:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-11-20 07:24:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 07:24:43,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:24:43,756 INFO L225 Difference]: With dead ends: 10347 [2021-11-20 07:24:43,756 INFO L226 Difference]: Without dead ends: 9534 [2021-11-20 07:24:43,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38412 ImplicationChecksByTransitivity, 118.8s TimeCoverageRelationStatistics Valid=11891, Invalid=95365, Unknown=0, NotChecked=0, Total=107256 [2021-11-20 07:24:43,767 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 2749 mSDsluCounter, 17544 mSDsCounter, 0 mSdLazyCounter, 10835 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 18296 SdHoareTripleChecker+Invalid, 11589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 10835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:24:43,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 18296 Invalid, 11589 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [754 Valid, 10835 Invalid, 0 Unknown, 0 Unchecked, 20.8s Time] [2021-11-20 07:24:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2021-11-20 07:24:44,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 6117. [2021-11-20 07:24:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 6116 states have (on average 1.4529103989535643) internal successors, (8886), 6116 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:24:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 8886 transitions. [2021-11-20 07:24:44,383 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 8886 transitions. Word has length 77 [2021-11-20 07:24:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:24:44,384 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 8886 transitions. [2021-11-20 07:24:44,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:24:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 8886 transitions. [2021-11-20 07:24:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:24:44,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:24:44,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:24:44,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:24:44,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:24:44,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:24:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:24:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -652353288, now seen corresponding path program 3 times [2021-11-20 07:24:44,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:24:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692352314] [2021-11-20 07:24:44,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:24:44,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:24:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:24:44,611 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:24:44,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 07:24:44,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:24:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:24:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:24:44,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:24:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:24:49,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:24:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:24:55,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:24:55,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692352314] [2021-11-20 07:24:55,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692352314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:24:55,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:24:55,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-20 07:24:55,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865414955] [2021-11-20 07:24:55,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:24:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:24:55,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:24:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:24:55,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:24:55,193 INFO L87 Difference]: Start difference. First operand 6117 states and 8886 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:23,431 INFO L93 Difference]: Finished difference Result 13384 states and 18917 transitions. [2021-11-20 07:26:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-20 07:26:23,432 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 07:26:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:23,452 INFO L225 Difference]: With dead ends: 13384 [2021-11-20 07:26:23,453 INFO L226 Difference]: Without dead ends: 10813 [2021-11-20 07:26:23,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19875 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=9162, Invalid=52094, Unknown=0, NotChecked=0, Total=61256 [2021-11-20 07:26:23,461 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 2685 mSDsluCounter, 15637 mSDsCounter, 0 mSdLazyCounter, 9241 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 16307 SdHoareTripleChecker+Invalid, 9921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 9241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:23,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2685 Valid, 16307 Invalid, 9921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [680 Valid, 9241 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2021-11-20 07:26:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10813 states. [2021-11-20 07:26:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10813 to 7443. [2021-11-20 07:26:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 1.4545821015855953) internal successors, (10825), 7442 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 10825 transitions. [2021-11-20 07:26:24,054 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 10825 transitions. Word has length 77 [2021-11-20 07:26:24,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:24,054 INFO L470 AbstractCegarLoop]: Abstraction has 7443 states and 10825 transitions. [2021-11-20 07:26:24,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 10825 transitions. [2021-11-20 07:26:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 07:26:24,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:24,064 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:24,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:24,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:26:24,275 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -305352451, now seen corresponding path program 1 times [2021-11-20 07:26:24,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:26:24,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057999706] [2021-11-20 07:26:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:24,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:26:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:26:24,277 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:26:24,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 07:26:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:26:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 59 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:25,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:26,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:26:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057999706] [2021-11-20 07:26:26,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057999706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:26,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:26,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-20 07:26:26,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232769691] [2021-11-20 07:26:26,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:26,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:26:26,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:26:26,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:26:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:26:26,313 INFO L87 Difference]: Start difference. First operand 7443 states and 10825 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:26:27,592 INFO L93 Difference]: Finished difference Result 11717 states and 16829 transitions. [2021-11-20 07:26:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:26:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-20 07:26:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:26:27,605 INFO L225 Difference]: With dead ends: 11717 [2021-11-20 07:26:27,606 INFO L226 Difference]: Without dead ends: 8256 [2021-11-20 07:26:27,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:26:27,611 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 436 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:26:27,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 362 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 805 Invalid, 0 Unknown, 490 Unchecked, 0.5s Time] [2021-11-20 07:26:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2021-11-20 07:26:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 7981. [2021-11-20 07:26:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 1.4444862155388472) internal successors, (11527), 7980 states have internal predecessors, (11527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11527 transitions. [2021-11-20 07:26:28,199 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11527 transitions. Word has length 79 [2021-11-20 07:26:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:26:28,199 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 11527 transitions. [2021-11-20 07:26:28,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:26:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11527 transitions. [2021-11-20 07:26:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 07:26:28,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:26:28,208 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:26:28,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:26:28,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:26:28,419 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:26:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:26:28,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-11-20 07:26:28,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:26:28,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697942625] [2021-11-20 07:26:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:26:28,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:26:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:26:28,421 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:26:28,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 07:26:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:26:28,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-20 07:26:28,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:26:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:26:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:26:39,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:26:39,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697942625] [2021-11-20 07:26:39,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697942625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:26:39,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:26:39,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-20 07:26:39,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147596329] [2021-11-20 07:26:39,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:26:39,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:26:39,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:26:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:26:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:26:39,219 INFO L87 Difference]: Start difference. First operand 7981 states and 11527 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:23,117 INFO L93 Difference]: Finished difference Result 14067 states and 19509 transitions. [2021-11-20 07:29:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 333 states. [2021-11-20 07:29:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-20 07:29:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:23,135 INFO L225 Difference]: With dead ends: 14067 [2021-11-20 07:29:23,135 INFO L226 Difference]: Without dead ends: 13851 [2021-11-20 07:29:23,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55356 ImplicationChecksByTransitivity, 146.7s TimeCoverageRelationStatistics Valid=15661, Invalid=127601, Unknown=0, NotChecked=0, Total=143262 [2021-11-20 07:29:23,147 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 3653 mSDsluCounter, 20149 mSDsCounter, 0 mSdLazyCounter, 12607 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3653 SdHoareTripleChecker+Valid, 20919 SdHoareTripleChecker+Invalid, 13899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 12607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:23,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3653 Valid, 20919 Invalid, 13899 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1292 Valid, 12607 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2021-11-20 07:29:23,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13851 states. [2021-11-20 07:29:23,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13851 to 9508. [2021-11-20 07:29:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 9507 states have (on average 1.447880509098559) internal successors, (13765), 9507 states have internal predecessors, (13765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 13765 transitions. [2021-11-20 07:29:23,753 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 13765 transitions. Word has length 80 [2021-11-20 07:29:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:23,754 INFO L470 AbstractCegarLoop]: Abstraction has 9508 states and 13765 transitions. [2021-11-20 07:29:23,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:29:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 13765 transitions. [2021-11-20 07:29:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-20 07:29:23,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:23,762 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:23,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:23,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:23,973 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:23,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-11-20 07:29:23,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:23,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693182406] [2021-11-20 07:29:23,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:23,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:23,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:23,975 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:23,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_371d8291-12ed-4f64-8e30-32ca1984aa3d/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 07:29:24,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:24,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:29:24,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:28,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:33,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693182406] [2021-11-20 07:29:33,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693182406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:33,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:33,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-20 07:29:33,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078374438] [2021-11-20 07:29:33,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:33,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-20 07:29:33,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-20 07:29:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:29:33,984 INFO L87 Difference]: Start difference. First operand 9508 states and 13765 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)