./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU --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 6f396832a7fd6adfd59ab9c94f7793bcfe6b37193013b9655a845b3ca447ca9b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:59:10,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:59:10,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:59:10,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:59:10,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:59:10,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:59:10,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:59:10,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:59:10,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:59:10,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:59:10,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:59:10,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:59:10,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:59:10,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:59:10,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:59:10,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:59:10,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:59:10,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:59:10,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:59:10,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:59:10,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:59:10,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:59:10,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:59:10,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:59:10,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:59:10,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:59:10,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:59:10,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:59:10,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:59:10,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:59:10,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:59:10,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:59:10,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:59:10,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:59:10,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:59:10,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:59:10,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:59:10,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:59:10,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:59:10,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:59:10,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:59:10,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:59:10,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:59:10,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:59:10,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:59:10,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:59:10,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:59:10,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:59:10,328 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:59:10,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:59:10,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:59:10,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:59:10,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:59:10,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:59:10,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:59:10,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:59:10,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:59:10,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:59:10,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:59:10,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:59:10,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:59:10,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:59:10,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:59:10,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:59:10,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:59:10,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:59:10,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:59:10,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:59:10,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:59:10,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:59:10,334 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:59:10,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:59:10,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:59:10,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:59:10,336 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_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f396832a7fd6adfd59ab9c94f7793bcfe6b37193013b9655a845b3ca447ca9b [2021-11-02 22:59:10,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:59:10,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:59:10,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:59:10,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:59:10,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:59:10,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-02 22:59:10,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/1c6b8a509/1ed6e6cba97047a1944b8551658d835c/FLAG77007ffd4 [2021-11-02 22:59:11,427 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:59:11,428 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-02 22:59:11,437 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/1c6b8a509/1ed6e6cba97047a1944b8551658d835c/FLAG77007ffd4 [2021-11-02 22:59:11,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/1c6b8a509/1ed6e6cba97047a1944b8551658d835c [2021-11-02 22:59:11,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:59:11,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:59:11,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:59:11,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:59:11,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:59:11,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:59:11" (1/1) ... [2021-11-02 22:59:11,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95aac3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:11, skipping insertion in model container [2021-11-02 22:59:11,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:59:11" (1/1) ... [2021-11-02 22:59:11,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:59:11,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:59:12,016 WARN L228 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_b31b8470-9fcc-44a3-be68-21f855fff40e/sv-benchmarks/c/bitvector/byte_add_2-2.i[863,876] [2021-11-02 22:59:12,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:59:12,076 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:59:12,090 WARN L228 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_b31b8470-9fcc-44a3-be68-21f855fff40e/sv-benchmarks/c/bitvector/byte_add_2-2.i[863,876] [2021-11-02 22:59:12,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:59:12,148 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:59:12,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12 WrapperNode [2021-11-02 22:59:12,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:59:12,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:59:12,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:59:12,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:59:12,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:59:12,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:59:12,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:59:12,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:59:12,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:59:12,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:59:12,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:59:12,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:59:12,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (1/1) ... [2021-11-02 22:59:12,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:59:12,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:12,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:59:12,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:59:12,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:59:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:59:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:59:12,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:59:12,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:59:12,836 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:59:12,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:59:12 BoogieIcfgContainer [2021-11-02 22:59:12,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:59:12,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:59:12,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:59:12,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:59:12,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:59:11" (1/3) ... [2021-11-02 22:59:12,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5b35c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:59:12, skipping insertion in model container [2021-11-02 22:59:12,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:12" (2/3) ... [2021-11-02 22:59:12,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5b35c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:59:12, skipping insertion in model container [2021-11-02 22:59:12,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:59:12" (3/3) ... [2021-11-02 22:59:12,849 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-11-02 22:59:12,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:59:12,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:59:12,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:59:12,942 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 [2021-11-02 22:59:12,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:59:12,961 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) [2021-11-02 22:59:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:59:12,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:12,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:12,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-02 22:59:13,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:13,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183812350] [2021-11-02 22:59:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:13,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:13,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:13,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183812350] [2021-11-02 22:59:13,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183812350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:13,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:13,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:59:13,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213971279] [2021-11-02 22:59:13,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:59:13,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:13,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:59:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:59:13,261 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) [2021-11-02 22:59:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:13,284 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-02 22:59:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:59:13,286 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 [2021-11-02 22:59:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:13,298 INFO L225 Difference]: With dead ends: 57 [2021-11-02 22:59:13,298 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 22:59:13,302 INFO L786 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 [2021-11-02 22:59:13,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 22:59:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 22:59:13,342 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) [2021-11-02 22:59:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-02 22:59:13,346 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-02 22:59:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:13,347 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-02 22:59:13,347 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) [2021-11-02 22:59:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-02 22:59:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:59:13,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:13,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:13,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:59:13,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-02 22:59:13,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:13,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000137892] [2021-11-02 22:59:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:13,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:13,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:13,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000137892] [2021-11-02 22:59:13,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000137892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:13,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:13,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:59:13,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220467285] [2021-11-02 22:59:13,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:59:13,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:59:13,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:59:13,570 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) [2021-11-02 22:59:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:13,746 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-11-02 22:59:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:59:13,747 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 [2021-11-02 22:59:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:13,749 INFO L225 Difference]: With dead ends: 89 [2021-11-02 22:59:13,750 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 22:59:13,751 INFO L786 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 [2021-11-02 22:59:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 22:59:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-02 22:59:13,761 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) [2021-11-02 22:59:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-11-02 22:59:13,763 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-11-02 22:59:13,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:13,764 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-11-02 22:59:13,765 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) [2021-11-02 22:59:13,765 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-11-02 22:59:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:59:13,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:13,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:13,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:59:13,768 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-11-02 22:59:13,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:13,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283081117] [2021-11-02 22:59:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:13,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:59:13,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:13,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283081117] [2021-11-02 22:59:13,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283081117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:13,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:13,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:59:13,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394738166] [2021-11-02 22:59:13,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:13,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:13,939 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) [2021-11-02 22:59:14,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:14,202 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-11-02 22:59:14,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:59:14,204 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 [2021-11-02 22:59:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:14,206 INFO L225 Difference]: With dead ends: 143 [2021-11-02 22:59:14,206 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:59:14,207 INFO L786 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 [2021-11-02 22:59:14,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:59:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-11-02 22:59:14,216 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) [2021-11-02 22:59:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-11-02 22:59:14,217 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-11-02 22:59:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:14,218 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-11-02 22:59:14,218 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) [2021-11-02 22:59:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-11-02 22:59:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:59:14,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:14,220 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:14,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:59:14,221 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-11-02 22:59:14,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:14,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430394041] [2021-11-02 22:59:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:14,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:59:14,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:14,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430394041] [2021-11-02 22:59:14,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430394041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:14,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:14,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:59:14,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499030100] [2021-11-02 22:59:14,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:59:14,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:59:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:59:14,336 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-11-02 22:59:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:14,344 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2021-11-02 22:59:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:59:14,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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 [2021-11-02 22:59:14,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:14,346 INFO L225 Difference]: With dead ends: 104 [2021-11-02 22:59:14,346 INFO L226 Difference]: Without dead ends: 52 [2021-11-02 22:59:14,347 INFO L786 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 [2021-11-02 22:59:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-02 22:59:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-02 22:59:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 51 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 77 transitions. [2021-11-02 22:59:14,359 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 77 transitions. Word has length 19 [2021-11-02 22:59:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:14,359 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 77 transitions. [2021-11-02 22:59:14,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2021-11-02 22:59:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 77 transitions. [2021-11-02 22:59:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:59:14,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:14,363 INFO L513 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] [2021-11-02 22:59:14,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:59:14,364 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:14,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-11-02 22:59:14,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:14,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675602866] [2021-11-02 22:59:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:14,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:14,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:14,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675602866] [2021-11-02 22:59:14,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675602866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:14,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:14,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:59:14,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4261874] [2021-11-02 22:59:14,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:59:14,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:59:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:59:14,520 INFO L87 Difference]: Start difference. First operand 52 states and 77 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:14,542 INFO L93 Difference]: Finished difference Result 73 states and 107 transitions. [2021-11-02 22:59:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:59:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 22:59:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:14,547 INFO L225 Difference]: With dead ends: 73 [2021-11-02 22:59:14,547 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 22:59:14,548 INFO L786 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 [2021-11-02 22:59:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 22:59:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-02 22:59:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2021-11-02 22:59:14,572 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 25 [2021-11-02 22:59:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:14,574 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2021-11-02 22:59:14,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2021-11-02 22:59:14,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:59:14,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:14,577 INFO L513 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] [2021-11-02 22:59:14,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:59:14,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:14,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1738293938, now seen corresponding path program 1 times [2021-11-02 22:59:14,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:14,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101792598] [2021-11-02 22:59:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:14,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:14,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:14,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101792598] [2021-11-02 22:59:14,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101792598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:14,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:14,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:59:14,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379183839] [2021-11-02 22:59:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:14,926 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:15,211 INFO L93 Difference]: Finished difference Result 169 states and 249 transitions. [2021-11-02 22:59:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:59:15,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 22:59:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:15,214 INFO L225 Difference]: With dead ends: 169 [2021-11-02 22:59:15,214 INFO L226 Difference]: Without dead ends: 121 [2021-11-02 22:59:15,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:59:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-02 22:59:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 67. [2021-11-02 22:59:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2021-11-02 22:59:15,232 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 25 [2021-11-02 22:59:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:15,232 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2021-11-02 22:59:15,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2021-11-02 22:59:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:59:15,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:15,234 INFO L513 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] [2021-11-02 22:59:15,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:59:15,235 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1125876944, now seen corresponding path program 1 times [2021-11-02 22:59:15,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:15,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041409157] [2021-11-02 22:59:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:15,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:15,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:15,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041409157] [2021-11-02 22:59:15,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041409157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:15,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274708659] [2021-11-02 22:59:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:15,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:15,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:15,363 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:15,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:59:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:59:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:15,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274708659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:15,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:15,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-02 22:59:15,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109783422] [2021-11-02 22:59:15,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:15,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:59:15,704 INFO L87 Difference]: Start difference. First operand 67 states and 96 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) [2021-11-02 22:59:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:15,982 INFO L93 Difference]: Finished difference Result 153 states and 251 transitions. [2021-11-02 22:59:15,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:59:15,983 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 [2021-11-02 22:59:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:15,985 INFO L225 Difference]: With dead ends: 153 [2021-11-02 22:59:15,985 INFO L226 Difference]: Without dead ends: 119 [2021-11-02 22:59:15,986 INFO L786 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 [2021-11-02 22:59:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-02 22:59:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-11-02 22:59:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 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) [2021-11-02 22:59:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2021-11-02 22:59:15,997 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 26 [2021-11-02 22:59:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:15,998 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2021-11-02 22:59:15,998 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) [2021-11-02 22:59:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2021-11-02 22:59:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:59:16,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:16,000 INFO L513 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] [2021-11-02 22:59:16,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:16,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:59:16,205 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:16,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash 801426209, now seen corresponding path program 1 times [2021-11-02 22:59:16,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:16,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912037538] [2021-11-02 22:59:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:16,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:16,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:16,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912037538] [2021-11-02 22:59:16,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912037538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:16,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488480672] [2021-11-02 22:59:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:16,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:16,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:16,478 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:16,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:59:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:59:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:59:16,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488480672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:16,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:16,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-02 22:59:16,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778653343] [2021-11-02 22:59:16,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:59:16,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:59:16,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:59:16,991 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2021-11-02 22:59:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:17,147 INFO L93 Difference]: Finished difference Result 193 states and 267 transitions. [2021-11-02 22:59:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:59:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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 [2021-11-02 22:59:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:17,149 INFO L225 Difference]: With dead ends: 193 [2021-11-02 22:59:17,149 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:59:17,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:59:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:59:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2021-11-02 22:59:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3488372093023255) internal successors, (116), 86 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2021-11-02 22:59:17,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 32 [2021-11-02 22:59:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:17,170 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2021-11-02 22:59:17,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2021-11-02 22:59:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2021-11-02 22:59:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:59:17,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:17,175 INFO L513 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] [2021-11-02 22:59:17,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:59:17,402 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 763937393, now seen corresponding path program 1 times [2021-11-02 22:59:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:17,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117997941] [2021-11-02 22:59:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:17,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:59:17,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:17,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117997941] [2021-11-02 22:59:17,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117997941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:17,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:17,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:59:17,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216045196] [2021-11-02 22:59:17,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:17,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:17,538 INFO L87 Difference]: Start difference. First operand 87 states and 116 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) [2021-11-02 22:59:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:17,765 INFO L93 Difference]: Finished difference Result 253 states and 361 transitions. [2021-11-02 22:59:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:59:17,766 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 39 [2021-11-02 22:59:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:17,768 INFO L225 Difference]: With dead ends: 253 [2021-11-02 22:59:17,768 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 22:59:17,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:59:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 22:59:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 121. [2021-11-02 22:59:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 171 transitions. [2021-11-02 22:59:17,782 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 171 transitions. Word has length 39 [2021-11-02 22:59:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:17,782 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 171 transitions. [2021-11-02 22:59:17,783 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) [2021-11-02 22:59:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 171 transitions. [2021-11-02 22:59:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:59:17,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:17,786 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:59:17,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:59:17,787 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1940214352, now seen corresponding path program 1 times [2021-11-02 22:59:17,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:17,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874918885] [2021-11-02 22:59:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:17,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:59:17,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:17,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874918885] [2021-11-02 22:59:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874918885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:17,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:17,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:59:17,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173631621] [2021-11-02 22:59:17,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:17,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:17,908 INFO L87 Difference]: Start difference. First operand 121 states and 171 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:18,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:18,135 INFO L93 Difference]: Finished difference Result 342 states and 498 transitions. [2021-11-02 22:59:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:59:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 22:59:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:18,138 INFO L225 Difference]: With dead ends: 342 [2021-11-02 22:59:18,138 INFO L226 Difference]: Without dead ends: 236 [2021-11-02 22:59:18,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:59:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-02 22:59:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 155. [2021-11-02 22:59:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 229 transitions. [2021-11-02 22:59:18,152 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 229 transitions. Word has length 52 [2021-11-02 22:59:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:18,153 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 229 transitions. [2021-11-02 22:59:18,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 229 transitions. [2021-11-02 22:59:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:59:18,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:18,156 INFO L513 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] [2021-11-02 22:59:18,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:59:18,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:18,158 INFO L85 PathProgramCache]: Analyzing trace with hash -564670639, now seen corresponding path program 1 times [2021-11-02 22:59:18,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:18,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375479253] [2021-11-02 22:59:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:18,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:59:18,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:18,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375479253] [2021-11-02 22:59:18,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375479253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:18,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:18,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:59:18,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932224164] [2021-11-02 22:59:18,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:59:18,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:18,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:59:18,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:59:18,321 INFO L87 Difference]: Start difference. First operand 155 states and 229 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) [2021-11-02 22:59:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:18,687 INFO L93 Difference]: Finished difference Result 607 states and 894 transitions. [2021-11-02 22:59:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:59:18,688 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 65 [2021-11-02 22:59:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:18,692 INFO L225 Difference]: With dead ends: 607 [2021-11-02 22:59:18,692 INFO L226 Difference]: Without dead ends: 468 [2021-11-02 22:59:18,693 INFO L786 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 [2021-11-02 22:59:18,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-02 22:59:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 155. [2021-11-02 22:59:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.4870129870129871) internal successors, (229), 154 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 229 transitions. [2021-11-02 22:59:18,705 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 229 transitions. Word has length 65 [2021-11-02 22:59:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:18,705 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 229 transitions. [2021-11-02 22:59:18,705 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) [2021-11-02 22:59:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 229 transitions. [2021-11-02 22:59:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:59:18,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:18,707 INFO L513 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] [2021-11-02 22:59:18,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:59:18,707 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:18,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1543642426, now seen corresponding path program 1 times [2021-11-02 22:59:18,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:18,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052691527] [2021-11-02 22:59:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:18,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 22:59:18,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:18,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052691527] [2021-11-02 22:59:18,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052691527] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:18,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:18,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:59:18,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969367460] [2021-11-02 22:59:18,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:59:18,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:59:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:59:18,883 INFO L87 Difference]: Start difference. First operand 155 states and 229 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) [2021-11-02 22:59:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:19,004 INFO L93 Difference]: Finished difference Result 503 states and 745 transitions. [2021-11-02 22:59:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:59:19,005 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 [2021-11-02 22:59:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:19,009 INFO L225 Difference]: With dead ends: 503 [2021-11-02 22:59:19,010 INFO L226 Difference]: Without dead ends: 364 [2021-11-02 22:59:19,010 INFO L786 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 [2021-11-02 22:59:19,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-02 22:59:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 269. [2021-11-02 22:59:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.5037313432835822) internal successors, (403), 268 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 403 transitions. [2021-11-02 22:59:19,024 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 403 transitions. Word has length 66 [2021-11-02 22:59:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:19,025 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 403 transitions. [2021-11-02 22:59:19,025 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) [2021-11-02 22:59:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 403 transitions. [2021-11-02 22:59:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:59:19,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:19,027 INFO L513 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] [2021-11-02 22:59:19,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:59:19,028 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1373754372, now seen corresponding path program 1 times [2021-11-02 22:59:19,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:19,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210868165] [2021-11-02 22:59:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:19,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-02 22:59:19,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:19,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210868165] [2021-11-02 22:59:19,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210868165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:19,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:19,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:59:19,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911516071] [2021-11-02 22:59:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:59:19,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:59:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:59:19,257 INFO L87 Difference]: Start difference. First operand 269 states and 403 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-11-02 22:59:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:20,013 INFO L93 Difference]: Finished difference Result 1362 states and 2021 transitions. [2021-11-02 22:59:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:59:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 66 [2021-11-02 22:59:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:20,023 INFO L225 Difference]: With dead ends: 1362 [2021-11-02 22:59:20,023 INFO L226 Difference]: Without dead ends: 1109 [2021-11-02 22:59:20,024 INFO L786 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 [2021-11-02 22:59:20,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-11-02 22:59:20,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 262. [2021-11-02 22:59:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.5134099616858236) internal successors, (395), 261 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 395 transitions. [2021-11-02 22:59:20,048 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 395 transitions. Word has length 66 [2021-11-02 22:59:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:20,049 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 395 transitions. [2021-11-02 22:59:20,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-11-02 22:59:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 395 transitions. [2021-11-02 22:59:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-02 22:59:20,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:20,051 INFO L513 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] [2021-11-02 22:59:20,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:59:20,052 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1708732925, now seen corresponding path program 1 times [2021-11-02 22:59:20,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:20,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122256626] [2021-11-02 22:59:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:20,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-02 22:59:20,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:20,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122256626] [2021-11-02 22:59:20,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122256626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:20,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196776176] [2021-11-02 22:59:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:20,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:20,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:20,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:20,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:59:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:59:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-02 22:59:20,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196776176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:20,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:20,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-02 22:59:20,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546368363] [2021-11-02 22:59:20,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:59:20,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:59:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:59:20,717 INFO L87 Difference]: Start difference. First operand 262 states and 395 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:21,012 INFO L93 Difference]: Finished difference Result 846 states and 1280 transitions. [2021-11-02 22:59:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:59:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-02 22:59:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:21,018 INFO L225 Difference]: With dead ends: 846 [2021-11-02 22:59:21,018 INFO L226 Difference]: Without dead ends: 589 [2021-11-02 22:59:21,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:59:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-02 22:59:21,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 516. [2021-11-02 22:59:21,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.5009708737864078) internal successors, (773), 515 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 773 transitions. [2021-11-02 22:59:21,057 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 773 transitions. Word has length 68 [2021-11-02 22:59:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:21,057 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 773 transitions. [2021-11-02 22:59:21,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 773 transitions. [2021-11-02 22:59:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:59:21,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:21,060 INFO L513 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] [2021-11-02 22:59:21,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:21,280 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1866953413, now seen corresponding path program 1 times [2021-11-02 22:59:21,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:21,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084282590] [2021-11-02 22:59:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:21,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-02 22:59:21,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:21,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084282590] [2021-11-02 22:59:21,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084282590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:21,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188714542] [2021-11-02 22:59:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:21,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:21,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:21,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:21,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:59:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:59:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-02 22:59:22,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188714542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:22,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:22,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-11-02 22:59:22,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527081206] [2021-11-02 22:59:22,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:59:22,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:59:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:59:22,550 INFO L87 Difference]: Start difference. First operand 516 states and 773 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:23,122 INFO L93 Difference]: Finished difference Result 1474 states and 2200 transitions. [2021-11-02 22:59:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:59:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 22:59:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:23,132 INFO L225 Difference]: With dead ends: 1474 [2021-11-02 22:59:23,132 INFO L226 Difference]: Without dead ends: 969 [2021-11-02 22:59:23,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:59:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-02 22:59:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 803. [2021-11-02 22:59:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.4351620947630923) internal successors, (1151), 802 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1151 transitions. [2021-11-02 22:59:23,183 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1151 transitions. Word has length 69 [2021-11-02 22:59:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1151 transitions. [2021-11-02 22:59:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1151 transitions. [2021-11-02 22:59:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:59:23,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:23,195 INFO L513 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] [2021-11-02 22:59:23,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-02 22:59:23,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:59:23,400 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2021-11-02 22:59:23,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:23,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475173855] [2021-11-02 22:59:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:23,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:59:23,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:23,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475173855] [2021-11-02 22:59:23,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475173855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:23,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265317033] [2021-11-02 22:59:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:23,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:23,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:23,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:23,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:59:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:59:24,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:59:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265317033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:24,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:24,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 22:59:24,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035797870] [2021-11-02 22:59:24,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:59:24,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:59:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:59:24,935 INFO L87 Difference]: Start difference. First operand 803 states and 1151 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:25,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:25,162 INFO L93 Difference]: Finished difference Result 1776 states and 2529 transitions. [2021-11-02 22:59:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:59:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-02 22:59:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:25,171 INFO L225 Difference]: With dead ends: 1776 [2021-11-02 22:59:25,172 INFO L226 Difference]: Without dead ends: 996 [2021-11-02 22:59:25,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:59:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-02 22:59:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 751. [2021-11-02 22:59:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.4493333333333334) internal successors, (1087), 750 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1087 transitions. [2021-11-02 22:59:25,218 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1087 transitions. Word has length 70 [2021-11-02 22:59:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:25,218 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1087 transitions. [2021-11-02 22:59:25,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1087 transitions. [2021-11-02 22:59:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:59:25,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:25,222 INFO L513 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] [2021-11-02 22:59:25,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:25,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:59:25,429 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-11-02 22:59:25,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:25,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33788288] [2021-11-02 22:59:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:25,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:59:25,550 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:59:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:59:25,681 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:59:25,681 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:59:25,683 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:59:25,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:59:25,693 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:25,698 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:59:25,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:59:25 BoogieIcfgContainer [2021-11-02 22:59:25,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:59:25,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:59:25,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:59:25,847 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:59:25,848 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:59:12" (3/4) ... [2021-11-02 22:59:25,852 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:59:25,852 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:59:25,854 INFO L168 Benchmark]: Toolchain (without parser) took 14084.77 ms. Allocated memory was 96.5 MB in the beginning and 161.5 MB in the end (delta: 65.0 MB). Free memory was 62.5 MB in the beginning and 66.0 MB in the end (delta: -3.5 MB). Peak memory consumption was 63.6 MB. Max. memory is 16.1 GB. [2021-11-02 22:59:25,855 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory was 70.0 MB in the beginning and 70.0 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:59:25,856 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.12 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 70.2 MB in the end (delta: -7.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:59:25,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.68 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 68.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:59:25,857 INFO L168 Benchmark]: Boogie Preprocessor took 53.23 ms. Allocated memory is still 96.5 MB. Free memory was 68.3 MB in the beginning and 67.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:59:25,858 INFO L168 Benchmark]: RCFGBuilder took 578.29 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 54.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-02 22:59:25,858 INFO L168 Benchmark]: TraceAbstraction took 13005.07 ms. Allocated memory was 96.5 MB in the beginning and 161.5 MB in the end (delta: 65.0 MB). Free memory was 54.1 MB in the beginning and 66.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 56.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:59:25,859 INFO L168 Benchmark]: Witness Printer took 6.16 ms. Allocated memory is still 161.5 MB. Free memory is still 66.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:59:25,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory was 70.0 MB in the beginning and 70.0 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 381.12 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 70.2 MB in the end (delta: -7.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.68 ms. Allocated memory is still 96.5 MB. Free memory was 70.2 MB in the beginning and 68.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.23 ms. Allocated memory is still 96.5 MB. Free memory was 68.3 MB in the beginning and 67.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 578.29 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 54.7 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13005.07 ms. Allocated memory was 96.5 MB in the beginning and 161.5 MB in the end (delta: 65.0 MB). Free memory was 54.1 MB in the beginning and 66.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 56.1 MB. Max. memory is 16.1 GB. * Witness Printer took 6.16 ms. Allocated memory is still 161.5 MB. Free memory is still 66.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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: 17]: 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 108, overapproximation of bitwiseAnd at line 88. Possible FailurePath: [L116] unsigned int a, b, r; [L117] a = __VERIFIER_nondet_uint() [L119] b = 234770789 [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND TRUE a3 == (unsigned char)0 [L52] na = na - 1 [L53] COND TRUE a2 == (unsigned char)0 [L54] na = na - 1 [L55] COND TRUE a1 == (unsigned char)0 [L56] na = na - 1 [L60] nb = (unsigned char)4 [L61] COND FALSE !(b3 == (unsigned char)0) [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND TRUE partial_sum > ((unsigned char)255) [L88] partial_sum = partial_sum & ((unsigned char)255) [L89] carry = (unsigned short)1 [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND FALSE !(i < na) [L81] COND TRUE i < nb [L82] COND FALSE !(i == (unsigned char)0) [L83] COND TRUE i == (unsigned char)1 [L83] partial_sum = partial_sum + b1 [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND TRUE i == (unsigned char)1 [L92] r1 = (unsigned char)partial_sum [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND FALSE !(i < na) [L81] COND TRUE i < nb [L82] COND FALSE !(i == (unsigned char)0) [L83] COND FALSE !(i == (unsigned char)1) [L84] COND TRUE i == (unsigned char)2 [L84] partial_sum = partial_sum + b2 [L85] COND FALSE !(i == (unsigned char)3) [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND FALSE !(i == (unsigned char)1) [L93] COND TRUE i == (unsigned char)2 [L93] r2 = (unsigned char)partial_sum [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND FALSE !(i < na) [L81] COND TRUE i < nb [L82] COND FALSE !(i == (unsigned char)0) [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND TRUE i == (unsigned char)3 [L85] partial_sum = partial_sum + b3 [L87] COND FALSE !(partial_sum > ((unsigned char)255)) [L91] COND FALSE !(i == (unsigned char)0) [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND TRUE i == (unsigned char)3 [L94] r3 = (unsigned char)partial_sum [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L121] r = mp_add(a, b) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.7s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 879 SDtfs, 1481 SDslu, 1284 SDs, 0 SdLazy, 2078 SolverSat, 188 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 376 GetRequests, 300 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=803occurred in iteration=15, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 2007 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 999 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 908 ConstructedInterpolants, 0 QuantifiedInterpolants, 3589 SizeOfPredicates, 12 NumberOfNonLiveVariables, 803 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 21 InterpolantComputations, 13 PerfectInterpolantSequences, 783/805 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 [2021-11-02 22:59:25,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/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_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU --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 6f396832a7fd6adfd59ab9c94f7793bcfe6b37193013b9655a845b3ca447ca9b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:59:28,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:59:28,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:59:29,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:59:29,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:59:29,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:59:29,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:59:29,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:59:29,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:59:29,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:59:29,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:59:29,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:59:29,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:59:29,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:59:29,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:59:29,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:59:29,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:59:29,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:59:29,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:59:29,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:59:29,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:59:29,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:59:29,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:59:29,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:59:29,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:59:29,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:59:29,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:59:29,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:59:29,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:59:29,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:59:29,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:59:29,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:59:29,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:59:29,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:59:29,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:59:29,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:59:29,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:59:29,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:59:29,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:59:29,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:59:29,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:59:29,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-02 22:59:29,211 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:59:29,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:59:29,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:59:29,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:59:29,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:59:29,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:59:29,216 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:59:29,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:59:29,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:59:29,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:59:29,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:59:29,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:59:29,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:59:29,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:59:29,219 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:59:29,219 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:59:29,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:59:29,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:59:29,220 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:59:29,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:59:29,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:59:29,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:59:29,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:59:29,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:59:29,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:59:29,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:59:29,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:59:29,221 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:59:29,221 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:59:29,222 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:59:29,222 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:59:29,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:59:29,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:59:29,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:59:29,222 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_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f396832a7fd6adfd59ab9c94f7793bcfe6b37193013b9655a845b3ca447ca9b [2021-11-02 22:59:29,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:59:29,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:59:29,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:59:29,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:59:29,782 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:59:29,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-02 22:59:29,879 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/304ac1b16/2a0da435e7594e55bb7117c3f8e0b0b5/FLAGfec51fd8d [2021-11-02 22:59:30,677 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:59:30,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-11-02 22:59:30,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/304ac1b16/2a0da435e7594e55bb7117c3f8e0b0b5/FLAGfec51fd8d [2021-11-02 22:59:30,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/data/304ac1b16/2a0da435e7594e55bb7117c3f8e0b0b5 [2021-11-02 22:59:30,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:59:30,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:59:30,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:59:30,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:59:31,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:59:31,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:59:30" (1/1) ... [2021-11-02 22:59:31,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4337eec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31, skipping insertion in model container [2021-11-02 22:59:31,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:59:30" (1/1) ... [2021-11-02 22:59:31,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:59:31,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:59:31,245 WARN L228 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_b31b8470-9fcc-44a3-be68-21f855fff40e/sv-benchmarks/c/bitvector/byte_add_2-2.i[863,876] [2021-11-02 22:59:31,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:59:31,310 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:59:31,353 WARN L228 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_b31b8470-9fcc-44a3-be68-21f855fff40e/sv-benchmarks/c/bitvector/byte_add_2-2.i[863,876] [2021-11-02 22:59:31,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:59:31,443 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:59:31,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31 WrapperNode [2021-11-02 22:59:31,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:59:31,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:59:31,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:59:31,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:59:31,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:59:31,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:59:31,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:59:31,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:59:31,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:59:31,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:59:31,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:59:31,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:59:31,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (1/1) ... [2021-11-02 22:59:31,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:59:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:31,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:59:31,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:59:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:59:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:59:31,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:59:31,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:59:32,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:59:32,063 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-02 22:59:32,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:59:32 BoogieIcfgContainer [2021-11-02 22:59:32,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:59:32,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:59:32,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:59:32,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:59:32,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:59:30" (1/3) ... [2021-11-02 22:59:32,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138e70be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:59:32, skipping insertion in model container [2021-11-02 22:59:32,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:59:31" (2/3) ... [2021-11-02 22:59:32,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138e70be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:59:32, skipping insertion in model container [2021-11-02 22:59:32,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:59:32" (3/3) ... [2021-11-02 22:59:32,077 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-11-02 22:59:32,084 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:59:32,090 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:59:32,194 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:59:32,206 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 [2021-11-02 22:59:32,206 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:59:32,235 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) [2021-11-02 22:59:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:59:32,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:32,260 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:32,261 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-02 22:59:32,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:32,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785605932] [2021-11-02 22:59:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:32,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:32,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:32,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:59:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:59:32,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:32,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:32,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:32,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785605932] [2021-11-02 22:59:32,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785605932] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:32,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:32,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:59:32,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408532420] [2021-11-02 22:59:32,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:59:32,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:59:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:59:32,643 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) [2021-11-02 22:59:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:32,670 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-02 22:59:32,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:59:32,673 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 [2021-11-02 22:59:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:32,687 INFO L225 Difference]: With dead ends: 57 [2021-11-02 22:59:32,688 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 22:59:32,697 INFO L786 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 [2021-11-02 22:59:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 22:59:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 22:59:32,748 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) [2021-11-02 22:59:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-02 22:59:32,753 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-02 22:59:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:32,754 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-02 22:59:32,754 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) [2021-11-02 22:59:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-02 22:59:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:59:32,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:32,758 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:32,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:32,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:32,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:32,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:32,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-02 22:59:32,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:32,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932955807] [2021-11-02 22:59:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:32,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:32,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:32,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:32,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:59:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:59:33,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:33,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:33,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:33,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932955807] [2021-11-02 22:59:33,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932955807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:33,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:33,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:59:33,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539199710] [2021-11-02 22:59:33,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:59:33,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:59:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:59:33,324 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-02 22:59:33,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:33,900 INFO L93 Difference]: Finished difference Result 180 states and 315 transitions. [2021-11-02 22:59:33,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:59:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 12 [2021-11-02 22:59:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:33,905 INFO L225 Difference]: With dead ends: 180 [2021-11-02 22:59:33,906 INFO L226 Difference]: Without dead ends: 152 [2021-11-02 22:59:33,907 INFO L786 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 [2021-11-02 22:59:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-02 22:59:33,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 97. [2021-11-02 22:59:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.5833333333333333) internal successors, (152), 96 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) [2021-11-02 22:59:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 152 transitions. [2021-11-02 22:59:33,929 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 152 transitions. Word has length 12 [2021-11-02 22:59:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:33,930 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 152 transitions. [2021-11-02 22:59:33,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2021-11-02 22:59:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 152 transitions. [2021-11-02 22:59:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:59:33,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:33,933 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:33,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:34,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:34,147 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:34,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:34,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1251593412, now seen corresponding path program 1 times [2021-11-02 22:59:34,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:34,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136852114] [2021-11-02 22:59:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:34,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:34,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:34,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:34,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:59:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:34,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:59:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:34,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:34,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:34,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136852114] [2021-11-02 22:59:34,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136852114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:34,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:34,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-02 22:59:34,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189336760] [2021-11-02 22:59:34,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:59:34,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:59:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:59:34,577 INFO L87 Difference]: Start difference. First operand 97 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:35,363 INFO L93 Difference]: Finished difference Result 251 states and 421 transitions. [2021-11-02 22:59:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:59:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:59:35,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:35,367 INFO L225 Difference]: With dead ends: 251 [2021-11-02 22:59:35,368 INFO L226 Difference]: Without dead ends: 223 [2021-11-02 22:59:35,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:59:35,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-02 22:59:35,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-11-02 22:59:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5947368421052632) internal successors, (303), 190 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 303 transitions. [2021-11-02 22:59:35,395 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 303 transitions. Word has length 14 [2021-11-02 22:59:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:35,395 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 303 transitions. [2021-11-02 22:59:35,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 303 transitions. [2021-11-02 22:59:35,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:59:35,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:35,399 INFO L513 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] [2021-11-02 22:59:35,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:35,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:35,614 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2087887882, now seen corresponding path program 1 times [2021-11-02 22:59:35,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:35,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141442182] [2021-11-02 22:59:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:35,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:35,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:35,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:59:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:59:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:35,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:35,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:35,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141442182] [2021-11-02 22:59:35,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141442182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:35,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:35,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:59:35,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359491103] [2021-11-02 22:59:35,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:35,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:35,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:35,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:35,972 INFO L87 Difference]: Start difference. First operand 191 states and 303 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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) [2021-11-02 22:59:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:36,163 INFO L93 Difference]: Finished difference Result 449 states and 722 transitions. [2021-11-02 22:59:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:59:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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 26 [2021-11-02 22:59:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:36,170 INFO L225 Difference]: With dead ends: 449 [2021-11-02 22:59:36,170 INFO L226 Difference]: Without dead ends: 292 [2021-11-02 22:59:36,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-02 22:59:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 257. [2021-11-02 22:59:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.55078125) internal successors, (397), 256 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 397 transitions. [2021-11-02 22:59:36,239 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 397 transitions. Word has length 26 [2021-11-02 22:59:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:36,240 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 397 transitions. [2021-11-02 22:59:36,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 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) [2021-11-02 22:59:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 397 transitions. [2021-11-02 22:59:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:59:36,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:36,247 INFO L513 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] [2021-11-02 22:59:36,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:36,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:36,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:36,470 INFO L85 PathProgramCache]: Analyzing trace with hash 73987210, now seen corresponding path program 1 times [2021-11-02 22:59:36,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:36,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840063529] [2021-11-02 22:59:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:36,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:36,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:36,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:36,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:59:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:36,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:59:36,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:36,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:36,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:36,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840063529] [2021-11-02 22:59:36,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840063529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:36,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:36,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:59:36,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335142287] [2021-11-02 22:59:36,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:59:36,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:36,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:59:36,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:59:36,876 INFO L87 Difference]: Start difference. First operand 257 states and 397 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2021-11-02 22:59:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:37,275 INFO L93 Difference]: Finished difference Result 1005 states and 1558 transitions. [2021-11-02 22:59:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:59:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 26 [2021-11-02 22:59:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:37,283 INFO L225 Difference]: With dead ends: 1005 [2021-11-02 22:59:37,283 INFO L226 Difference]: Without dead ends: 784 [2021-11-02 22:59:37,286 INFO L786 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 [2021-11-02 22:59:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-02 22:59:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 636. [2021-11-02 22:59:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5181102362204724) internal successors, (964), 635 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:37,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 964 transitions. [2021-11-02 22:59:37,319 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 964 transitions. Word has length 26 [2021-11-02 22:59:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:37,320 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 964 transitions. [2021-11-02 22:59:37,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2021-11-02 22:59:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 964 transitions. [2021-11-02 22:59:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:59:37,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:37,329 INFO L513 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] [2021-11-02 22:59:37,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:37,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:37,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1742793183, now seen corresponding path program 1 times [2021-11-02 22:59:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262083516] [2021-11-02 22:59:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:37,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:37,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:37,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:59:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:59:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:59:37,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:59:37,859 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:37,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262083516] [2021-11-02 22:59:37,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262083516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:59:37,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:59:37,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:59:37,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048493426] [2021-11-02 22:59:37,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:59:37,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:59:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:59:37,864 INFO L87 Difference]: Start difference. First operand 636 states and 964 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:37,880 INFO L93 Difference]: Finished difference Result 652 states and 984 transitions. [2021-11-02 22:59:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:59:37,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 22:59:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:37,884 INFO L225 Difference]: With dead ends: 652 [2021-11-02 22:59:37,884 INFO L226 Difference]: Without dead ends: 279 [2021-11-02 22:59:37,887 INFO L786 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 [2021-11-02 22:59:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-02 22:59:37,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2021-11-02 22:59:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.4676258992805755) internal successors, (408), 278 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 408 transitions. [2021-11-02 22:59:37,905 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 408 transitions. Word has length 28 [2021-11-02 22:59:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:37,907 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 408 transitions. [2021-11-02 22:59:37,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 408 transitions. [2021-11-02 22:59:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:59:37,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:37,914 INFO L513 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] [2021-11-02 22:59:37,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:38,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:38,137 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash -711002843, now seen corresponding path program 1 times [2021-11-02 22:59:38,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:38,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871880465] [2021-11-02 22:59:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:38,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:38,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:38,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:59:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:59:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:38,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:39,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:39,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871880465] [2021-11-02 22:59:39,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871880465] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:39,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:39,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-02 22:59:39,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769861365] [2021-11-02 22:59:39,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:59:39,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:39,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:59:39,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:59:39,099 INFO L87 Difference]: Start difference. First operand 279 states and 408 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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) [2021-11-02 22:59:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:39,359 INFO L93 Difference]: Finished difference Result 385 states and 559 transitions. [2021-11-02 22:59:39,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:59:39,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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 43 [2021-11-02 22:59:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:39,363 INFO L225 Difference]: With dead ends: 385 [2021-11-02 22:59:39,363 INFO L226 Difference]: Without dead ends: 305 [2021-11-02 22:59:39,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:59:39,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-02 22:59:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 280. [2021-11-02 22:59:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.4265232974910393) internal successors, (398), 279 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 398 transitions. [2021-11-02 22:59:39,379 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 398 transitions. Word has length 43 [2021-11-02 22:59:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:39,379 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 398 transitions. [2021-11-02 22:59:39,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 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) [2021-11-02 22:59:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 398 transitions. [2021-11-02 22:59:39,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:59:39,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:39,382 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:39,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:39,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:39,601 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash -746049266, now seen corresponding path program 1 times [2021-11-02 22:59:39,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:39,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728583394] [2021-11-02 22:59:39,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:39,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:39,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:39,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:39,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:59:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:59:39,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:40,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:40,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728583394] [2021-11-02 22:59:40,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728583394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:59:40,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:40,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:59:40,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118043113] [2021-11-02 22:59:40,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:59:40,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:40,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:59:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:59:40,127 INFO L87 Difference]: Start difference. First operand 280 states and 398 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:40,416 INFO L93 Difference]: Finished difference Result 661 states and 995 transitions. [2021-11-02 22:59:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:59:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 [2021-11-02 22:59:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:40,421 INFO L225 Difference]: With dead ends: 661 [2021-11-02 22:59:40,421 INFO L226 Difference]: Without dead ends: 408 [2021-11-02 22:59:40,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:59:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-02 22:59:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 358. [2021-11-02 22:59:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.3837535014005602) internal successors, (494), 357 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 494 transitions. [2021-11-02 22:59:40,440 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 494 transitions. Word has length 44 [2021-11-02 22:59:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:40,441 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 494 transitions. [2021-11-02 22:59:40,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 494 transitions. [2021-11-02 22:59:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:59:40,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:40,443 INFO L513 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] [2021-11-02 22:59:40,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:40,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:40,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2080233776, now seen corresponding path program 1 times [2021-11-02 22:59:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:40,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662446445] [2021-11-02 22:59:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:40,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:40,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:40,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:59:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:59:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:41,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:41,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:41,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662446445] [2021-11-02 22:59:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662446445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:59:41,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 22:59:41,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290406276] [2021-11-02 22:59:41,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:59:41,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:59:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:59:41,409 INFO L87 Difference]: Start difference. First operand 358 states and 494 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) [2021-11-02 22:59:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:41,810 INFO L93 Difference]: Finished difference Result 1260 states and 1753 transitions. [2021-11-02 22:59:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:59:41,811 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 [2021-11-02 22:59:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:41,818 INFO L225 Difference]: With dead ends: 1260 [2021-11-02 22:59:41,819 INFO L226 Difference]: Without dead ends: 930 [2021-11-02 22:59:41,820 INFO L786 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 [2021-11-02 22:59:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-02 22:59:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 538. [2021-11-02 22:59:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4059590316573556) internal successors, (755), 537 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 755 transitions. [2021-11-02 22:59:41,864 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 755 transitions. Word has length 44 [2021-11-02 22:59:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:41,865 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 755 transitions. [2021-11-02 22:59:41,865 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) [2021-11-02 22:59:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 755 transitions. [2021-11-02 22:59:41,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:59:41,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:41,867 INFO L513 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] [2021-11-02 22:59:41,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:42,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:42,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:42,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1822068338, now seen corresponding path program 1 times [2021-11-02 22:59:42,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:42,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198938984] [2021-11-02 22:59:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:42,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:42,085 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:42,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:59:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:59:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:42,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:42,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:42,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198938984] [2021-11-02 22:59:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198938984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:59:42,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:42,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 22:59:42,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307781050] [2021-11-02 22:59:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:59:42,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:59:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:59:42,940 INFO L87 Difference]: Start difference. First operand 538 states and 755 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:43,409 INFO L93 Difference]: Finished difference Result 1376 states and 1982 transitions. [2021-11-02 22:59:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:59:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 22:59:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:43,417 INFO L225 Difference]: With dead ends: 1376 [2021-11-02 22:59:43,417 INFO L226 Difference]: Without dead ends: 841 [2021-11-02 22:59:43,419 INFO L786 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 [2021-11-02 22:59:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-11-02 22:59:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 655. [2021-11-02 22:59:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 1.3333333333333333) internal successors, (872), 654 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 872 transitions. [2021-11-02 22:59:43,461 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 872 transitions. Word has length 44 [2021-11-02 22:59:43,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:43,462 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 872 transitions. [2021-11-02 22:59:43,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 872 transitions. [2021-11-02 22:59:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:59:43,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:43,466 INFO L513 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] [2021-11-02 22:59:43,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:43,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:43,682 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:43,682 INFO L85 PathProgramCache]: Analyzing trace with hash 343661932, now seen corresponding path program 1 times [2021-11-02 22:59:43,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:43,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240636334] [2021-11-02 22:59:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:43,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:43,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:43,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:59:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:59:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:59:44,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:59:44,635 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:44,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240636334] [2021-11-02 22:59:44,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240636334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:59:44,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:44,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-02 22:59:44,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653603874] [2021-11-02 22:59:44,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:59:44,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:59:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:59:44,638 INFO L87 Difference]: Start difference. First operand 655 states and 872 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) [2021-11-02 22:59:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:44,941 INFO L93 Difference]: Finished difference Result 1545 states and 1975 transitions. [2021-11-02 22:59:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:59:44,942 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 [2021-11-02 22:59:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:44,950 INFO L225 Difference]: With dead ends: 1545 [2021-11-02 22:59:44,950 INFO L226 Difference]: Without dead ends: 918 [2021-11-02 22:59:44,952 INFO L786 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 [2021-11-02 22:59:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-02 22:59:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 564. [2021-11-02 22:59:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.2788632326820604) internal successors, (720), 563 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:59:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 720 transitions. [2021-11-02 22:59:44,989 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 720 transitions. Word has length 70 [2021-11-02 22:59:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:44,990 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 720 transitions. [2021-11-02 22:59:44,990 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) [2021-11-02 22:59:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 720 transitions. [2021-11-02 22:59:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:59:44,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:44,993 INFO L513 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] [2021-11-02 22:59:45,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:45,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:59:45,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:59:45,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:45,208 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-11-02 22:59:45,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:59:45,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595556827] [2021-11-02 22:59:45,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:59:45,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:59:45,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:59:45,211 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:59:45,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:59:45,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:59:45,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:59:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:59:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:51,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:59:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:55,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:59:55,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595556827] [2021-11-02 22:59:55,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595556827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:59:55,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:55,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-11-02 22:59:55,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791406043] [2021-11-02 22:59:55,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 22:59:55,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:59:55,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 22:59:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:59:55,760 INFO L87 Difference]: Start difference. First operand 564 states and 720 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) [2021-11-02 23:00:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:15,094 INFO L93 Difference]: Finished difference Result 1384 states and 1695 transitions. [2021-11-02 23:00:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 23:00:15,095 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 [2021-11-02 23:00:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:15,104 INFO L225 Difference]: With dead ends: 1384 [2021-11-02 23:00:15,104 INFO L226 Difference]: Without dead ends: 1267 [2021-11-02 23:00:15,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=2018, Invalid=9972, Unknown=0, NotChecked=0, Total=11990 [2021-11-02 23:00:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-11-02 23:00:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 762. [2021-11-02 23:00:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.2772667542706964) internal successors, (972), 761 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 972 transitions. [2021-11-02 23:00:15,173 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 972 transitions. Word has length 70 [2021-11-02 23:00:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:15,174 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 972 transitions. [2021-11-02 23:00:15,174 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) [2021-11-02 23:00:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 972 transitions. [2021-11-02 23:00:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 23:00:15,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:15,177 INFO L513 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] [2021-11-02 23:00:15,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:15,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:00:15,393 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -247756884, now seen corresponding path program 1 times [2021-11-02 23:00:15,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:00:15,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749883792] [2021-11-02 23:00:15,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:15,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:00:15,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:00:15,396 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:00:15,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 23:00:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:00:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:00:16,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:00:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:00:16,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:00:16,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749883792] [2021-11-02 23:00:16,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749883792] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:16,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:00:16,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-02 23:00:16,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151611149] [2021-11-02 23:00:16,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:00:16,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:00:16,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:00:16,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:00:16,799 INFO L87 Difference]: Start difference. First operand 762 states and 972 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:17,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:17,072 INFO L93 Difference]: Finished difference Result 988 states and 1239 transitions. [2021-11-02 23:00:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:00:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-11-02 23:00:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:17,079 INFO L225 Difference]: With dead ends: 988 [2021-11-02 23:00:17,079 INFO L226 Difference]: Without dead ends: 848 [2021-11-02 23:00:17,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:00:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-02 23:00:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 759. [2021-11-02 23:00:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.2770448548812665) internal successors, (968), 758 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 968 transitions. [2021-11-02 23:00:17,146 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 968 transitions. Word has length 70 [2021-11-02 23:00:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:17,146 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 968 transitions. [2021-11-02 23:00:17,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 968 transitions. [2021-11-02 23:00:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 23:00:17,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:17,150 INFO L513 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] [2021-11-02 23:00:17,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:17,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:00:17,351 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash 946149333, now seen corresponding path program 1 times [2021-11-02 23:00:17,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:00:17,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300375081] [2021-11-02 23:00:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:17,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:00:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:00:17,356 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:00:17,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 23:00:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:17,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:00:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 63 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:00:18,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:00:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:00:18,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:00:18,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300375081] [2021-11-02 23:00:18,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300375081] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:00:18,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:00:18,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 23:00:18,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580737898] [2021-11-02 23:00:18,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:00:18,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:00:18,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:00:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:00:18,940 INFO L87 Difference]: Start difference. First operand 759 states and 968 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:20,189 INFO L93 Difference]: Finished difference Result 1243 states and 1584 transitions. [2021-11-02 23:00:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:00:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 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 72 [2021-11-02 23:00:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:20,197 INFO L225 Difference]: With dead ends: 1243 [2021-11-02 23:00:20,197 INFO L226 Difference]: Without dead ends: 893 [2021-11-02 23:00:20,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:00:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-02 23:00:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 761. [2021-11-02 23:00:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.2736842105263158) internal successors, (968), 760 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 968 transitions. [2021-11-02 23:00:20,259 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 968 transitions. Word has length 72 [2021-11-02 23:00:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:20,259 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 968 transitions. [2021-11-02 23:00:20,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:00:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 968 transitions. [2021-11-02 23:00:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 23:00:20,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:20,262 INFO L513 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] [2021-11-02 23:00:20,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:20,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:00:20,478 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:00:20,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1135042114, now seen corresponding path program 1 times [2021-11-02 23:00:20,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:00:20,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565120393] [2021-11-02 23:00:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:20,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:00:20,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:00:20,481 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:00:20,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 23:00:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:00:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:26,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:00:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:31,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:00:31,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565120393] [2021-11-02 23:00:31,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565120393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:00:31,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:00:31,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-02 23:00:31,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770800539] [2021-11-02 23:00:31,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:00:31,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:00:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:00:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:00:31,553 INFO L87 Difference]: Start difference. First operand 761 states and 968 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) [2021-11-02 23:01:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:24,519 INFO L93 Difference]: Finished difference Result 2416 states and 2941 transitions. [2021-11-02 23:01:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-02 23:01:24,520 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 [2021-11-02 23:01:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:24,534 INFO L225 Difference]: With dead ends: 2416 [2021-11-02 23:01:24,535 INFO L226 Difference]: Without dead ends: 2261 [2021-11-02 23:01:24,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9864 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=4861, Invalid=31049, Unknown=0, NotChecked=0, Total=35910 [2021-11-02 23:01:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-11-02 23:01:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1321. [2021-11-02 23:01:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1320 states have (on average 1.268181818181818) internal successors, (1674), 1320 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:01:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1674 transitions. [2021-11-02 23:01:24,675 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1674 transitions. Word has length 74 [2021-11-02 23:01:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:24,676 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1674 transitions. [2021-11-02 23:01:24,676 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) [2021-11-02 23:01:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1674 transitions. [2021-11-02 23:01:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-02 23:01:24,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:24,680 INFO L513 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] [2021-11-02 23:01:24,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:24,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:01:24,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:01:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash -777616002, now seen corresponding path program 1 times [2021-11-02 23:01:24,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:01:24,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678494833] [2021-11-02 23:01:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:24,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:01:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:01:24,901 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:01:24,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 23:01:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:25,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:01:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:31,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:01:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:36,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:01:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678494833] [2021-11-02 23:01:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678494833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:01:36,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-02 23:01:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246113042] [2021-11-02 23:01:36,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-02 23:01:36,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:01:36,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-02 23:01:36,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-11-02 23:01:36,158 INFO L87 Difference]: Start difference. First operand 1321 states and 1674 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) [2021-11-02 23:02:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:05,917 INFO L93 Difference]: Finished difference Result 3162 states and 3928 transitions. [2021-11-02 23:02:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 23:02:05,919 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 [2021-11-02 23:02:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:05,934 INFO L225 Difference]: With dead ends: 3162 [2021-11-02 23:02:05,934 INFO L226 Difference]: Without dead ends: 2459 [2021-11-02 23:02:05,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4116 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=2322, Invalid=15768, Unknown=0, NotChecked=0, Total=18090 [2021-11-02 23:02:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-11-02 23:02:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1519. [2021-11-02 23:02:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 1.272068511198946) internal successors, (1931), 1518 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1931 transitions. [2021-11-02 23:02:06,102 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1931 transitions. Word has length 74 [2021-11-02 23:02:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:06,103 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 1931 transitions. [2021-11-02 23:02:06,104 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) [2021-11-02 23:02:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1931 transitions. [2021-11-02 23:02:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 23:02:06,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:06,113 INFO L513 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] [2021-11-02 23:02:06,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:06,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:06,314 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:06,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1420916641, now seen corresponding path program 1 times [2021-11-02 23:02:06,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:06,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244904761] [2021-11-02 23:02:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:06,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:06,317 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:06,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 23:02:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:07,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:02:07,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:08,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 29 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:08,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:08,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244904761] [2021-11-02 23:02:08,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244904761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:02:08,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:08,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-02 23:02:08,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677730189] [2021-11-02 23:02:08,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:02:08,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:02:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:02:08,614 INFO L87 Difference]: Start difference. First operand 1519 states and 1931 transitions. Second operand has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:09,976 INFO L93 Difference]: Finished difference Result 6185 states and 8544 transitions. [2021-11-02 23:02:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:02:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 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 [2021-11-02 23:02:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:09,997 INFO L225 Difference]: With dead ends: 6185 [2021-11-02 23:02:09,997 INFO L226 Difference]: Without dead ends: 3214 [2021-11-02 23:02:10,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:02:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-11-02 23:02:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 2600. [2021-11-02 23:02:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 1.1723739899961523) internal successors, (3047), 2599 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3047 transitions. [2021-11-02 23:02:10,270 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3047 transitions. Word has length 76 [2021-11-02 23:02:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:10,271 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 3047 transitions. [2021-11-02 23:02:10,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 12 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:02:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3047 transitions. [2021-11-02 23:02:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:02:10,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:10,274 INFO L513 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] [2021-11-02 23:02:10,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:10,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:10,493 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:02:10,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:10,494 INFO L85 PathProgramCache]: Analyzing trace with hash 881251465, now seen corresponding path program 1 times [2021-11-02 23:02:10,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:10,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748278837] [2021-11-02 23:02:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:10,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:10,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:10,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:10,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 23:02:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:02:11,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:18,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:25,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:25,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748278837] [2021-11-02 23:02:25,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748278837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:02:25,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:02:25,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-02 23:02:25,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884950297] [2021-11-02 23:02:25,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:02:25,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:02:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2277, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:02:25,666 INFO L87 Difference]: Start difference. First operand 2600 states and 3047 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) [2021-11-02 23:03:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:32,528 INFO L93 Difference]: Finished difference Result 4105 states and 4762 transitions. [2021-11-02 23:03:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-02 23:03:32,530 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 [2021-11-02 23:03:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:32,553 INFO L225 Difference]: With dead ends: 4105 [2021-11-02 23:03:32,553 INFO L226 Difference]: Without dead ends: 3853 [2021-11-02 23:03:32,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9241 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=4295, Invalid=30487, Unknown=0, NotChecked=0, Total=34782 [2021-11-02 23:03:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-11-02 23:03:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3090. [2021-11-02 23:03:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 1.1699579151829071) internal successors, (3614), 3089 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:03:32,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 3614 transitions. [2021-11-02 23:03:32,890 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 3614 transitions. Word has length 77 [2021-11-02 23:03:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:32,891 INFO L470 AbstractCegarLoop]: Abstraction has 3090 states and 3614 transitions. [2021-11-02 23:03:32,892 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) [2021-11-02 23:03:32,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 3614 transitions. [2021-11-02 23:03:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:03:32,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:32,896 INFO L513 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] [2021-11-02 23:03:32,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-02 23:03:33,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:33,117 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:03:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1269946569, now seen corresponding path program 2 times [2021-11-02 23:03:33,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:33,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45820497] [2021-11-02 23:03:33,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:03:33,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:33,121 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:33,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 23:03:34,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:03:34,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:03:34,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:03:34,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:41,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:48,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:48,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45820497] [2021-11-02 23:03:48,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45820497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:03:48,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-02 23:03:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439586786] [2021-11-02 23:03:48,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:03:48,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:03:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:03:48,793 INFO L87 Difference]: Start difference. First operand 3090 states and 3614 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) [2021-11-02 23:05:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:13,042 INFO L93 Difference]: Finished difference Result 5751 states and 6701 transitions. [2021-11-02 23:05:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-11-02 23:05:13,043 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 [2021-11-02 23:05:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:13,073 INFO L225 Difference]: With dead ends: 5751 [2021-11-02 23:05:13,073 INFO L226 Difference]: Without dead ends: 5004 [2021-11-02 23:05:13,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14675 ImplicationChecksByTransitivity, 77.3s TimeCoverageRelationStatistics Valid=6030, Invalid=42590, Unknown=0, NotChecked=0, Total=48620 [2021-11-02 23:05:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2021-11-02 23:05:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 4056. [2021-11-02 23:05:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 1.174845869297164) internal successors, (4764), 4055 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 4764 transitions. [2021-11-02 23:05:13,503 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 4764 transitions. Word has length 77 [2021-11-02 23:05:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:13,504 INFO L470 AbstractCegarLoop]: Abstraction has 4056 states and 4764 transitions. [2021-11-02 23:05:13,504 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) [2021-11-02 23:05:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 4764 transitions. [2021-11-02 23:05:13,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 23:05:13,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:13,508 INFO L513 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] [2021-11-02 23:05:13,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-02 23:05:13,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:13,729 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1690097737, now seen corresponding path program 3 times [2021-11-02 23:05:13,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:13,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595403009] [2021-11-02 23:05:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:05:13,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:13,731 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:13,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-02 23:05:15,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:05:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:05:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:21,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:27,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:27,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595403009] [2021-11-02 23:05:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595403009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:05:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-02 23:05:27,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028142793] [2021-11-02 23:05:27,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-02 23:05:27,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:27,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-02 23:05:27,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:05:27,713 INFO L87 Difference]: Start difference. First operand 4056 states and 4764 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) [2021-11-02 23:06:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:41,342 INFO L93 Difference]: Finished difference Result 8504 states and 9945 transitions. [2021-11-02 23:06:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-02 23:06:41,342 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 [2021-11-02 23:06:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:41,374 INFO L225 Difference]: With dead ends: 8504 [2021-11-02 23:06:41,375 INFO L226 Difference]: Without dead ends: 6787 [2021-11-02 23:06:41,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14192 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=6816, Invalid=40490, Unknown=0, NotChecked=0, Total=47306 [2021-11-02 23:06:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2021-11-02 23:06:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 4577. [2021-11-02 23:06:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 1.1748251748251748) internal successors, (5376), 4576 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 5376 transitions. [2021-11-02 23:06:41,772 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 5376 transitions. Word has length 77 [2021-11-02 23:06:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:41,773 INFO L470 AbstractCegarLoop]: Abstraction has 4577 states and 5376 transitions. [2021-11-02 23:06:41,773 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) [2021-11-02 23:06:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 5376 transitions. [2021-11-02 23:06:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:06:41,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:41,776 INFO L513 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] [2021-11-02 23:06:41,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:41,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:06:41,993 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-11-02 23:06:41,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:06:41,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515061681] [2021-11-02 23:06:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:41,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:06:41,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:06:42,003 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:06:42,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-02 23:06:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:44,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:06:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:50,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:06:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:06:58,474 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:06:58,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1515061681] [2021-11-02 23:06:58,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1515061681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:06:58,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:58,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-02 23:06:58,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831552627] [2021-11-02 23:06:58,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:06:58,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:06:58,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:06:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:06:58,477 INFO L87 Difference]: Start difference. First operand 4577 states and 5376 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) [2021-11-02 23:08:54,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:54,230 INFO L93 Difference]: Finished difference Result 7873 states and 9153 transitions. [2021-11-02 23:08:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2021-11-02 23:08:54,231 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 [2021-11-02 23:08:54,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:54,244 INFO L225 Difference]: With dead ends: 7873 [2021-11-02 23:08:54,244 INFO L226 Difference]: Without dead ends: 7629 [2021-11-02 23:08:54,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22488 ImplicationChecksByTransitivity, 106.8s TimeCoverageRelationStatistics Valid=6744, Invalid=61116, Unknown=0, NotChecked=0, Total=67860 [2021-11-02 23:08:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-11-02 23:08:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5489. [2021-11-02 23:08:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5488 states have (on average 1.1701895043731778) internal successors, (6422), 5488 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 6422 transitions. [2021-11-02 23:08:54,758 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 6422 transitions. Word has length 80 [2021-11-02 23:08:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:54,758 INFO L470 AbstractCegarLoop]: Abstraction has 5489 states and 6422 transitions. [2021-11-02 23:08:54,759 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) [2021-11-02 23:08:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 6422 transitions. [2021-11-02 23:08:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:08:54,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:54,762 INFO L513 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] [2021-11-02 23:08:54,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:54,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:08:54,983 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-11-02 23:08:54,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:08:54,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232534185] [2021-11-02 23:08:54,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:54,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:08:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:08:54,985 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:08:54,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-02 23:08:57,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:57,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:08:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:09:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:10,077 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:09:10,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232534185] [2021-11-02 23:09:10,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232534185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:09:10,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:10,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-02 23:09:10,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361119482] [2021-11-02 23:09:10,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:09:10,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:09:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:09:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:09:10,079 INFO L87 Difference]: Start difference. First operand 5489 states and 6422 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) [2021-11-02 23:11:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:11:17,355 INFO L93 Difference]: Finished difference Result 10928 states and 12702 transitions. [2021-11-02 23:11:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2021-11-02 23:11:17,358 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 [2021-11-02 23:11:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:11:17,375 INFO L225 Difference]: With dead ends: 10928 [2021-11-02 23:11:17,376 INFO L226 Difference]: Without dead ends: 8236 [2021-11-02 23:11:17,387 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23813 ImplicationChecksByTransitivity, 110.5s TimeCoverageRelationStatistics Valid=6087, Invalid=64403, Unknown=0, NotChecked=0, Total=70490 [2021-11-02 23:11:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8236 states. [2021-11-02 23:11:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8236 to 6197. [2021-11-02 23:11:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6197 states, 6196 states have (on average 1.1676888315041962) internal successors, (7235), 6196 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:11:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6197 states to 6197 states and 7235 transitions. [2021-11-02 23:11:17,986 INFO L78 Accepts]: Start accepts. Automaton has 6197 states and 7235 transitions. Word has length 80 [2021-11-02 23:11:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:11:17,986 INFO L470 AbstractCegarLoop]: Abstraction has 6197 states and 7235 transitions. [2021-11-02 23:11:17,987 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) [2021-11-02 23:11:17,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6197 states and 7235 transitions. [2021-11-02 23:11:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-02 23:11:17,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:11:17,990 INFO L513 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] [2021-11-02 23:11:18,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:11:18,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:11:18,201 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:11:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:11:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -825823845, now seen corresponding path program 3 times [2021-11-02 23:11:18,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:11:18,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342625783] [2021-11-02 23:11:18,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:11:18,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:11:18,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:11:18,203 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:11:18,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b31b8470-9fcc-44a3-be68-21f855fff40e/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-02 23:11:20,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:11:20,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:11:20,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 23:11:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:11:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:11:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:11:34,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:11:34,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342625783] [2021-11-02 23:11:34,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342625783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:11:34,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:11:34,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-02 23:11:34,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603509068] [2021-11-02 23:11:34,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:11:34,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:11:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:11:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:11:34,940 INFO L87 Difference]: Start difference. First operand 6197 states and 7235 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)