./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-queue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY --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 338b6951ab628b0237aa41c64d1786e44f90130a76a8fd0978f750b3fe39d026 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:31:01,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:31:01,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:31:01,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:31:01,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:31:01,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:31:01,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:31:01,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:31:01,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:31:01,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:31:01,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:31:01,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:31:01,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:31:01,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:31:01,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:31:01,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:31:01,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:31:01,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:31:01,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:31:01,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:31:01,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:31:01,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:31:01,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:31:01,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:31:01,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:31:01,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:31:01,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:31:01,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:31:01,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:31:01,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:31:01,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:31:01,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:31:01,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:31:01,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:31:01,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:31:01,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:31:01,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:31:01,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:31:01,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:31:01,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:31:01,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:31:01,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:31:01,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:31:01,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:31:01,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:31:01,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:31:01,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:31:01,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:31:01,326 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:31:01,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:31:01,327 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:31:01,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:31:01,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:31:01,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:31:01,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:31:01,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:31:01,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:31:01,329 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:31:01,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:31:01,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:31:01,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:31:01,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:31:01,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:31:01,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:31:01,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:31:01,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:31:01,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:31:01,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:31:01,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:31:01,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:31:01,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:31:01,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:31:01,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:31:01,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:31:01,332 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_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 338b6951ab628b0237aa41c64d1786e44f90130a76a8fd0978f750b3fe39d026 [2021-11-07 08:31:01,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:31:01,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:31:01,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:31:01,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:31:01,650 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:31:01,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/forester-heap/dll-queue-2.i [2021-11-07 08:31:01,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/data/5e148cb0a/f56709a73b794c799a87eed3f60ea537/FLAG77a933562 [2021-11-07 08:31:02,248 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:31:02,248 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i [2021-11-07 08:31:02,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/data/5e148cb0a/f56709a73b794c799a87eed3f60ea537/FLAG77a933562 [2021-11-07 08:31:02,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/data/5e148cb0a/f56709a73b794c799a87eed3f60ea537 [2021-11-07 08:31:02,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:31:02,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:31:02,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:31:02,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:31:02,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:31:02,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:31:02" (1/1) ... [2021-11-07 08:31:02,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3730c7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:02, skipping insertion in model container [2021-11-07 08:31:02,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:31:02" (1/1) ... [2021-11-07 08:31:02,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:31:02,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:31:03,158 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22460,22473] [2021-11-07 08:31:03,163 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22531,22544] [2021-11-07 08:31:03,165 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22605,22618] [2021-11-07 08:31:03,167 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22697,22710] [2021-11-07 08:31:03,169 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22774,22787] [2021-11-07 08:31:03,171 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22869,22882] [2021-11-07 08:31:03,173 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22946,22959] [2021-11-07 08:31:03,174 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23029,23042] [2021-11-07 08:31:03,177 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23124,23137] [2021-11-07 08:31:03,179 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23201,23214] [2021-11-07 08:31:03,181 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23284,23297] [2021-11-07 08:31:03,183 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23373,23386] [2021-11-07 08:31:03,185 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23459,23472] [2021-11-07 08:31:03,187 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23604,23617] [2021-11-07 08:31:03,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:31:03,205 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:31:03,249 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22460,22473] [2021-11-07 08:31:03,250 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22531,22544] [2021-11-07 08:31:03,251 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22605,22618] [2021-11-07 08:31:03,252 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22697,22710] [2021-11-07 08:31:03,253 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22774,22787] [2021-11-07 08:31:03,267 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22869,22882] [2021-11-07 08:31:03,267 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[22946,22959] [2021-11-07 08:31:03,268 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23029,23042] [2021-11-07 08:31:03,268 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23124,23137] [2021-11-07 08:31:03,269 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23201,23214] [2021-11-07 08:31:03,270 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23284,23297] [2021-11-07 08:31:03,271 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23373,23386] [2021-11-07 08:31:03,272 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23459,23472] [2021-11-07 08:31:03,273 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_6b36e512-6940-44c9-ab62-5d083c47833b/sv-benchmarks/c/forester-heap/dll-queue-2.i[23604,23617] [2021-11-07 08:31:03,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:31:03,300 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:31:03,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03 WrapperNode [2021-11-07 08:31:03,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:31:03,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:31:03,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:31:03,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:31:03,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:31:03,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:31:03,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:31:03,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:31:03,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:31:03,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:31:03,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:31:03,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:31:03,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (1/1) ... [2021-11-07 08:31:03,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:31:03,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:03,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:31:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:31:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:31:03,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:31:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:31:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:31:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:31:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:31:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:31:03,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:31:03,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:31:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:31:03,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:31:03,959 INFO L299 CfgBuilder]: Removed 35 assume(true) statements. [2021-11-07 08:31:03,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:03 BoogieIcfgContainer [2021-11-07 08:31:03,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:31:03,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:31:03,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:31:03,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:31:03,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:31:02" (1/3) ... [2021-11-07 08:31:03,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c65781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:03, skipping insertion in model container [2021-11-07 08:31:03,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:03" (2/3) ... [2021-11-07 08:31:03,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c65781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:03, skipping insertion in model container [2021-11-07 08:31:03,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:03" (3/3) ... [2021-11-07 08:31:03,970 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-queue-2.i [2021-11-07 08:31:03,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:31:03,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-07 08:31:04,013 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:31:04,019 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 [2021-11-07 08:31:04,020 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-07 08:31:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 70 states have (on average 2.0) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 08:31:04,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:04,055 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 08:31:04,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 28752478, now seen corresponding path program 1 times [2021-11-07 08:31:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:04,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946264763] [2021-11-07 08:31:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:04,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:04,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:04,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946264763] [2021-11-07 08:31:04,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946264763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:04,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:04,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:31:04,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202995037] [2021-11-07 08:31:04,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:31:04,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:04,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:31:04,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:31:04,311 INFO L87 Difference]: Start difference. First operand has 85 states, 70 states have (on average 2.0) internal successors, (140), 84 states have internal predecessors, (140), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:04,334 INFO L93 Difference]: Finished difference Result 168 states and 278 transitions. [2021-11-07 08:31:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:31:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-07 08:31:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:04,344 INFO L225 Difference]: With dead ends: 168 [2021-11-07 08:31:04,344 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:31:04,347 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 [2021-11-07 08:31:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:31:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-07 08:31:04,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 79 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) [2021-11-07 08:31:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-07 08:31:04,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 5 [2021-11-07 08:31:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:04,380 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-07 08:31:04,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-07 08:31:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 08:31:04,381 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:04,382 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 08:31:04,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:31:04,382 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash 889571111, now seen corresponding path program 1 times [2021-11-07 08:31:04,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:04,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074245792] [2021-11-07 08:31:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:04,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:04,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:04,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074245792] [2021-11-07 08:31:04,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074245792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:04,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:04,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:04,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040766167] [2021-11-07 08:31:04,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:04,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:04,442 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:04,476 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-07 08:31:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 08:31:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:04,478 INFO L225 Difference]: With dead ends: 80 [2021-11-07 08:31:04,478 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:31:04,479 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 [2021-11-07 08:31:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:31:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-07 08:31:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 69 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) [2021-11-07 08:31:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-11-07 08:31:04,487 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 6 [2021-11-07 08:31:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-11-07 08:31:04,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-11-07 08:31:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:31:04,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:04,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:04,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:31:04,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1270244236, now seen corresponding path program 1 times [2021-11-07 08:31:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:04,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134788891] [2021-11-07 08:31:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:04,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:04,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:04,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134788891] [2021-11-07 08:31:04,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134788891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:04,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:04,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:31:04,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32997769] [2021-11-07 08:31:04,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:31:04,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:31:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:04,600 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:04,686 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2021-11-07 08:31:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:31:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 08:31:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:04,688 INFO L225 Difference]: With dead ends: 119 [2021-11-07 08:31:04,689 INFO L226 Difference]: Without dead ends: 117 [2021-11-07 08:31:04,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-07 08:31:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 68. [2021-11-07 08:31:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 67 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) [2021-11-07 08:31:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-11-07 08:31:04,698 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 9 [2021-11-07 08:31:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:04,699 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-11-07 08:31:04,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-11-07 08:31:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:31:04,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:04,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:31:04,700 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1286414876, now seen corresponding path program 1 times [2021-11-07 08:31:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:04,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660149994] [2021-11-07 08:31:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:04,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:04,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:04,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660149994] [2021-11-07 08:31:04,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660149994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:04,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:04,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:04,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206760790] [2021-11-07 08:31:04,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:04,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:04,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:04,741 INFO L87 Difference]: Start difference. First operand 68 states and 77 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) [2021-11-07 08:31:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:04,771 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2021-11-07 08:31:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:04,772 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 [2021-11-07 08:31:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:04,773 INFO L225 Difference]: With dead ends: 153 [2021-11-07 08:31:04,773 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 08:31:04,774 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 [2021-11-07 08:31:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 08:31:04,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-11-07 08:31:04,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 75 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2021-11-07 08:31:04,782 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 12 [2021-11-07 08:31:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:04,782 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2021-11-07 08:31:04,783 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) [2021-11-07 08:31:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2021-11-07 08:31:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:31:04,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:04,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:04,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:31:04,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash -138012862, now seen corresponding path program 1 times [2021-11-07 08:31:04,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:04,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259540354] [2021-11-07 08:31:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:04,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:04,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:04,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259540354] [2021-11-07 08:31:04,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259540354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:04,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:31:04,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341203294] [2021-11-07 08:31:04,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:04,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:04,857 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:04,955 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-11-07 08:31:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:31:04,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-07 08:31:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:04,956 INFO L225 Difference]: With dead ends: 91 [2021-11-07 08:31:04,956 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:31:04,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:31:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:31:04,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-07 08:31:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.253968253968254) internal successors, (79), 70 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) [2021-11-07 08:31:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-11-07 08:31:04,964 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 17 [2021-11-07 08:31:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:04,964 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-11-07 08:31:04,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-11-07 08:31:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:31:04,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:04,966 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:04,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:31:04,966 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:04,967 INFO L85 PathProgramCache]: Analyzing trace with hash -472870040, now seen corresponding path program 1 times [2021-11-07 08:31:04,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:04,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106739693] [2021-11-07 08:31:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:04,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:05,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:05,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106739693] [2021-11-07 08:31:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106739693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:05,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870045716] [2021-11-07 08:31:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:05,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:05,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:05,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:05,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:31:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:31:05,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:31:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:05,402 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 08:31:05,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 43 [2021-11-07 08:31:05,416 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:31:05,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-11-07 08:31:05,543 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-11-07 08:31:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 64 [2021-11-07 08:31:06,268 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-11-07 08:31:06,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-11-07 08:31:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:06,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870045716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:06,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:06,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-11-07 08:31:06,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117549217] [2021-11-07 08:31:06,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:31:06,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:31:06,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:31:06,294 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:06,538 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2021-11-07 08:31:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:31:06,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 08:31:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:06,540 INFO L225 Difference]: With dead ends: 134 [2021-11-07 08:31:06,540 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 08:31:06,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:31:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 08:31:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 84. [2021-11-07 08:31:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.236842105263158) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-07 08:31:06,549 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 19 [2021-11-07 08:31:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:06,549 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-07 08:31:06,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-07 08:31:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:31:06,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:06,551 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:06,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:06,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:06,767 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:06,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:06,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1456359625, now seen corresponding path program 1 times [2021-11-07 08:31:06,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:06,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926994070] [2021-11-07 08:31:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:06,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:06,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:06,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926994070] [2021-11-07 08:31:06,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926994070] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:06,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:06,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:06,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037497393] [2021-11-07 08:31:06,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:06,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:06,849 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:06,882 INFO L93 Difference]: Finished difference Result 174 states and 199 transitions. [2021-11-07 08:31:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:31:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:06,884 INFO L225 Difference]: With dead ends: 174 [2021-11-07 08:31:06,884 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 08:31:06,886 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 [2021-11-07 08:31:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 08:31:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2021-11-07 08:31:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.202247191011236) internal successors, (107), 96 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-11-07 08:31:06,903 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 20 [2021-11-07 08:31:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-11-07 08:31:06,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-11-07 08:31:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:31:06,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:06,904 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:06,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:31:06,904 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 886899864, now seen corresponding path program 1 times [2021-11-07 08:31:06,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:06,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660610894] [2021-11-07 08:31:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:06,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:31:06,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:06,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660610894] [2021-11-07 08:31:06,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660610894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:06,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:06,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73566734] [2021-11-07 08:31:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:06,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:06,956 INFO L87 Difference]: Start difference. First operand 97 states and 107 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) [2021-11-07 08:31:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:06,992 INFO L93 Difference]: Finished difference Result 201 states and 228 transitions. [2021-11-07 08:31:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:06,992 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 27 [2021-11-07 08:31:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:06,994 INFO L225 Difference]: With dead ends: 201 [2021-11-07 08:31:06,994 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 08:31:06,996 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 [2021-11-07 08:31:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 08:31:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-11-07 08:31:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 109 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-11-07 08:31:07,002 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 27 [2021-11-07 08:31:07,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:07,002 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-11-07 08:31:07,002 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) [2021-11-07 08:31:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-11-07 08:31:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:31:07,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:07,004 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:07,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:31:07,004 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2041801735, now seen corresponding path program 1 times [2021-11-07 08:31:07,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:07,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925854098] [2021-11-07 08:31:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:07,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:07,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:07,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925854098] [2021-11-07 08:31:07,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925854098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:07,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906632389] [2021-11-07 08:31:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:07,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:07,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:07,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:31:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 08:31:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:07,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:31:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:07,444 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 08:31:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 49 [2021-11-07 08:31:07,477 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:31:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-07 08:31:07,601 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-07 08:31:07,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 57 [2021-11-07 08:31:08,003 INFO L354 Elim1Store]: treesize reduction 207, result has 17.9 percent of original size [2021-11-07 08:31:08,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 202 treesize of output 117 [2021-11-07 08:31:08,028 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-11-07 08:31:08,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 179 [2021-11-07 08:31:08,464 INFO L354 Elim1Store]: treesize reduction 232, result has 15.3 percent of original size [2021-11-07 08:31:08,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 146 treesize of output 101 [2021-11-07 08:31:11,211 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-07 08:31:11,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 69 [2021-11-07 08:31:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:11,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906632389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:11,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:11,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-11-07 08:31:11,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401896873] [2021-11-07 08:31:11,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:31:11,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:31:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:31:11,258 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:15,194 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2021-11-07 08:31:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:31:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 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 [2021-11-07 08:31:15,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:15,195 INFO L225 Difference]: With dead ends: 180 [2021-11-07 08:31:15,196 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 08:31:15,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:31:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 08:31:15,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2021-11-07 08:31:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.1694915254237288) internal successors, (138), 125 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) [2021-11-07 08:31:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2021-11-07 08:31:15,217 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 28 [2021-11-07 08:31:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:15,222 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2021-11-07 08:31:15,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2021-11-07 08:31:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:31:15,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:15,223 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:31:15,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:15,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-07 08:31:15,437 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:15,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1259768676, now seen corresponding path program 1 times [2021-11-07 08:31:15,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:15,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451142979] [2021-11-07 08:31:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:15,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:31:15,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:15,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451142979] [2021-11-07 08:31:15,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451142979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:15,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:15,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:15,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407071316] [2021-11-07 08:31:15,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:15,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:15,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:15,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:15,483 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:15,493 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-07 08:31:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:31:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:15,495 INFO L225 Difference]: With dead ends: 129 [2021-11-07 08:31:15,495 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 08:31:15,495 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 [2021-11-07 08:31:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 08:31:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-07 08:31:15,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 126 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2021-11-07 08:31:15,500 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 29 [2021-11-07 08:31:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:15,500 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2021-11-07 08:31:15,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2021-11-07 08:31:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:31:15,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:15,502 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:31:15,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:31:15,502 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1259766754, now seen corresponding path program 1 times [2021-11-07 08:31:15,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:15,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046874070] [2021-11-07 08:31:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:15,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:15,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:15,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046874070] [2021-11-07 08:31:15,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046874070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:15,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008109298] [2021-11-07 08:31:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:15,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:15,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:15,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:31:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:31:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:16,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:31:16,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:31:16,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,080 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:31:16,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-11-07 08:31:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,101 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:31:16,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 59 [2021-11-07 08:31:16,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:31:16,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-11-07 08:31:16,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:31:16,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:31:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 93 [2021-11-07 08:31:16,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:16,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:31:16,215 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:31:16,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 88 [2021-11-07 08:31:16,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2021-11-07 08:31:16,795 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 08:31:16,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 58 [2021-11-07 08:31:16,802 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-07 08:31:16,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 30 [2021-11-07 08:31:16,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-07 08:31:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:16,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008109298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:16,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:16,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-11-07 08:31:16,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633534639] [2021-11-07 08:31:16,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:31:16,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:16,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:31:16,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:31:16,881 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:17,329 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2021-11-07 08:31:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:31:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 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 29 [2021-11-07 08:31:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:17,330 INFO L225 Difference]: With dead ends: 153 [2021-11-07 08:31:17,330 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 08:31:17,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:31:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 08:31:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 136. [2021-11-07 08:31:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 128 states have (on average 1.1640625) internal successors, (149), 135 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 149 transitions. [2021-11-07 08:31:17,338 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 149 transitions. Word has length 29 [2021-11-07 08:31:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:17,338 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 149 transitions. [2021-11-07 08:31:17,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:17,338 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 149 transitions. [2021-11-07 08:31:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 08:31:17,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:17,340 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:17,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:17,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:31:17,553 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1992708989, now seen corresponding path program 1 times [2021-11-07 08:31:17,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:17,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999732152] [2021-11-07 08:31:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:17,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:17,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:17,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999732152] [2021-11-07 08:31:17,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999732152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:17,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949888585] [2021-11-07 08:31:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:17,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:17,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:17,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:17,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:31:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:18,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 08:31:18,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:31:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:18,150 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:31:18,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-07 08:31:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:18,172 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:31:18,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-07 08:31:18,186 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:31:18,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-07 08:31:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 08:31:18,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:18,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:18,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 08:31:18,604 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-11-07 08:31:18,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 276 treesize of output 155 [2021-11-07 08:31:18,656 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-07 08:31:18,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 151 treesize of output 128 [2021-11-07 08:31:18,672 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-07 08:31:18,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 121 [2021-11-07 08:31:18,917 INFO L354 Elim1Store]: treesize reduction 208, result has 16.8 percent of original size [2021-11-07 08:31:18,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 235 treesize of output 142 [2021-11-07 08:31:18,990 INFO L354 Elim1Store]: treesize reduction 384, result has 14.7 percent of original size [2021-11-07 08:31:18,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 201 treesize of output 179 [2021-11-07 08:31:20,675 INFO L354 Elim1Store]: treesize reduction 117, result has 12.0 percent of original size [2021-11-07 08:31:20,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 175 treesize of output 96 [2021-11-07 08:31:20,693 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-07 08:31:20,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 58 [2021-11-07 08:31:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:20,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949888585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:20,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:20,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-11-07 08:31:20,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194862269] [2021-11-07 08:31:20,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:31:20,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:31:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:31:20,731 INFO L87 Difference]: Start difference. First operand 136 states and 149 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:21,332 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2021-11-07 08:31:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:31:21,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 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 31 [2021-11-07 08:31:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:21,334 INFO L225 Difference]: With dead ends: 169 [2021-11-07 08:31:21,334 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 08:31:21,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:31:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 08:31:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2021-11-07 08:31:21,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 138 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) [2021-11-07 08:31:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 152 transitions. [2021-11-07 08:31:21,343 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 152 transitions. Word has length 31 [2021-11-07 08:31:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:21,343 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 152 transitions. [2021-11-07 08:31:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 152 transitions. [2021-11-07 08:31:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:31:21,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:21,345 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:21,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:21,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:21,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash 509365297, now seen corresponding path program 1 times [2021-11-07 08:31:21,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:21,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494668507] [2021-11-07 08:31:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:21,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 08:31:21,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:21,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494668507] [2021-11-07 08:31:21,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494668507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:21,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:21,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:21,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84056056] [2021-11-07 08:31:21,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:21,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:21,599 INFO L87 Difference]: Start difference. First operand 139 states and 152 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:21,629 INFO L93 Difference]: Finished difference Result 204 states and 226 transitions. [2021-11-07 08:31:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:21,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 08:31:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:21,631 INFO L225 Difference]: With dead ends: 204 [2021-11-07 08:31:21,631 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 08:31:21,632 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 [2021-11-07 08:31:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 08:31:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2021-11-07 08:31:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.120879120879121) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2021-11-07 08:31:21,638 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 36 [2021-11-07 08:31:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:21,639 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2021-11-07 08:31:21,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:21,639 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2021-11-07 08:31:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:31:21,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:21,640 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] [2021-11-07 08:31:21,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:31:21,640 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:21,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:21,641 INFO L85 PathProgramCache]: Analyzing trace with hash 525270376, now seen corresponding path program 1 times [2021-11-07 08:31:21,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:21,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495580140] [2021-11-07 08:31:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:21,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:31:21,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:21,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495580140] [2021-11-07 08:31:21,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495580140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:21,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:21,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:31:21,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020490508] [2021-11-07 08:31:21,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:31:21,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:21,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:31:21,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:31:21,676 INFO L87 Difference]: Start difference. First operand 96 states and 102 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) [2021-11-07 08:31:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:21,711 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-11-07 08:31:21,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:31:21,712 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 37 [2021-11-07 08:31:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:21,713 INFO L225 Difference]: With dead ends: 118 [2021-11-07 08:31:21,713 INFO L226 Difference]: Without dead ends: 107 [2021-11-07 08:31:21,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-07 08:31:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-11-07 08:31:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.11) internal successors, (111), 104 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-11-07 08:31:21,721 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 37 [2021-11-07 08:31:21,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-11-07 08:31:21,722 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) [2021-11-07 08:31:21,722 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-11-07 08:31:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:31:21,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:21,723 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 08:31:21,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:31:21,723 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:21,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1226334954, now seen corresponding path program 1 times [2021-11-07 08:31:21,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:21,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028770865] [2021-11-07 08:31:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:21,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:21,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:21,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028770865] [2021-11-07 08:31:21,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028770865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:21,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413509428] [2021-11-07 08:31:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:21,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:21,920 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:21,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:31:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 08:31:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:31:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:22,411 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:31:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-11-07 08:31:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:22,435 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-07 08:31:22,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 68 [2021-11-07 08:31:22,443 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-07 08:31:22,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2021-11-07 08:31:22,514 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:31:22,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 82 [2021-11-07 08:31:22,520 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-07 08:31:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2021-11-07 08:31:23,231 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-07 08:31:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 52 [2021-11-07 08:31:23,242 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-07 08:31:23,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 26 [2021-11-07 08:31:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:23,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413509428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:23,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:31:23,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-11-07 08:31:23,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361332620] [2021-11-07 08:31:23,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:31:23,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:31:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:31:23,263 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:25,386 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2021-11-07 08:31:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:31:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 08:31:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:25,387 INFO L225 Difference]: With dead ends: 111 [2021-11-07 08:31:25,387 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:31:25,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:31:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:31:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-07 08:31:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.12) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-07 08:31:25,393 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 37 [2021-11-07 08:31:25,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:25,393 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-07 08:31:25,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:31:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-07 08:31:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:31:25,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:25,394 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:25,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:31:25,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:25,594 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:31:25,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:25,595 INFO L85 PathProgramCache]: Analyzing trace with hash 778254669, now seen corresponding path program 1 times [2021-11-07 08:31:25,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:25,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199385941] [2021-11-07 08:31:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:25,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:25,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:25,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199385941] [2021-11-07 08:31:25,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199385941] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:31:25,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762016096] [2021-11-07 08:31:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:25,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:31:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:25,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:31:25,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:31:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 08:31:26,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:31:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:31:26,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:31:26,450 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-07 08:31:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 49 [2021-11-07 08:31:26,465 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:31:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 50 [2021-11-07 08:31:26,563 INFO L354 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2021-11-07 08:31:26,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 41 [2021-11-07 08:31:26,970 INFO L354 Elim1Store]: treesize reduction 207, result has 17.9 percent of original size [2021-11-07 08:31:26,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 208 treesize of output 123 [2021-11-07 08:31:27,004 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-07 08:31:27,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 183 treesize of output 206 [2021-11-07 08:31:27,754 INFO L354 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2021-11-07 08:31:27,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 147 treesize of output 99 [2021-11-07 08:31:29,065 INFO L354 Elim1Store]: treesize reduction 441, result has 11.8 percent of original size [2021-11-07 08:31:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 327 treesize of output 159 [2021-11-07 08:31:29,089 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-11-07 08:31:29,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 274 treesize of output 302 [2021-11-07 08:31:37,301 INFO L354 Elim1Store]: treesize reduction 408, result has 12.1 percent of original size [2021-11-07 08:31:37,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 258 treesize of output 142 [2021-11-07 08:32:02,883 INFO L354 Elim1Store]: treesize reduction 168, result has 13.0 percent of original size [2021-11-07 08:32:02,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 215 treesize of output 104 [2021-11-07 08:32:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:03,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762016096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:32:03,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:32:03,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-07 08:32:03,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845546830] [2021-11-07 08:32:03,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:32:03,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:32:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=271, Unknown=7, NotChecked=0, Total=342 [2021-11-07 08:32:03,173 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:07,266 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2021-11-07 08:33:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:33:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 08:33:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:07,268 INFO L225 Difference]: With dead ends: 149 [2021-11-07 08:33:07,268 INFO L226 Difference]: Without dead ends: 147 [2021-11-07 08:33:07,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=141, Invalid=603, Unknown=12, NotChecked=0, Total=756 [2021-11-07 08:33:07,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-07 08:33:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 78. [2021-11-07 08:33:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-07 08:33:07,276 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 38 [2021-11-07 08:33:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:07,276 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-07 08:33:07,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-07 08:33:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:33:07,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:07,278 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-07 08:33:07,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:07,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:07,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:33:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1793269558, now seen corresponding path program 1 times [2021-11-07 08:33:07,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:07,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021270414] [2021-11-07 08:33:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:07,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:07,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:07,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021270414] [2021-11-07 08:33:07,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021270414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:07,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556169387] [2021-11-07 08:33:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:07,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:07,929 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:07,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:33:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:33:08,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:08,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:33:08,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,625 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:33:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-07 08:33:08,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,652 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:33:08,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-07 08:33:08,671 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:33:08,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-07 08:33:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 08:33:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:08,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 08:33:08,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:33:09,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:09,281 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-11-07 08:33:09,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 340 treesize of output 203 [2021-11-07 08:33:09,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:09,339 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-07 08:33:09,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 215 treesize of output 192 [2021-11-07 08:33:09,386 INFO L354 Elim1Store]: treesize reduction 96, result has 26.2 percent of original size [2021-11-07 08:33:09,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 151 [2021-11-07 08:33:09,402 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-07 08:33:09,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 139 [2021-11-07 08:33:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:09,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:09,685 INFO L354 Elim1Store]: treesize reduction 208, result has 16.8 percent of original size [2021-11-07 08:33:09,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 158 [2021-11-07 08:33:09,704 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-11-07 08:33:09,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 220 [2021-11-07 08:33:09,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:33:09,766 INFO L354 Elim1Store]: treesize reduction 384, result has 14.7 percent of original size [2021-11-07 08:33:09,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 217 treesize of output 195 [2021-11-07 08:33:12,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~item~0.offset] [2021-11-07 08:33:12,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:33:12,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-07 08:33:12,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561247837] [2021-11-07 08:33:12,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:33:12,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:12,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:33:12,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:33:12,716 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:13,294 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-11-07 08:33:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:33:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-07 08:33:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:13,296 INFO L225 Difference]: With dead ends: 101 [2021-11-07 08:33:13,296 INFO L226 Difference]: Without dead ends: 99 [2021-11-07 08:33:13,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:33:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-07 08:33:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 84. [2021-11-07 08:33:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.1125) internal successors, (89), 83 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) [2021-11-07 08:33:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-11-07 08:33:13,306 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 40 [2021-11-07 08:33:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:13,306 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-11-07 08:33:13,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-11-07 08:33:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:33:13,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:13,308 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:13,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:13,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:33:13,518 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:33:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:13,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1428751921, now seen corresponding path program 1 times [2021-11-07 08:33:13,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:13,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930636530] [2021-11-07 08:33:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:13,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 08:33:13,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:13,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930636530] [2021-11-07 08:33:13,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930636530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:13,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:13,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:13,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051906561] [2021-11-07 08:33:13,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:13,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:13,597 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2021-11-07 08:33:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:13,629 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-11-07 08:33:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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 41 [2021-11-07 08:33:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:13,631 INFO L225 Difference]: With dead ends: 110 [2021-11-07 08:33:13,631 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 08:33:13,632 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 [2021-11-07 08:33:13,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 08:33:13,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-11-07 08:33:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.1) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-07 08:33:13,642 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 41 [2021-11-07 08:33:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:13,642 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-07 08:33:13,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2021-11-07 08:33:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-07 08:33:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 08:33:13,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:13,643 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:13,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:33:13,643 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:33:13,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 755507507, now seen corresponding path program 1 times [2021-11-07 08:33:13,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:13,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054470288] [2021-11-07 08:33:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:13,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:14,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:14,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054470288] [2021-11-07 08:33:14,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054470288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:14,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78709783] [2021-11-07 08:33:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:14,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:14,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:14,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:33:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:33:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:14,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:33:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:14,894 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:33:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-07 08:33:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:14,917 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-07 08:33:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-11-07 08:33:14,934 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-07 08:33:14,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-07 08:33:15,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:15,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 08:33:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-07 08:33:15,522 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-11-07 08:33:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 282 treesize of output 161 [2021-11-07 08:33:15,589 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-11-07 08:33:15,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 266 treesize of output 174 [2021-11-07 08:33:15,627 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-07 08:33:15,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 188 [2021-11-07 08:33:15,959 INFO L354 Elim1Store]: treesize reduction 300, result has 16.2 percent of original size [2021-11-07 08:33:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 204 treesize of output 206 [2021-11-07 08:33:16,020 INFO L354 Elim1Store]: treesize reduction 220, result has 16.0 percent of original size [2021-11-07 08:33:16,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 191 treesize of output 127 [2021-11-07 08:33:16,877 INFO L354 Elim1Store]: treesize reduction 380, result has 13.4 percent of original size [2021-11-07 08:33:16,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 502 treesize of output 246 [2021-11-07 08:33:17,053 INFO L354 Elim1Store]: treesize reduction 832, result has 9.1 percent of original size [2021-11-07 08:33:17,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 497 treesize of output 371 [2021-11-07 08:33:17,091 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-11-07 08:33:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 356 treesize of output 384 [2021-11-07 08:33:18,913 INFO L354 Elim1Store]: treesize reduction 372, result has 13.1 percent of original size [2021-11-07 08:33:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 407 treesize of output 207 [2021-11-07 08:33:19,035 INFO L354 Elim1Store]: treesize reduction 860, result has 10.8 percent of original size [2021-11-07 08:33:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 361 treesize of output 333 [2021-11-07 08:33:35,396 INFO L354 Elim1Store]: treesize reduction 237, result has 9.2 percent of original size [2021-11-07 08:33:35,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 322 treesize of output 154 [2021-11-07 08:33:35,444 INFO L354 Elim1Store]: treesize reduction 149, result has 5.1 percent of original size [2021-11-07 08:33:35,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 133 treesize of output 113 [2021-11-07 08:33:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:35,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78709783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:35,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:35,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-11-07 08:33:35,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708532667] [2021-11-07 08:33:35,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:33:35,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:33:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:33:35,530 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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) [2021-11-07 08:33:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:38,794 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2021-11-07 08:33:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:33:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 41 [2021-11-07 08:33:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:38,795 INFO L225 Difference]: With dead ends: 131 [2021-11-07 08:33:38,796 INFO L226 Difference]: Without dead ends: 129 [2021-11-07 08:33:38,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:33:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-07 08:33:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2021-11-07 08:33:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-07 08:33:38,806 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 41 [2021-11-07 08:33:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:38,807 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-07 08:33:38,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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) [2021-11-07 08:33:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-07 08:33:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:33:38,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:38,808 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:38,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 08:33:39,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:39,017 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:33:39,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1699655007, now seen corresponding path program 1 times [2021-11-07 08:33:39,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:39,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519354184] [2021-11-07 08:33:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:39,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:39,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:39,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519354184] [2021-11-07 08:33:39,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519354184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:39,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630090479] [2021-11-07 08:33:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:39,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:39,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:39,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:39,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:33:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:40,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 08:33:40,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:40,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:33:40,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:40,542 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:33:40,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-11-07 08:33:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:40,562 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-07 08:33:40,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-11-07 08:33:40,578 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-07 08:33:40,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-11-07 08:33:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:40,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:40,668 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:33:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 83 [2021-11-07 08:33:40,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:40,688 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:33:40,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 77 [2021-11-07 08:33:41,123 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-11-07 08:33:41,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-11-07 08:33:41,174 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-11-07 08:33:41,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 253 treesize of output 161 [2021-11-07 08:33:41,201 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-11-07 08:33:41,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 159 [2021-11-07 08:33:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:41,518 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-07 08:33:41,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 172 treesize of output 122 [2021-11-07 08:33:41,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:41,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 08:33:41,528 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-07 08:33:41,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 149 [2021-11-07 08:33:42,086 INFO L354 Elim1Store]: treesize reduction 260, result has 15.3 percent of original size [2021-11-07 08:33:42,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 418 treesize of output 194 [2021-11-07 08:33:42,202 INFO L354 Elim1Store]: treesize reduction 552, result has 12.5 percent of original size [2021-11-07 08:33:42,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 386 treesize of output 256 [2021-11-07 08:33:42,228 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-11-07 08:33:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 241 treesize of output 269 [2021-11-07 08:33:42,662 INFO L354 Elim1Store]: treesize reduction 332, result has 14.4 percent of original size [2021-11-07 08:33:42,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 364 treesize of output 180 [2021-11-07 08:33:42,763 INFO L354 Elim1Store]: treesize reduction 788, result has 11.7 percent of original size [2021-11-07 08:33:42,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 318 treesize of output 290 [2021-11-07 08:33:45,576 INFO L354 Elim1Store]: treesize reduction 294, result has 8.4 percent of original size [2021-11-07 08:33:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 296 treesize of output 145 [2021-11-07 08:33:45,595 INFO L354 Elim1Store]: treesize reduction 116, result has 0.9 percent of original size [2021-11-07 08:33:45,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 76 [2021-11-07 08:33:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:45,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630090479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:45,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:45,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-07 08:33:45,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781606555] [2021-11-07 08:33:45,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:33:45,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:33:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:33:45,628 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:46,573 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2021-11-07 08:33:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:33:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:33:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:46,574 INFO L225 Difference]: With dead ends: 129 [2021-11-07 08:33:46,574 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 08:33:46,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:33:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 08:33:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2021-11-07 08:33:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 105 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2021-11-07 08:33:46,585 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 44 [2021-11-07 08:33:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:46,585 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2021-11-07 08:33:46,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:33:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2021-11-07 08:33:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:33:46,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:46,587 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:46,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:33:46,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:46,805 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 08:33:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1057023877, now seen corresponding path program 1 times [2021-11-07 08:33:46,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:46,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741712024] [2021-11-07 08:33:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:46,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:33:46,850 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:33:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:33:46,949 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:33:46,950 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:33:46,952 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,954 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,955 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,956 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 08:33:46,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:33:46,962 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:46,970 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:33:47,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:33:47 BoogieIcfgContainer [2021-11-07 08:33:47,032 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:33:47,032 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:33:47,032 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:33:47,033 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:33:47,033 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:03" (3/4) ... [2021-11-07 08:33:47,039 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 08:33:47,132 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/witness.graphml [2021-11-07 08:33:47,132 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:33:47,133 INFO L168 Benchmark]: Toolchain (without parser) took 164422.97 ms. Allocated memory was 94.4 MB in the beginning and 314.6 MB in the end (delta: 220.2 MB). Free memory was 72.3 MB in the beginning and 168.8 MB in the end (delta: -96.4 MB). Peak memory consumption was 122.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,134 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:33:47,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 590.21 ms. Allocated memory is still 94.4 MB. Free memory was 72.0 MB in the beginning and 60.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.32 ms. Allocated memory is still 94.4 MB. Free memory was 60.0 MB in the beginning and 57.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,135 INFO L168 Benchmark]: Boogie Preprocessor took 37.70 ms. Allocated memory is still 94.4 MB. Free memory was 57.9 MB in the beginning and 55.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,136 INFO L168 Benchmark]: RCFGBuilder took 568.13 ms. Allocated memory is still 94.4 MB. Free memory was 55.8 MB in the beginning and 38.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,136 INFO L168 Benchmark]: TraceAbstraction took 163068.24 ms. Allocated memory was 94.4 MB in the beginning and 314.6 MB in the end (delta: 220.2 MB). Free memory was 37.6 MB in the beginning and 171.9 MB in the end (delta: -134.3 MB). Peak memory consumption was 88.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,137 INFO L168 Benchmark]: Witness Printer took 100.02 ms. Allocated memory is still 314.6 MB. Free memory was 171.9 MB in the beginning and 168.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:33:47,139 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 590.21 ms. Allocated memory is still 94.4 MB. Free memory was 72.0 MB in the beginning and 60.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.32 ms. Allocated memory is still 94.4 MB. Free memory was 60.0 MB in the beginning and 57.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.70 ms. Allocated memory is still 94.4 MB. Free memory was 57.9 MB in the beginning and 55.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 568.13 ms. Allocated memory is still 94.4 MB. Free memory was 55.8 MB in the beginning and 38.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 163068.24 ms. Allocated memory was 94.4 MB in the beginning and 314.6 MB in the end (delta: 220.2 MB). Free memory was 37.6 MB in the beginning and 171.9 MB in the end (delta: -134.3 MB). Peak memory consumption was 88.7 MB. Max. memory is 16.1 GB. * Witness Printer took 100.02 ms. Allocated memory is still 314.6 MB. Free memory was 171.9 MB in the beginning and 168.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. 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 - CounterExampleResult [Line: 1049]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1001] SLL* item = head; [L1002] int status = 0; [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND TRUE !status [L1013] item->data = 1 [L1014] status = 1 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND TRUE status == 1 [L1018] item->data = 2 [L1019] status = 2 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND TRUE __VERIFIER_nondet_int() [L1006] item->next = malloc(sizeof(SLL)) [L1007] EXPR item->next [L1007] item->next->prev = item [L1008] EXPR item->next [L1008] item = item->next [L1009] item->next = ((void*)0) [L1011] COND FALSE !(!status) [L1016] COND FALSE !(status == 1) [L1021] COND TRUE status >= 2 [L1023] item->data = 3 [L1024] status = 3 [L1027] COND FALSE !(!(head != ((void*)0))) [L1028] COND FALSE !(!(item != ((void*)0))) [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1031] COND FALSE !(!(head != ((void*)0))) [L1032] COND FALSE !(status == 1) [L1037] COND FALSE !(status == 2) [L1043] COND TRUE status == 3 [L1045] COND FALSE !(!(head != ((void*)0))) [L1046] EXPR head->next [L1046] COND FALSE !(!(head->next != ((void*)0))) [L1047] EXPR head->next [L1047] EXPR head->next->next [L1047] COND FALSE !(!(head->next->next != ((void*)0))) [L1048] EXPR head->next [L1048] EXPR head->next->next [L1048] EXPR head->next->next->next [L1048] COND FALSE !(!(head->next->next->next != ((void*)0))) [L1049] EXPR head->next [L1049] EXPR head->next->next [L1049] EXPR head->next->next->next [L1049] EXPR head->next->next->next->data [L1049] COND TRUE !(head->next->next->next->data != 3) [L1049] reach_error() - UnprovableResult [Line: 1027]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1031]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1034]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1035]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1041]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1045]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1046]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1047]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1048]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1055]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 85 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 162.9s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 76.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1391 SDtfs, 2005 SDslu, 4631 SDs, 0 SdLazy, 2688 SolverSat, 255 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 64.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 471 GetRequests, 286 SyntacticMatches, 4 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 24.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=139occurred in iteration=12, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 409 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 74.9s InterpolantComputationTime, 860 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 785 ConstructedInterpolants, 116 QuantifiedInterpolants, 37856 SizeOfPredicates, 68 NumberOfNonLiveVariables, 1077 ConjunctsInSsa, 276 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 87/326 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 proved your program to be incorrect! [2021-11-07 08:33:47,354 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-07 08:33:47,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b36e512-6940-44c9-ab62-5d083c47833b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE