./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e62cc9109c388b2d044e23a78dff269f72cf5701 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e62cc9109c388b2d044e23a78dff269f72cf5701 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:40:30,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:40:30,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:40:30,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:40:30,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:40:30,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:40:30,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:40:30,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:40:30,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:40:30,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:40:30,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:40:30,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:40:30,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:40:30,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:40:30,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:40:30,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:40:30,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:40:30,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:40:30,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:40:30,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:40:30,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:40:30,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:40:30,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:40:30,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:40:30,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:40:30,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:40:30,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:40:30,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:40:30,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:40:30,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:40:30,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:40:30,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:40:30,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:40:30,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:40:30,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:40:30,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:40:30,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:40:30,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:40:30,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:40:30,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:40:30,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:40:30,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:40:30,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:40:30,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:40:30,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:40:30,418 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:40:30,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:40:30,425 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:40:30,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:40:30,426 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:40:30,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:40:30,426 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:40:30,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:40:30,428 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:40:30,428 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:40:30,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:40:30,429 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:40:30,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:40:30,430 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:40:30,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:40:30,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:40:30,431 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:40:30,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:40:30,431 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:40:30,431 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:40:30,432 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:40:30,432 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:40:30,432 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:40:30,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:40:30,434 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:40:30,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:40:30,435 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:40:30,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:40:30,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:40:30,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:40:30,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:40:30,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:40:30,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:40:30,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:40:30,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:40:30,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:40:30,437 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e62cc9109c388b2d044e23a78dff269f72cf5701 [2021-10-13 07:40:30,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:40:30,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:40:30,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:40:30,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:40:30,785 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:40:30,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-13 07:40:30,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/ec64c538a/23a92a98b95f4979a82b918209ef9570/FLAG78391077f [2021-10-13 07:40:31,380 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:40:31,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-13 07:40:31,393 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/ec64c538a/23a92a98b95f4979a82b918209ef9570/FLAG78391077f [2021-10-13 07:40:31,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/ec64c538a/23a92a98b95f4979a82b918209ef9570 [2021-10-13 07:40:31,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:40:31,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:40:31,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:40:31,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:40:31,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:40:31,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:40:31" (1/1) ... [2021-10-13 07:40:31,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4884e413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:31, skipping insertion in model container [2021-10-13 07:40:31,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:40:31" (1/1) ... [2021-10-13 07:40:31,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:40:31,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:40:32,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:40:32,087 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:40:32,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:40:32,201 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:40:32,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32 WrapperNode [2021-10-13 07:40:32,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:40:32,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:40:32,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:40:32,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:40:32,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:40:32,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:40:32,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:40:32,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:40:32,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,294 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:40:32,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:40:32,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:40:32,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:40:32,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (1/1) ... [2021-10-13 07:40:32,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:40:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:40:32,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:40:32,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:40:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:40:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:40:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:40:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:40:32,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:40:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:40:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:40:32,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:40:32,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:40:32,893 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 07:40:32,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:32 BoogieIcfgContainer [2021-10-13 07:40:32,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:40:32,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:40:32,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:40:32,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:40:32,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:40:31" (1/3) ... [2021-10-13 07:40:32,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204d7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:40:32, skipping insertion in model container [2021-10-13 07:40:32,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:32" (2/3) ... [2021-10-13 07:40:32,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204d7a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:40:32, skipping insertion in model container [2021-10-13 07:40:32,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:32" (3/3) ... [2021-10-13 07:40:32,905 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2021-10-13 07:40:32,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:40:32,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-10-13 07:40:32,953 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:40:32,959 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:40:32,959 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-13 07:40:32,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:40:32,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:32,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:40:32,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash 3879, now seen corresponding path program 1 times [2021-10-13 07:40:32,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:32,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705041692] [2021-10-13 07:40:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:32,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:33,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:33,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705041692] [2021-10-13 07:40:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705041692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:33,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:33,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:40:33,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939819868] [2021-10-13 07:40:33,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:40:33,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:33,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:40:33,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:40:33,202 INFO L87 Difference]: Start difference. First operand has 52 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:33,334 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-13 07:40:33,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:40:33,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-13 07:40:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:33,343 INFO L225 Difference]: With dead ends: 54 [2021-10-13 07:40:33,344 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 07:40:33,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:40:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 07:40:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-10-13 07:40:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-10-13 07:40:33,376 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 2 [2021-10-13 07:40:33,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:33,377 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-10-13 07:40:33,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,377 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-10-13 07:40:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:40:33,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:33,378 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:40:33,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:40:33,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash 3880, now seen corresponding path program 1 times [2021-10-13 07:40:33,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:33,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748177116] [2021-10-13 07:40:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:33,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:33,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:33,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748177116] [2021-10-13 07:40:33,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748177116] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:33,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:33,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:40:33,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834485135] [2021-10-13 07:40:33,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:40:33,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:40:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:40:33,484 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:33,601 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-10-13 07:40:33,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:40:33,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2021-10-13 07:40:33,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:33,606 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:40:33,606 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:40:33,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:40:33,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:40:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-10-13 07:40:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-13 07:40:33,619 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 2 [2021-10-13 07:40:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:33,619 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-13 07:40:33,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-13 07:40:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:40:33,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:33,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:33,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:40:33,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1730509016, now seen corresponding path program 1 times [2021-10-13 07:40:33,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:33,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749637913] [2021-10-13 07:40:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:33,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:33,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:33,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749637913] [2021-10-13 07:40:33,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749637913] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:33,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:33,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:40:33,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201003026] [2021-10-13 07:40:33,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:33,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:33,699 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:33,775 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-10-13 07:40:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:40:33,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-13 07:40:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:33,777 INFO L225 Difference]: With dead ends: 69 [2021-10-13 07:40:33,777 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 07:40:33,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:40:33,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 07:40:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2021-10-13 07:40:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-13 07:40:33,783 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 8 [2021-10-13 07:40:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-13 07:40:33,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-13 07:40:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:40:33,785 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:33,785 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:33,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:40:33,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:33,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1730507620, now seen corresponding path program 1 times [2021-10-13 07:40:33,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:33,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620306129] [2021-10-13 07:40:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:33,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:33,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:33,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620306129] [2021-10-13 07:40:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620306129] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:33,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:33,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:40:33,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190174664] [2021-10-13 07:40:33,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:33,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:33,843 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:33,944 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-10-13 07:40:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:40:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-13 07:40:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:33,948 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:40:33,948 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:40:33,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:40:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:40:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-10-13 07:40:33,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.7) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-10-13 07:40:33,969 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 8 [2021-10-13 07:40:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:33,969 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-10-13 07:40:33,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-10-13 07:40:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:40:33,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:33,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:33,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:40:33,971 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1730507621, now seen corresponding path program 1 times [2021-10-13 07:40:33,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:33,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83848310] [2021-10-13 07:40:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:33,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:34,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:34,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83848310] [2021-10-13 07:40:34,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83848310] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:34,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:34,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:40:34,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933401345] [2021-10-13 07:40:34,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:34,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:34,085 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:34,213 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-13 07:40:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:40:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-10-13 07:40:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:34,214 INFO L225 Difference]: With dead ends: 74 [2021-10-13 07:40:34,215 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 07:40:34,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:40:34,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 07:40:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2021-10-13 07:40:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 58 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-10-13 07:40:34,220 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 8 [2021-10-13 07:40:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:34,220 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-10-13 07:40:34,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-10-13 07:40:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:40:34,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:34,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:34,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:40:34,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash 866437451, now seen corresponding path program 1 times [2021-10-13 07:40:34,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:34,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742926973] [2021-10-13 07:40:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:34,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:34,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:34,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742926973] [2021-10-13 07:40:34,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742926973] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:34,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:34,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:40:34,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741161685] [2021-10-13 07:40:34,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:34,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:34,314 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:34,404 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-10-13 07:40:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:40:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:40:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:34,406 INFO L225 Difference]: With dead ends: 58 [2021-10-13 07:40:34,406 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 07:40:34,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 07:40:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-13 07:40:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2021-10-13 07:40:34,411 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 10 [2021-10-13 07:40:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:34,411 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2021-10-13 07:40:34,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2021-10-13 07:40:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:40:34,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:34,412 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:34,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:40:34,413 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1463010864, now seen corresponding path program 1 times [2021-10-13 07:40:34,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:34,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754668566] [2021-10-13 07:40:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:34,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:34,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:34,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754668566] [2021-10-13 07:40:34,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754668566] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:34,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:34,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 07:40:34,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555063438] [2021-10-13 07:40:34,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:40:34,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:40:34,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:40:34,619 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-10-13 07:40:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:34,777 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-10-13 07:40:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:40:34,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 [2021-10-13 07:40:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:34,779 INFO L225 Difference]: With dead ends: 63 [2021-10-13 07:40:34,779 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 07:40:34,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:40:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 07:40:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2021-10-13 07:40:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.525) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-10-13 07:40:34,784 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 12 [2021-10-13 07:40:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:34,785 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-10-13 07:40:34,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-10-13 07:40:34,785 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-10-13 07:40:34,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:40:34,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:34,786 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:34,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:40:34,786 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:34,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:34,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1462999879, now seen corresponding path program 1 times [2021-10-13 07:40:34,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:34,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291599724] [2021-10-13 07:40:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:34,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:34,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:34,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291599724] [2021-10-13 07:40:34,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291599724] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:34,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:34,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:40:34,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194830684] [2021-10-13 07:40:34,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:34,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:40:34,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:34,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:34,861 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 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) [2021-10-13 07:40:34,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:34,931 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-13 07:40:34,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:40:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-10-13 07:40:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:34,933 INFO L225 Difference]: With dead ends: 69 [2021-10-13 07:40:34,933 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 07:40:34,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:40:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 07:40:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-10-13 07:40:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 61 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) [2021-10-13 07:40:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2021-10-13 07:40:34,938 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 12 [2021-10-13 07:40:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:34,939 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2021-10-13 07:40:34,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2021-10-13 07:40:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2021-10-13 07:40:34,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:40:34,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:34,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:34,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:40:34,941 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1098836238, now seen corresponding path program 1 times [2021-10-13 07:40:34,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:40:34,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957886584] [2021-10-13 07:40:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:34,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:40:34,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:35,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:40:35,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957886584] [2021-10-13 07:40:35,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957886584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:40:35,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659750788] [2021-10-13 07:40:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:35,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:40:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:40:35,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:40:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:40:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:40:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:35,161 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-10-13 07:40:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 23 [2021-10-13 07:40:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:36,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659750788] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:40:36,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167378451] [2021-10-13 07:40:36,824 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-13 07:40:36,825 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:40:36,830 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:40:36,836 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:40:36,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:40:36,877 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,879 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:40:36,880 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:40:36,881 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:40:36,882 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,883 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:40:36,884 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 119 [2021-10-13 07:40:36,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:36,927 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 07:40:36,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 07:40:36,928 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,930 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:40:36,930 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,931 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-13 07:40:36,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:40:36,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:40:36,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,948 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:40:36,949 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 104 [2021-10-13 07:40:36,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:40:36,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:116, output treesize:104 [2021-10-13 07:40:36,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:37,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:40:37,175 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_44| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:40:37,178 INFO L168 Benchmark]: Toolchain (without parser) took 5489.31 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 93.5 MB in the beginning and 70.8 MB in the end (delta: 22.8 MB). Peak memory consumption was 50.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:37,179 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 92.3 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 41.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:40:37,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 513.31 ms. Allocated memory is still 127.9 MB. Free memory was 93.5 MB in the beginning and 97.5 MB in the end (delta: -4.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:37,180 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.39 ms. Allocated memory is still 127.9 MB. Free memory was 97.5 MB in the beginning and 95.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:37,180 INFO L168 Benchmark]: Boogie Preprocessor took 54.11 ms. Allocated memory is still 127.9 MB. Free memory was 95.5 MB in the beginning and 93.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:37,181 INFO L168 Benchmark]: RCFGBuilder took 566.31 ms. Allocated memory is still 127.9 MB. Free memory was 93.9 MB in the beginning and 77.7 MB in the end (delta: 16.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:37,181 INFO L168 Benchmark]: TraceAbstraction took 4279.23 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 77.3 MB in the beginning and 70.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:40:37,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 92.3 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 41.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 513.31 ms. Allocated memory is still 127.9 MB. Free memory was 93.5 MB in the beginning and 97.5 MB in the end (delta: -4.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.39 ms. Allocated memory is still 127.9 MB. Free memory was 97.5 MB in the beginning and 95.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.11 ms. Allocated memory is still 127.9 MB. Free memory was 95.5 MB in the beginning and 93.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 566.31 ms. Allocated memory is still 127.9 MB. Free memory was 93.9 MB in the beginning and 77.7 MB in the end (delta: 16.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4279.23 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 77.3 MB in the beginning and 70.8 MB in the end (delta: 6.6 MB). Peak memory consumption was 35.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_44| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_44|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:40:37,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:40:39,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:40:39,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:40:39,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:40:39,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:40:39,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:40:39,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:40:39,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:40:39,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:40:39,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:40:39,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:40:39,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:40:39,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:40:39,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:40:39,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:40:39,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:40:39,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:40:39,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:40:39,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:40:39,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:40:39,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:40:39,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:40:39,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:40:39,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:40:39,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:40:39,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:40:39,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:40:39,697 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:40:39,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:40:39,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:40:39,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:40:39,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:40:39,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:40:39,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:40:39,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:40:39,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:40:39,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:40:39,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:40:39,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:40:39,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:40:39,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:40:39,726 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:40:39,767 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:40:39,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:40:39,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:40:39,769 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:40:39,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:40:39,769 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:40:39,770 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:40:39,770 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:40:39,770 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:40:39,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:40:39,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:40:39,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:40:39,773 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:40:39,773 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:40:39,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:40:39,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:40:39,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:40:39,774 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:40:39,774 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:40:39,774 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:40:39,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:40:39,775 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:40:39,775 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:40:39,775 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:40:39,775 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:40:39,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:40:39,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:40:39,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:40:39,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:40:39,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:40:39,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:40:39,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:40:39,778 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:40:39,778 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:40:39,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:40:39,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:40:39,778 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e62cc9109c388b2d044e23a78dff269f72cf5701 [2021-10-13 07:40:40,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:40:40,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:40:40,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:40:40,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:40:40,187 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:40:40,188 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-13 07:40:40,248 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/fc5e57853/a575cb8e0d044aceb59ac4dc4f00b983/FLAG82b74fa21 [2021-10-13 07:40:40,906 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:40:40,909 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/sv-benchmarks/c/memsafety-ext/dll_extends_pointer.i [2021-10-13 07:40:40,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/fc5e57853/a575cb8e0d044aceb59ac4dc4f00b983/FLAG82b74fa21 [2021-10-13 07:40:41,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/data/fc5e57853/a575cb8e0d044aceb59ac4dc4f00b983 [2021-10-13 07:40:41,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:40:41,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:40:41,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:40:41,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:40:41,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:40:41,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c5bffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41, skipping insertion in model container [2021-10-13 07:40:41,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:40:41,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:40:41,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:40:41,604 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:40:41,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:40:41,701 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:40:41,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41 WrapperNode [2021-10-13 07:40:41,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:40:41,704 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:40:41,704 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:40:41,704 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:40:41,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:40:41,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:40:41,754 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:40:41,754 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:40:41,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:40:41,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:40:41,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:40:41,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:40:41,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (1/1) ... [2021-10-13 07:40:41,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:40:41,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:40:41,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:40:41,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:40:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:40:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:40:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:40:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:40:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:40:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:40:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:40:41,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:40:42,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:40:42,499 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 07:40:42,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:42 BoogieIcfgContainer [2021-10-13 07:40:42,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:40:42,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:40:42,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:40:42,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:40:42,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:40:41" (1/3) ... [2021-10-13 07:40:42,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b78d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:40:42, skipping insertion in model container [2021-10-13 07:40:42,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:40:41" (2/3) ... [2021-10-13 07:40:42,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76b78d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:40:42, skipping insertion in model container [2021-10-13 07:40:42,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:42" (3/3) ... [2021-10-13 07:40:42,509 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_extends_pointer.i [2021-10-13 07:40:42,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:40:42,515 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-10-13 07:40:42,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:40:42,565 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:40:42,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-13 07:40:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:40:42,617 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:42,618 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:40:42,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-13 07:40:42,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:42,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673039629] [2021-10-13 07:40:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:42,647 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:42,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:42,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:40:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:42,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:40:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:42,785 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 [2021-10-13 07:40:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:42,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:42,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:42,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673039629] [2021-10-13 07:40:42,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673039629] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:42,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:42,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:40:42,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142884149] [2021-10-13 07:40:42,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:40:42,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:40:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:40:42,835 INFO L87 Difference]: Start difference. First operand has 57 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 56 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:43,010 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-10-13 07:40:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:40:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-13 07:40:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:43,020 INFO L225 Difference]: With dead ends: 61 [2021-10-13 07:40:43,020 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 07:40:43,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:40:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 07:40:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-10-13 07:40:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-13 07:40:43,053 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 3 [2021-10-13 07:40:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:43,054 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-13 07:40:43,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-13 07:40:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:40:43,055 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:43,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:40:43,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:43,266 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-13 07:40:43,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:43,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726364490] [2021-10-13 07:40:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:43,268 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:43,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:43,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:40:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:40:43,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:43,326 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 [2021-10-13 07:40:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:43,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:43,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:43,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726364490] [2021-10-13 07:40:43,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726364490] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:43,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:43,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:40:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877947806] [2021-10-13 07:40:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:43,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:43,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:43,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:43,430 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-10-13 07:40:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:43,657 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-10-13 07:40:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:40:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-10-13 07:40:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:43,659 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:40:43,659 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 07:40:43,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 07:40:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-10-13 07:40:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-10-13 07:40:43,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 3 [2021-10-13 07:40:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:43,666 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-10-13 07:40:43,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-10-13 07:40:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-10-13 07:40:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:40:43,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:43,667 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:43,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:43,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:43,879 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1837114924, now seen corresponding path program 1 times [2021-10-13 07:40:43,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:43,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536664299] [2021-10-13 07:40:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:43,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:43,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:43,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:40:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:43,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:40:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:43,979 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 [2021-10-13 07:40:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:44,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:44,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:44,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536664299] [2021-10-13 07:40:44,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536664299] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:44,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:44,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:40:44,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469395606] [2021-10-13 07:40:44,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:44,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:44,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:44,076 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) 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) [2021-10-13 07:40:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:44,311 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-10-13 07:40:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:40:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) 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 [2021-10-13 07:40:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:44,313 INFO L225 Difference]: With dead ends: 56 [2021-10-13 07:40:44,313 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:40:44,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:40:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:40:44,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-10-13 07:40:44,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-10-13 07:40:44,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 9 [2021-10-13 07:40:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:44,320 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-10-13 07:40:44,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) 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) [2021-10-13 07:40:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-10-13 07:40:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:40:44,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:44,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:44,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:40:44,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:44,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1837114925, now seen corresponding path program 1 times [2021-10-13 07:40:44,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:44,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111083338] [2021-10-13 07:40:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:44,524 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:44,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:44,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:44,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:40:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:44,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:40:44,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:44,619 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 [2021-10-13 07:40:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:44,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:44,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:44,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111083338] [2021-10-13 07:40:44,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111083338] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:44,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:44,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:40:44,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157238851] [2021-10-13 07:40:44,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:40:44,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:40:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:40:44,982 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-10-13 07:40:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:45,347 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2021-10-13 07:40:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:40:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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 9 [2021-10-13 07:40:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:45,349 INFO L225 Difference]: With dead ends: 83 [2021-10-13 07:40:45,349 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 07:40:45,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:40:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 07:40:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-13 07:40:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.56) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-10-13 07:40:45,356 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2021-10-13 07:40:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:45,357 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-10-13 07:40:45,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 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) [2021-10-13 07:40:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-10-13 07:40:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:40:45,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:45,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:45,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:45,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:45,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1115986890, now seen corresponding path program 1 times [2021-10-13 07:40:45,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:45,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478491873] [2021-10-13 07:40:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:45,560 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:45,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:45,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:45,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:40:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:45,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:40:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:45,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:45,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:45,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478491873] [2021-10-13 07:40:45,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478491873] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:45,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:45,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:40:45,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609327565] [2021-10-13 07:40:45,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:40:45,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:40:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:40:45,722 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:45,876 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2021-10-13 07:40:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:40:45,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:40:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:45,878 INFO L225 Difference]: With dead ends: 87 [2021-10-13 07:40:45,878 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 07:40:45,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:40:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 07:40:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2021-10-13 07:40:45,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.52) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:45,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-10-13 07:40:45,885 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 10 [2021-10-13 07:40:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:45,885 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-10-13 07:40:45,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-10-13 07:40:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:40:45,886 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:45,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:45,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:46,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:46,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:46,098 INFO L82 PathProgramCache]: Analyzing trace with hash 236809714, now seen corresponding path program 1 times [2021-10-13 07:40:46,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:46,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62582346] [2021-10-13 07:40:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:46,099 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:46,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:46,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:40:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:46,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:40:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:46,258 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 [2021-10-13 07:40:46,264 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 [2021-10-13 07:40:46,355 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:40:46,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 30 [2021-10-13 07:40:46,364 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:40:46,364 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 27 treesize of output 23 [2021-10-13 07:40:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:48,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:48,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62582346] [2021-10-13 07:40:48,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62582346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:48,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:48,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:40:48,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831179447] [2021-10-13 07:40:48,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:40:48,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:40:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=17, Unknown=1, NotChecked=0, Total=30 [2021-10-13 07:40:48,818 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:55,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:55,517 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-13 07:40:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:40:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:40:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:55,519 INFO L225 Difference]: With dead ends: 64 [2021-10-13 07:40:55,519 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 07:40:55,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8267.1ms TimeCoverageRelationStatistics Valid=24, Invalid=30, Unknown=2, NotChecked=0, Total=56 [2021-10-13 07:40:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 07:40:55,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-10-13 07:40:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.48) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-10-13 07:40:55,524 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2021-10-13 07:40:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:55,525 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-10-13 07:40:55,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-10-13 07:40:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:40:55,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:55,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:55,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:55,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:55,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:55,731 INFO L82 PathProgramCache]: Analyzing trace with hash 657991070, now seen corresponding path program 1 times [2021-10-13 07:40:55,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:55,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316069131] [2021-10-13 07:40:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:55,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:55,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:55,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:40:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:40:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:56,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:56,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:56,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316069131] [2021-10-13 07:40:56,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316069131] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:56,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:56,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 07:40:56,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255816772] [2021-10-13 07:40:56,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:40:56,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:40:56,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:40:56,229 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 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) [2021-10-13 07:40:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:56,544 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-10-13 07:40:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:40:56,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 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 14 [2021-10-13 07:40:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:56,546 INFO L225 Difference]: With dead ends: 83 [2021-10-13 07:40:56,546 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 07:40:56,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:40:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 07:40:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-10-13 07:40:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 70 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) [2021-10-13 07:40:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2021-10-13 07:40:56,553 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 14 [2021-10-13 07:40:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:56,553 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2021-10-13 07:40:56,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 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) [2021-10-13 07:40:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2021-10-13 07:40:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:40:56,554 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:56,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:56,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:56,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:56,771 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash 657980085, now seen corresponding path program 1 times [2021-10-13 07:40:56,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:56,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467199250] [2021-10-13 07:40:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:56,776 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:56,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:56,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:56,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:40:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:40:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:56,929 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 13 treesize of output 9 [2021-10-13 07:40:56,941 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 15 treesize of output 11 [2021-10-13 07:40:57,110 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 19 treesize of output 7 [2021-10-13 07:40:57,121 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 21 treesize of output 9 [2021-10-13 07:40:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:57,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:57,403 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:57,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467199250] [2021-10-13 07:40:57,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467199250] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:57,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:57,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-13 07:40:57,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109927937] [2021-10-13 07:40:57,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:40:57,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:40:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:40:57,406 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-10-13 07:40:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:57,867 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-10-13 07:40:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:40:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 14 [2021-10-13 07:40:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:57,869 INFO L225 Difference]: With dead ends: 76 [2021-10-13 07:40:57,869 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 07:40:57,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:40:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 07:40:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-10-13 07:40:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:57,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-10-13 07:40:57,875 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 14 [2021-10-13 07:40:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:57,875 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-10-13 07:40:57,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-10-13 07:40:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-10-13 07:40:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:40:57,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:57,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:57,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:58,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:58,088 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -675555265, now seen corresponding path program 1 times [2021-10-13 07:40:58,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:58,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303832639] [2021-10-13 07:40:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:58,089 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:58,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:58,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:40:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:40:58,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:58,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 07:40:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:58,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:40:58,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303832639] [2021-10-13 07:40:58,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303832639] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:40:58,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:40:58,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:40:58,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251778111] [2021-10-13 07:40:58,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:40:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:40:58,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:40:58,632 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:40:59,018 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2021-10-13 07:40:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:40:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 07:40:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:40:59,020 INFO L225 Difference]: With dead ends: 75 [2021-10-13 07:40:59,020 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 07:40:59,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:40:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 07:40:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2021-10-13 07:40:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.411764705882353) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-13 07:40:59,025 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2021-10-13 07:40:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:40:59,025 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-13 07:40:59,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:40:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-13 07:40:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:40:59,026 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:40:59,026 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:40:59,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:40:59,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:40:59,227 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:40:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:40:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash -18664237, now seen corresponding path program 1 times [2021-10-13 07:40:59,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:40:59,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240017888] [2021-10-13 07:40:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:40:59,228 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:40:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:40:59,231 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:40:59,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-13 07:40:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:40:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:40:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:40:59,377 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 11 treesize of output 7 [2021-10-13 07:40:59,384 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 11 treesize of output 7 [2021-10-13 07:40:59,444 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:40:59,445 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 21 treesize of output 20 [2021-10-13 07:40:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:59,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:40:59,561 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-10-13 07:40:59,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 07:40:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:40:59,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:40:59,879 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 07:40:59,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 47 [2021-10-13 07:40:59,888 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:40:59,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 16 [2021-10-13 07:41:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:00,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:00,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:00,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240017888] [2021-10-13 07:41:00,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240017888] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:00,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453505228] [2021-10-13 07:41:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:00,194 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:00,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:00,204 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:00,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-13 07:41:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:41:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:00,477 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 11 treesize of output 7 [2021-10-13 07:41:00,485 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 11 treesize of output 7 [2021-10-13 07:41:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:41:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:41:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:00,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 07:41:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:00,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:41:01,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:01,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 57 treesize of output 41 [2021-10-13 07:41:01,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:01,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 32 treesize of output 16 [2021-10-13 07:41:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:01,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:01,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453505228] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:01,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660687005] [2021-10-13 07:41:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:01,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:01,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:01,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:01,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 07:41:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:41:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:01,445 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 11 treesize of output 7 [2021-10-13 07:41:01,453 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 11 treesize of output 7 [2021-10-13 07:41:01,490 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:41:01,490 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 21 treesize of output 20 [2021-10-13 07:41:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:01,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:41:01,560 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-10-13 07:41:01,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:41:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-10-13 07:41:01,781 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-13 07:41:01,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 47 [2021-10-13 07:41:01,790 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:41:01,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 16 [2021-10-13 07:41:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:01,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660687005] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:02,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:41:02,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 9, 6, 8, 6] total 14 [2021-10-13 07:41:02,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159751946] [2021-10-13 07:41:02,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:41:02,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:41:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:41:02,013 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:02,650 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-10-13 07:41:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:41:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:41:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:02,652 INFO L225 Difference]: With dead ends: 76 [2021-10-13 07:41:02,652 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 07:41:02,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 766.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:41:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 07:41:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-10-13 07:41:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.360655737704918) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:02,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-10-13 07:41:02,656 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 17 [2021-10-13 07:41:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:02,656 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-10-13 07:41:02,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-10-13 07:41:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:41:02,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:02,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:41:02,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:02,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:03,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:03,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:03,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:41:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:03,259 INFO L82 PathProgramCache]: Analyzing trace with hash -578592253, now seen corresponding path program 1 times [2021-10-13 07:41:03,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:03,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695810719] [2021-10-13 07:41:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:03,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:03,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:03,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:03,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:41:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:41:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:03,541 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-10-13 07:41:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 26 [2021-10-13 07:41:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:06,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:06,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:06,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695810719] [2021-10-13 07:41:06,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695810719] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:06,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885716586] [2021-10-13 07:41:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:06,196 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:06,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:06,199 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:06,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:41:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:41:06,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:06,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:06,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885716586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:06,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747857145] [2021-10-13 07:41:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:06,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:06,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:06,964 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:06,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:41:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:07,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:41:07,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:07,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:07,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747857145] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:07,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:41:07,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2021-10-13 07:41:07,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230877708] [2021-10-13 07:41:07,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:41:07,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:41:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:41:07,533 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) 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) [2021-10-13 07:41:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:08,438 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-10-13 07:41:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:41:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) 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 18 [2021-10-13 07:41:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:08,439 INFO L225 Difference]: With dead ends: 76 [2021-10-13 07:41:08,439 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 07:41:08,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 388.8ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:41:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 07:41:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-10-13 07:41:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 62 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) [2021-10-13 07:41:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-10-13 07:41:08,443 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 18 [2021-10-13 07:41:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:08,444 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-10-13 07:41:08,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) 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) [2021-10-13 07:41:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-10-13 07:41:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:41:08,445 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:08,445 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:41:08,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:08,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:08,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:09,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:09,048 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:41:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:09,051 INFO L82 PathProgramCache]: Analyzing trace with hash -952974365, now seen corresponding path program 1 times [2021-10-13 07:41:09,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:09,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081396002] [2021-10-13 07:41:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:09,062 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:09,063 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:09,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:41:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:09,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:41:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:09,404 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 13 treesize of output 9 [2021-10-13 07:41:09,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:41:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:09,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:09,712 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:09,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081396002] [2021-10-13 07:41:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081396002] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:09,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:41:09,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-13 07:41:09,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659173333] [2021-10-13 07:41:09,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:41:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:41:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:41:09,714 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) 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) [2021-10-13 07:41:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:10,290 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-10-13 07:41:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:41:10,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) 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 21 [2021-10-13 07:41:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:10,292 INFO L225 Difference]: With dead ends: 81 [2021-10-13 07:41:10,292 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 07:41:10,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:41:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 07:41:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2021-10-13 07:41:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-13 07:41:10,296 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2021-10-13 07:41:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:10,296 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-13 07:41:10,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) 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) [2021-10-13 07:41:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-13 07:41:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:41:10,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:10,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:41:10,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:10,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:10,503 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:41:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:10,503 INFO L82 PathProgramCache]: Analyzing trace with hash 522565856, now seen corresponding path program 1 times [2021-10-13 07:41:10,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:10,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540207964] [2021-10-13 07:41:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:10,504 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:10,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:10,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:10,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:41:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:41:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:11,059 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 17 treesize of output 13 [2021-10-13 07:41:11,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:41:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:11,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:11,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:11,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540207964] [2021-10-13 07:41:11,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540207964] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:41:11,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:41:11,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 12 [2021-10-13 07:41:11,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714521240] [2021-10-13 07:41:11,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:41:11,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:41:11,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-13 07:41:11,734 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:13,065 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-10-13 07:41:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:41:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 07:41:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:13,067 INFO L225 Difference]: With dead ends: 80 [2021-10-13 07:41:13,067 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 07:41:13,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-10-13 07:41:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 07:41:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2021-10-13 07:41:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2021-10-13 07:41:13,070 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 22 [2021-10-13 07:41:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:13,070 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2021-10-13 07:41:13,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2021-10-13 07:41:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:41:13,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:13,072 INFO L512 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] [2021-10-13 07:41:13,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:13,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:13,272 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:41:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:13,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1402337693, now seen corresponding path program 1 times [2021-10-13 07:41:13,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:13,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168964055] [2021-10-13 07:41:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:13,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:13,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:13,275 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:13,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 07:41:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:41:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:13,669 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 [2021-10-13 07:41:13,714 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:41:13,714 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 17 treesize of output 17 [2021-10-13 07:41:13,738 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 11 treesize of output 7 [2021-10-13 07:41:13,786 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:41:13,787 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-13 07:41:13,918 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:41:13,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 45 [2021-10-13 07:41:14,250 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:41:14,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 26 [2021-10-13 07:41:14,397 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:41:14,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-10-13 07:41:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:14,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:14,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:14,854 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 60 treesize of output 64 [2021-10-13 07:41:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:15,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:15,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168964055] [2021-10-13 07:41:15,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168964055] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:15,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [378797699] [2021-10-13 07:41:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:15,001 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:15,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:15,002 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:15,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-13 07:41:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:15,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:41:15,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:15,455 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 [2021-10-13 07:41:15,495 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:41:15,495 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 15 treesize of output 15 [2021-10-13 07:41:15,542 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 11 treesize of output 7 [2021-10-13 07:41:15,638 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:41:15,639 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-13 07:41:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:15,762 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-13 07:41:15,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 45 [2021-10-13 07:41:16,168 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:41:16,170 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 50 treesize of output 27 [2021-10-13 07:41:16,296 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:41:16,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 27 [2021-10-13 07:41:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:16,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:16,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:16,659 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 60 treesize of output 64 [2021-10-13 07:41:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:16,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [378797699] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:16,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919175236] [2021-10-13 07:41:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:16,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:16,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:16,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 07:41:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:17,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:41:17,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:17,172 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 [2021-10-13 07:41:17,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:41:17,220 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 15 treesize of output 15 [2021-10-13 07:41:17,233 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 11 treesize of output 7 [2021-10-13 07:41:17,277 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:41:17,278 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-13 07:41:17,372 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:41:17,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 47 [2021-10-13 07:41:17,574 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:41:17,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 26 [2021-10-13 07:41:17,653 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:41:17,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 26 [2021-10-13 07:41:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:17,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:18,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:18,006 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 60 treesize of output 64 [2021-10-13 07:41:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:18,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919175236] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:18,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:41:18,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 21 [2021-10-13 07:41:18,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863575384] [2021-10-13 07:41:18,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:41:18,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:41:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:41:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:41:18,187 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:42,657 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-10-13 07:41:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 07:41:42,658 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 07:41:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:42,659 INFO L225 Difference]: With dead ends: 105 [2021-10-13 07:41:42,659 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:41:42,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 25 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 3409.4ms TimeCoverageRelationStatistics Valid=477, Invalid=1779, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 07:41:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:41:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-10-13 07:41:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 67 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) [2021-10-13 07:41:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-10-13 07:41:42,663 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 23 [2021-10-13 07:41:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:42,664 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-10-13 07:41:42,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-10-13 07:41:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:41:42,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:42,665 INFO L512 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] [2021-10-13 07:41:42,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:42,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 07:41:43,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-10-13 07:41:43,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:43,266 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:41:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1402337692, now seen corresponding path program 1 times [2021-10-13 07:41:43,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:43,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040191763] [2021-10-13 07:41:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:43,267 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:43,268 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:43,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:41:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:43,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:41:43,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:43,686 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 [2021-10-13 07:41:43,692 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 [2021-10-13 07:41:43,802 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:41:43,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-13 07:41:43,820 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:41:43,821 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 16 treesize of output 16 [2021-10-13 07:41:43,859 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 11 treesize of output 7 [2021-10-13 07:41:43,866 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 11 treesize of output 7 [2021-10-13 07:41:43,940 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:41:43,940 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 07:41:43,957 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 07:41:43,957 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 55 treesize of output 50 [2021-10-13 07:41:44,085 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 07:41:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2021-10-13 07:41:44,118 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-13 07:41:44,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 71 treesize of output 73 [2021-10-13 07:41:44,444 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 07:41:44,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 86 treesize of output 64 [2021-10-13 07:41:44,468 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:41:44,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 30 [2021-10-13 07:41:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:44,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:51,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:51,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040191763] [2021-10-13 07:41:51,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040191763] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:51,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493087130] [2021-10-13 07:41:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:51,245 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:51,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:51,246 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-13 07:41:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:51,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 07:41:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:51,809 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 [2021-10-13 07:41:51,817 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 [2021-10-13 07:41:51,917 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:41:51,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-13 07:41:51,936 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:41:51,936 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 16 treesize of output 16 [2021-10-13 07:41:52,032 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 11 treesize of output 7 [2021-10-13 07:41:52,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:41:52,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 07:41:52,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 07:41:52,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:52,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:52,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:52,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 77 [2021-10-13 07:41:52,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:52,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:41:52,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:52,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 64 [2021-10-13 07:41:52,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:52,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 80 treesize of output 55 [2021-10-13 07:41:52,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:41:52,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 43 treesize of output 27 [2021-10-13 07:41:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:52,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:02,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1493087130] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:02,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174059438] [2021-10-13 07:42:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:42:02,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:02,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:02,125 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 07:42:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:42:02,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:42:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:02,623 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 [2021-10-13 07:42:02,634 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 [2021-10-13 07:42:02,728 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:42:02,728 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 15 treesize of output 15 [2021-10-13 07:42:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:42:02,772 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 11 treesize of output 7 [2021-10-13 07:42:02,788 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 11 treesize of output 7 [2021-10-13 07:42:02,854 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:42:02,854 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 07:42:02,879 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 07:42:02,880 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 55 treesize of output 50 [2021-10-13 07:42:03,020 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 07:42:03,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 68 [2021-10-13 07:42:03,069 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-13 07:42:03,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 71 treesize of output 73 [2021-10-13 07:42:03,317 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 07:42:03,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 86 treesize of output 64 [2021-10-13 07:42:03,326 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:42:03,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 30 [2021-10-13 07:42:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:03,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:06,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174059438] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:06,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:06,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10, 9, 10, 9] total 26 [2021-10-13 07:42:06,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948318878] [2021-10-13 07:42:06,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 07:42:06,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:06,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 07:42:06,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=570, Unknown=3, NotChecked=0, Total=702 [2021-10-13 07:42:06,981 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:43:12,429 WARN L207 SmtUtils]: Spent 41.66 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-10-13 07:44:41,533 WARN L207 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-10-13 07:45:25,377 WARN L207 SmtUtils]: Spent 19.31 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-10-13 07:45:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:39,567 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-10-13 07:45:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 07:45:39,568 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 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 23 [2021-10-13 07:45:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:39,569 INFO L225 Difference]: With dead ends: 109 [2021-10-13 07:45:39,569 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 07:45:39,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 181957.1ms TimeCoverageRelationStatistics Valid=755, Invalid=1992, Unknown=9, NotChecked=0, Total=2756 [2021-10-13 07:45:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 07:45:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2021-10-13 07:45:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.4) internal successors, (84), 70 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) [2021-10-13 07:45:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-10-13 07:45:39,576 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 23 [2021-10-13 07:45:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:39,576 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-10-13 07:45:39,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-10-13 07:45:39,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:45:39,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:39,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:39,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:39,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:39,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:40,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:40,191 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:45:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash -980327547, now seen corresponding path program 1 times [2021-10-13 07:45:40,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:40,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54741930] [2021-10-13 07:45:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:40,192 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:40,193 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:40,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-13 07:45:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:45:40,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:40,726 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 [2021-10-13 07:45:40,759 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 24 treesize of output 20 [2021-10-13 07:45:40,947 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 24 treesize of output 16 [2021-10-13 07:45:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:40,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:41,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:41,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54741930] [2021-10-13 07:45:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54741930] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:45:41,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:45:41,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-13 07:45:41,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404689132] [2021-10-13 07:45:41,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:45:41,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:41,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:45:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:45:41,194 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 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) [2021-10-13 07:45:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:45:41,964 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-10-13 07:45:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:45:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 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 23 [2021-10-13 07:45:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:45:41,966 INFO L225 Difference]: With dead ends: 71 [2021-10-13 07:45:41,966 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 07:45:41,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:45:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 07:45:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-13 07:45:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:45:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-10-13 07:45:41,970 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 23 [2021-10-13 07:45:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:45:41,970 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-10-13 07:45:41,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 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) [2021-10-13 07:45:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-10-13 07:45:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:45:41,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:45:41,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:45:41,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:45:42,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:45:42,173 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:45:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:45:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash -522796429, now seen corresponding path program 1 times [2021-10-13 07:45:42,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:45:42,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611188837] [2021-10-13 07:45:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:42,174 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:45:42,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:45:42,176 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:45:42,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:45:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:45:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:42,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:45:43,027 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:45:43,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 07:45:43,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:45:43,180 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:45:43,181 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-13 07:45:43,369 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:45:43,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-10-13 07:45:43,613 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:45:43,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 21 [2021-10-13 07:45:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:43,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:54,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:45:54,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611188837] [2021-10-13 07:45:54,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611188837] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:54,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839226105] [2021-10-13 07:45:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:54,199 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:45:54,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:45:54,200 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:45:54,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:45:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:45:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:55,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:45:55,274 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:45:55,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-13 07:45:55,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:45:55,456 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:45:55,456 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-13 07:45:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:45:55,639 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-13 07:45:55,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 40 [2021-10-13 07:45:55,983 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:45:55,983 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 44 treesize of output 21 [2021-10-13 07:45:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:56,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:57,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839226105] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:57,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271351597] [2021-10-13 07:45:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:45:57,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:45:57,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:45:57,356 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:45:57,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:45:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:45:58,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:45:58,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:45:58,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 07:45:58,217 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:45:58,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 07:45:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:45:58,275 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:45:58,275 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-10-13 07:45:58,399 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:45:58,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 40 [2021-10-13 07:45:58,563 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:45:58,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 21 [2021-10-13 07:45:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:45:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271351597] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:59,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:45:59,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 21 [2021-10-13 07:45:59,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148360906] [2021-10-13 07:45:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 07:45:59,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 07:45:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=344, Unknown=3, NotChecked=0, Total=420 [2021-10-13 07:45:59,831 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:46:13,887 WARN L207 SmtUtils]: Spent 7.36 s on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-10-13 07:46:38,119 WARN L207 SmtUtils]: Spent 10.15 s on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-10-13 07:46:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:46:50,481 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-10-13 07:46:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 07:46:50,482 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 24 [2021-10-13 07:46:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:46:50,483 INFO L225 Difference]: With dead ends: 73 [2021-10-13 07:46:50,483 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 07:46:50,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 47299.7ms TimeCoverageRelationStatistics Valid=201, Invalid=658, Unknown=11, NotChecked=0, Total=870 [2021-10-13 07:46:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 07:46:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-10-13 07:46:50,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 60 states have (on average 1.35) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:46:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-10-13 07:46:50,486 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 24 [2021-10-13 07:46:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:46:50,486 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-10-13 07:46:50,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:46:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-10-13 07:46:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:46:50,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:46:50,488 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:46:50,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-10-13 07:46:50,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 07:46:50,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 07:46:51,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:46:51,092 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:46:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:46:51,092 INFO L82 PathProgramCache]: Analyzing trace with hash 973208805, now seen corresponding path program 1 times [2021-10-13 07:46:51,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:46:51,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577734485] [2021-10-13 07:46:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:46:51,093 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:46:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:46:51,095 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:46:51,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:46:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:46:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:46:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:46:51,698 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 [2021-10-13 07:46:51,709 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 [2021-10-13 07:46:51,843 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:46:51,843 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 15 treesize of output 15 [2021-10-13 07:46:51,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:46:51,935 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 11 treesize of output 7 [2021-10-13 07:46:51,950 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 11 treesize of output 7 [2021-10-13 07:46:52,041 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 07:46:52,041 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 57 [2021-10-13 07:46:52,067 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 07:46:52,068 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2021-10-13 07:46:52,267 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-13 07:46:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2021-10-13 07:46:52,321 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-13 07:46:52,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 80 [2021-10-13 07:46:52,790 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 07:46:52,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 71 [2021-10-13 07:46:52,802 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:46:52,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 30 [2021-10-13 07:46:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:46:53,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:46:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:46:57,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:46:57,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577734485] [2021-10-13 07:46:57,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577734485] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:46:57,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085220838] [2021-10-13 07:46:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:46:57,940 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:46:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:46:57,942 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:46:57,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:46:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:46:58,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 07:46:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:46:58,792 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 [2021-10-13 07:46:58,803 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 [2021-10-13 07:46:58,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:46:58,901 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 16 treesize of output 16 [2021-10-13 07:46:58,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:46:59,050 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 11 treesize of output 7 [2021-10-13 07:46:59,060 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 11 treesize of output 7 [2021-10-13 07:46:59,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 07:46:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 07:46:59,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:46:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:46:59,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:59,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2021-10-13 07:46:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:46:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:46:59,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:46:59,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 73 [2021-10-13 07:47:00,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:00,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 50 [2021-10-13 07:47:00,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:47:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 22 [2021-10-13 07:47:00,508 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 16 treesize of output 15 [2021-10-13 07:47:00,936 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:47:00,936 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 27 treesize of output 23 [2021-10-13 07:47:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:01,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:03,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-10-13 07:47:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:17,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2085220838] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:17,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417441712] [2021-10-13 07:47:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:17,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:47:17,269 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:47:17,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:47:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:47:18,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:18,020 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 [2021-10-13 07:47:18,028 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 [2021-10-13 07:47:18,163 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:47:18,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-10-13 07:47:18,197 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:47:18,197 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 15 treesize of output 15 [2021-10-13 07:47:18,228 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 11 treesize of output 7 [2021-10-13 07:47:18,239 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 11 treesize of output 7 [2021-10-13 07:47:18,299 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:47:18,299 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 07:47:18,331 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 07:47:18,331 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 55 treesize of output 50 [2021-10-13 07:47:18,520 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-10-13 07:47:18,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2021-10-13 07:47:18,579 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-10-13 07:47:18,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 80 [2021-10-13 07:47:18,855 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-13 07:47:18,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 71 [2021-10-13 07:47:18,882 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:47:18,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 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 [2021-10-13 07:47:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:19,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:22,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417441712] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:47:22,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:47:22,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 14, 12, 11, 10] total 39 [2021-10-13 07:47:22,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780499061] [2021-10-13 07:47:22,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 07:47:22,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 07:47:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1335, Unknown=5, NotChecked=0, Total=1560 [2021-10-13 07:47:22,684 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 40 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) [2021-10-13 07:47:35,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:47:35,695 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-10-13 07:47:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 07:47:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 40 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) Word has length 25 [2021-10-13 07:47:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:47:35,697 INFO L225 Difference]: With dead ends: 116 [2021-10-13 07:47:35,697 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 07:47:35,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 31442.6ms TimeCoverageRelationStatistics Valid=1055, Invalid=3632, Unknown=5, NotChecked=0, Total=4692 [2021-10-13 07:47:35,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 07:47:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2021-10-13 07:47:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.3289473684210527) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:47:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-10-13 07:47:35,703 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 25 [2021-10-13 07:47:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:47:35,704 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-10-13 07:47:35,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 40 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) [2021-10-13 07:47:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-10-13 07:47:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:47:35,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:47:35,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:47:35,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-13 07:47:35,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:36,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 07:47:36,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:47:36,310 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:47:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:47:36,311 INFO L82 PathProgramCache]: Analyzing trace with hash 839765447, now seen corresponding path program 1 times [2021-10-13 07:47:36,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:47:36,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629844376] [2021-10-13 07:47:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:47:36,311 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:47:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:47:36,312 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:47:36,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:47:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:47:37,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:47:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:47:37,039 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 [2021-10-13 07:47:37,098 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:47:37,098 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 15 treesize of output 15 [2021-10-13 07:47:37,137 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 18 treesize of output 14 [2021-10-13 07:47:37,368 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 16 treesize of output 8 [2021-10-13 07:47:37,453 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:47:37,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 24 [2021-10-13 07:47:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:37,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:47:37,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 07:47:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:47:37,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:47:37,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629844376] [2021-10-13 07:47:37,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629844376] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:47:37,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:47:37,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-13 07:47:37,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266924465] [2021-10-13 07:47:37,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:47:37,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:47:37,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:47:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:47:37,990 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:48:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:48:11,410 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-10-13 07:48:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 07:48:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 07:48:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:48:11,411 INFO L225 Difference]: With dead ends: 96 [2021-10-13 07:48:11,411 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 07:48:11,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-13 07:48:11,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 07:48:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2021-10-13 07:48:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:48:11,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-10-13 07:48:11,416 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 26 [2021-10-13 07:48:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:48:11,416 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-10-13 07:48:11,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:48:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-10-13 07:48:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:48:11,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:48:11,418 INFO L512 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] [2021-10-13 07:48:11,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 07:48:11,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:48:11,645 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:48:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:48:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1834274759, now seen corresponding path program 1 times [2021-10-13 07:48:11,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:48:11,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385982162] [2021-10-13 07:48:11,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:48:11,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:48:11,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:48:11,647 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:48:11,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 07:48:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:48:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:48:12,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:48:12,429 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 [2021-10-13 07:48:12,573 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:48:12,573 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 16 treesize of output 16 [2021-10-13 07:48:12,621 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 11 treesize of output 7 [2021-10-13 07:48:12,702 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:48:12,702 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 07:48:12,864 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:48:12,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-10-13 07:48:13,181 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:48:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 20 [2021-10-13 07:48:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:48:13,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:48:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:48:28,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:48:28,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385982162] [2021-10-13 07:48:28,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385982162] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:48:28,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466062695] [2021-10-13 07:48:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:48:28,991 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:48:28,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:48:28,991 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:48:28,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-13 07:48:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:48:30,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 07:48:30,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:48:30,036 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 [2021-10-13 07:48:30,113 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:48:30,113 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 16 treesize of output 16 [2021-10-13 07:48:30,211 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 11 treesize of output 7 [2021-10-13 07:48:30,362 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:48:30,362 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 07:48:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:48:30,573 INFO L354 Elim1Store]: treesize reduction 49, result has 15.5 percent of original size [2021-10-13 07:48:30,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-10-13 07:48:30,980 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:48:30,980 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 43 treesize of output 20 [2021-10-13 07:48:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:48:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:48:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:48:33,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466062695] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:48:33,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800347801] [2021-10-13 07:48:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:48:33,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:48:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:48:33,418 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:48:33,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 07:48:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:48:34,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:48:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:48:34,401 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 [2021-10-13 07:48:34,488 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:48:34,488 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 15 treesize of output 15 [2021-10-13 07:48:34,510 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 11 treesize of output 7 [2021-10-13 07:48:34,560 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-13 07:48:34,561 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 07:48:34,671 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:48:34,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-10-13 07:48:34,877 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-13 07:48:34,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 20 [2021-10-13 07:48:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:48:34,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:48:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:48:35,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800347801] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:48:35,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:48:35,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 21 [2021-10-13 07:48:35,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3914099] [2021-10-13 07:48:35,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 07:48:35,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:48:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 07:48:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=382, Unknown=3, NotChecked=0, Total=462 [2021-10-13 07:48:35,413 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:48:40,085 WARN L838 $PredicateComparison]: unable to prove that (and (bvult c_ULTIMATE.start_main_~list~0.base |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~y~0.base)) (_ bv1 1))) (forall ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset) c_ULTIMATE.start_main_~y~0.base)) c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset) |c_#StackHeapBarrier|)) (bvult (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) |c_#StackHeapBarrier|) (bvult c_ULTIMATE.start_main_~y~0.base |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (_ bv1 1)))) is different from false [2021-10-13 07:49:09,082 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base))) (let ((.cse0 (select .cse1 c_ULTIMATE.start_main_~y~0.offset))) (and (bvult c_ULTIMATE.start_main_~list~0.base |c_#StackHeapBarrier|) (forall ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset) c_ULTIMATE.start_main_~y~0.base)) c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset) |c_#StackHeapBarrier|)) (exists ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset)) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset)) c_ULTIMATE.start_main_~y~0.base)) (bvult .cse0 |c_#StackHeapBarrier|) (= (select .cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~y~0.offset)) c_ULTIMATE.start_main_~y~0.base) (= c_ULTIMATE.start_main_~y~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~y~0.base .cse0)) (bvult c_ULTIMATE.start_main_~y~0.base |c_#StackHeapBarrier|)))) is different from false [2021-10-13 07:49:19,448 WARN L838 $PredicateComparison]: unable to prove that (and (bvult c_ULTIMATE.start_main_~list~0.base |c_#StackHeapBarrier|) (forall ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset) c_ULTIMATE.start_main_~y~0.base)) c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset) |c_#StackHeapBarrier|)) (bvult c_ULTIMATE.start_main_~y~0.base |c_#StackHeapBarrier|)) is different from false [2021-10-13 07:49:21,929 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base)) (.cse0 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base))) (let ((.cse1 (select .cse0 (_ bv0 32))) (.cse2 (select .cse3 c_ULTIMATE.start_main_~y~0.offset))) (and (bvult c_ULTIMATE.start_main_~list~0.base |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_main_~y~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_main_~list~0.base (select .cse0 (_ bv8 32))) (forall ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset) c_ULTIMATE.start_main_~y~0.base)) c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset) |c_#StackHeapBarrier|)) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (bvult .cse1 |c_#StackHeapBarrier|) (exists ((ULTIMATE.start_main_~list~0.offset (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) c_ULTIMATE.start_main_~y~0.offset)) (bvadd (_ bv4 32) ULTIMATE.start_main_~list~0.offset)) c_ULTIMATE.start_main_~y~0.base)) (bvult .cse2 |c_#StackHeapBarrier|) (exists ((v_ULTIMATE.start_main_~list~0.offset_112 (_ BitVec 32))) (= c_ULTIMATE.start_main_~list~0.base (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base) (_ bv0 32))) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~list~0.offset_112)))) (= (select .cse3 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~y~0.offset)) c_ULTIMATE.start_main_~y~0.base) (= c_ULTIMATE.start_main_~y~0.offset (_ bv0 32)) (not (= c_ULTIMATE.start_main_~list~0.base .cse1)) (not (= c_ULTIMATE.start_main_~y~0.base .cse2)) (bvult c_ULTIMATE.start_main_~y~0.base |c_#StackHeapBarrier|) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~list~0.base))) (_ bv1 1)))))) is different from false [2021-10-13 07:49:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:34,069 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2021-10-13 07:49:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 07:49:34,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 [2021-10-13 07:49:34,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:34,072 INFO L225 Difference]: With dead ends: 191 [2021-10-13 07:49:34,072 INFO L226 Difference]: Without dead ends: 191 [2021-10-13 07:49:34,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 59866.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1857, Unknown=18, NotChecked=388, Total=2756 [2021-10-13 07:49:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-10-13 07:49:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 163. [2021-10-13 07:49:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 152 states have (on average 1.2894736842105263) internal successors, (196), 162 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 196 transitions. [2021-10-13 07:49:34,080 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 196 transitions. Word has length 28 [2021-10-13 07:49:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 196 transitions. [2021-10-13 07:49:34,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:49:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 196 transitions. [2021-10-13 07:49:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:49:34,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:34,082 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:49:34,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:34,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:34,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:34,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:49:34,683 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 23 more)] === [2021-10-13 07:49:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1834263774, now seen corresponding path program 1 times [2021-10-13 07:49:34,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:49:34,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332106624] [2021-10-13 07:49:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:49:34,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:49:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:49:34,684 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:49:34,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 07:49:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:49:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 07:49:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:49:35,628 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 [2021-10-13 07:49:35,690 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 13 treesize of output 9 [2021-10-13 07:49:35,703 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 15 treesize of output 11 [2021-10-13 07:49:35,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:49:35,831 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 15 treesize of output 15 [2021-10-13 07:49:35,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:49:35,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-13 07:49:36,029 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-13 07:49:36,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 57 [2021-10-13 07:49:36,061 INFO L354 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2021-10-13 07:49:36,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 69 [2021-10-13 07:49:36,299 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-10-13 07:49:36,300 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 6 case distinctions, treesize of input 91 treesize of output 80 [2021-10-13 07:49:36,400 INFO L354 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2021-10-13 07:49:36,401 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 6 case distinctions, treesize of input 88 treesize of output 93 [2021-10-13 07:49:38,115 INFO L354 Elim1Store]: treesize reduction 118, result has 2.5 percent of original size [2021-10-13 07:49:38,115 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 74 [2021-10-13 07:49:38,151 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-13 07:49:38,151 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 65 treesize of output 36 [2021-10-13 07:49:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:49:38,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:49:46,268 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_main_~y~0.offset (_ BitVec 32))) (let ((.cse4 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse1 (let ((.cse6 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.base)))) (store .cse6 c_ULTIMATE.start_main_~list~0.base (store (select .cse6 c_ULTIMATE.start_main_~list~0.base) .cse4 c_ULTIMATE.start_main_~y~0.base)))) (.cse5 (bvadd (_ bv8 32) ULTIMATE.start_main_~y~0.offset))) (let ((.cse2 (store (select .cse1 c_ULTIMATE.start_main_~y~0.base) .cse5 c_ULTIMATE.start_main_~y~0.base))) (let ((.cse0 (select .cse2 ULTIMATE.start_main_~y~0.offset))) (= .cse0 (select (select (store .cse1 c_ULTIMATE.start_main_~y~0.base .cse2) .cse0) (bvadd (_ bv8 32) (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.offset)))) (store .cse3 c_ULTIMATE.start_main_~list~0.base (store (select .cse3 c_ULTIMATE.start_main_~list~0.base) .cse4 ULTIMATE.start_main_~y~0.offset))) c_ULTIMATE.start_main_~y~0.base) .cse5 (bvadd ULTIMATE.start_main_~y~0.offset (_ bv12 32))) ULTIMATE.start_main_~y~0.offset))))))))) (forall ((ULTIMATE.start_main_~y~0.offset (_ BitVec 32))) (let ((.cse10 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))) (let ((.cse7 (let ((.cse13 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.offset)))) (store .cse13 c_ULTIMATE.start_main_~list~0.base (store (select .cse13 c_ULTIMATE.start_main_~list~0.base) .cse10 ULTIMATE.start_main_~y~0.offset)))) (.cse11 (bvadd (_ bv8 32) ULTIMATE.start_main_~y~0.offset))) (let ((.cse8 (store (select .cse7 c_ULTIMATE.start_main_~y~0.base) .cse11 (bvadd ULTIMATE.start_main_~y~0.offset (_ bv12 32))))) (let ((.cse12 (select .cse8 ULTIMATE.start_main_~y~0.offset))) (= (select (select (store .cse7 c_ULTIMATE.start_main_~y~0.base .cse8) (select (store (select (let ((.cse9 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset c_ULTIMATE.start_main_~list~0.base)))) (store .cse9 c_ULTIMATE.start_main_~list~0.base (store (select .cse9 c_ULTIMATE.start_main_~list~0.base) .cse10 c_ULTIMATE.start_main_~y~0.base))) c_ULTIMATE.start_main_~y~0.base) .cse11 c_ULTIMATE.start_main_~y~0.base) ULTIMATE.start_main_~y~0.offset)) (bvadd (_ bv8 32) .cse12)) (bvadd .cse12 (_ bv12 32))))))))) is different from false [2021-10-13 07:50:45,630 WARN L207 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 134 DAG size of output: 42 [2021-10-13 07:50:45,631 INFO L354 Elim1Store]: treesize reduction 2375, result has 2.8 percent of original size [2021-10-13 07:50:45,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 14361 treesize of output 7083 [2021-10-13 07:50:47,012 INFO L354 Elim1Store]: treesize reduction 700, result has 14.9 percent of original size [2021-10-13 07:50:47,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 10249 treesize of output 3560 [2021-10-13 07:50:47,162 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:50:47,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3438 treesize of output 3368 [2021-10-13 07:50:47,231 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:50:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3368 treesize of output 3190 [2021-10-13 07:50:47,353 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 07:50:47,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3190 treesize of output 3080 [2021-10-13 07:50:47,476 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-13 07:50:47,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3080 treesize of output 2992 [2021-10-13 07:50:47,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:50:47,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332106624] [2021-10-13 07:50:47,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-10-13 07:50:47,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1024523510] [2021-10-13 07:50:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:47,515 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:50:47,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:50:47,524 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:50:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-13 07:50:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 07:50:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:48,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5dcb8305 [2021-10-13 07:50:48,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249977356] [2021-10-13 07:50:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:50:48,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:50:48,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:50:48,922 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:50:48,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-13 07:50:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:50:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 07:50:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:50:50,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5dcb8305 [2021-10-13 07:50:50,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:50:50,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:50:50,020 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:50:50,020 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:50:50,027 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:50:50,029 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:50:50,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:50:50,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:50:50,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:50:50,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:50:50,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:50:50,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:50:50,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:50,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:50,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:50,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:50,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:50:50,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:50:50,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:50,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:50,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-13 07:50:50,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:50:50,640 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:50:50,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:50:50 BoogieIcfgContainer [2021-10-13 07:50:50,656 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:50:50,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:50:50,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:50:50,657 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:50:50,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:40:42" (3/4) ... [2021-10-13 07:50:50,662 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:50:50,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:50:50,663 INFO L168 Benchmark]: Toolchain (without parser) took 609484.64 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 50.7 MB in the beginning and 39.9 MB in the end (delta: 10.8 MB). Peak memory consumption was 40.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:50,664 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.3 MB in the end (delta: 71.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:50,664 INFO L168 Benchmark]: CACSL2BoogieTranslator took 522.75 ms. Allocated memory is still 88.1 MB. Free memory was 50.5 MB in the beginning and 65.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:50,665 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.21 ms. Allocated memory is still 88.1 MB. Free memory was 65.1 MB in the beginning and 63.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:50,665 INFO L168 Benchmark]: Boogie Preprocessor took 32.39 ms. Allocated memory is still 88.1 MB. Free memory was 63.0 MB in the beginning and 61.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:50,665 INFO L168 Benchmark]: RCFGBuilder took 714.11 ms. Allocated memory is still 88.1 MB. Free memory was 61.4 MB in the beginning and 46.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:50,666 INFO L168 Benchmark]: TraceAbstraction took 608153.75 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 45.9 MB in the beginning and 39.9 MB in the end (delta: 6.0 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:50:50,666 INFO L168 Benchmark]: Witness Printer took 5.44 ms. Allocated memory is still 115.3 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:50:50,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.3 MB in the end (delta: 71.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 522.75 ms. Allocated memory is still 88.1 MB. Free memory was 50.5 MB in the beginning and 65.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.21 ms. Allocated memory is still 88.1 MB. Free memory was 65.1 MB in the beginning and 63.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.39 ms. Allocated memory is still 88.1 MB. Free memory was 63.0 MB in the beginning and 61.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 714.11 ms. Allocated memory is still 88.1 MB. Free memory was 61.4 MB in the beginning and 46.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 608153.75 ms. Allocated memory was 88.1 MB in the beginning and 115.3 MB in the end (delta: 27.3 MB). Free memory was 45.9 MB in the beginning and 39.9 MB in the end (delta: 6.0 MB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.44 ms. Allocated memory is still 115.3 MB. Free memory is still 39.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 565]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L537] Node* list = ((void *)0); [L538] Node* y = ((void *)0); [L539] y = malloc(sizeof(*y)) [L540] y->next = ((void *)0) [L541] y->prev = ((void *)0) [L542] y->pData = &y->data [L543] list = y [L544] COND TRUE __VERIFIER_nondet_int() [L546] y = malloc(sizeof(*y)) [L547] y->next = list [L548] list->prev = y [L549] COND FALSE !(__VERIFIER_nondet_int()) [L555] y->pData = &y->data [L557] list = y [L544] COND FALSE !(__VERIFIER_nondet_int()) [L559] COND TRUE ((void *)0) != list [L561] y = list [L562] EXPR list->next [L562] list = list->next [L563] EXPR y->pData [L563] COND FALSE !(&y->data != y->pData) [L567] free(y) [L567] free(y) [L567] free(y) [L559] COND TRUE ((void *)0) != list [L561] y = list [L562] EXPR list->next [L562] list = list->next [L563] EXPR y->pData [L563] COND TRUE &y->data != y->pData [L565] EXPR y->pData [L565] free(y->pData) - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 551]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 57 locations, 27 error locations. Started 1 CEGAR loops. OverallTime: 608080.3ms, OverallIterations: 21, TraceHistogramMax: 2, EmptinessCheckTime: 37.0ms, AutomataDifference: 406118.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 464 SDtfs, 1729 SDslu, 1630 SDs, 0 SdLazy, 4419 SolverSat, 756 SolverUnsat, 61 SolverUnknown, 0 SolverNotchecked, 145412.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1418 GetRequests, 966 SyntacticMatches, 70 SemanticMatches, 382 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 4042 ImplicationChecksByTransitivity, 336272.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=20, InterpolantAutomatonStates: 263, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 100.3ms AutomataMinimizationTime, 20 MinimizatonAttempts, 282 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 288.7ms SsaConstructionTime, 2141.5ms SatisfiabilityAnalysisTime, 104676.4ms InterpolantComputationTime, 655 NumberOfCodeBlocks, 655 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 1242 ConstructedInterpolants, 224 QuantifiedInterpolants, 19304 SizeOfPredicates, 285 NumberOfNonLiveVariables, 3186 ConjunctsInSsa, 405 ConjunctsInUnsatCore, 68 InterpolantComputations, 26 PerfectInterpolantSequences, 16/154 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:50:50,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcac74c4-2147-403e-9b35-bad93d3e6312/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...