./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-sorted-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-sorted-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97c87a4be2f33468a224d89594f96c367f5837bb79771cd5155d22e1299d7831 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-sorted-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97c87a4be2f33468a224d89594f96c367f5837bb79771cd5155d22e1299d7831 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:11:58,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:11:58,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:11:58,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:11:58,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:11:58,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:11:58,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:11:58,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:11:58,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:11:58,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:11:58,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:11:58,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:11:58,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:11:58,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:11:58,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:11:58,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:11:58,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:11:58,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:11:58,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:11:58,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:11:58,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:11:58,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:11:58,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:11:58,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:11:58,992 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:11:58,993 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:11:58,993 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:11:58,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:11:58,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:11:58,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:11:58,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:11:58,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:11:58,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:11:59,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:11:59,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:11:59,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:11:59,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:11:59,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:11:59,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:11:59,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:11:59,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:11:59,019 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:11:59,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:11:59,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:11:59,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:11:59,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:11:59,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:11:59,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:11:59,058 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:11:59,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:11:59,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:11:59,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:11:59,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:11:59,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:11:59,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:11:59,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:11:59,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:11:59,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:11:59,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:11:59,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:11:59,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:11:59,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:11:59,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:11:59,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:11:59,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:11:59,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:11:59,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:11:59,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:11:59,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:11:59,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:11:59,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:11:59,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:11:59,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:11:59,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:11:59,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97c87a4be2f33468a224d89594f96c367f5837bb79771cd5155d22e1299d7831 [2021-10-21 19:11:59,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:11:59,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:11:59,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:11:59,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:11:59,333 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:11:59,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/forester-heap/dll-sorted-2.i [2021-10-21 19:11:59,419 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/faaaa5fcd/dd68eec98aeb4022bcce06b90acec1da/FLAG7cd4b1099 [2021-10-21 19:11:59,964 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:11:59,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i [2021-10-21 19:11:59,983 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/faaaa5fcd/dd68eec98aeb4022bcce06b90acec1da/FLAG7cd4b1099 [2021-10-21 19:12:00,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/faaaa5fcd/dd68eec98aeb4022bcce06b90acec1da [2021-10-21 19:12:00,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:12:00,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:12:00,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:12:00,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:12:00,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:12:00,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd8a7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00, skipping insertion in model container [2021-10-21 19:12:00,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:12:00,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:12:00,684 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22384,22397] [2021-10-21 19:12:00,689 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22614,22627] [2021-10-21 19:12:00,693 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22989,23002] [2021-10-21 19:12:00,694 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23053,23066] [2021-10-21 19:12:00,696 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23184,23197] [2021-10-21 19:12:00,697 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23248,23261] [2021-10-21 19:12:00,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:12:00,710 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:12:00,745 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22384,22397] [2021-10-21 19:12:00,748 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22614,22627] [2021-10-21 19:12:00,752 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22989,23002] [2021-10-21 19:12:00,753 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23053,23066] [2021-10-21 19:12:00,754 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23184,23197] [2021-10-21 19:12:00,755 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23248,23261] [2021-10-21 19:12:00,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:12:00,790 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:12:00,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00 WrapperNode [2021-10-21 19:12:00,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:12:00,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:12:00,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:12:00,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:12:00,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:12:00,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:12:00,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:12:00,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:12:00,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:12:00,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:12:00,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:12:00,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:12:00,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (1/1) ... [2021-10-21 19:12:00,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:12:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:00,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:12:00,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:12:01,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:12:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:12:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:12:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:12:01,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:12:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:12:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:12:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:12:01,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:12:01,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:12:01,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:12:01,491 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-21 19:12:01,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:12:01 BoogieIcfgContainer [2021-10-21 19:12:01,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:12:01,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:12:01,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:12:01,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:12:01,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:12:00" (1/3) ... [2021-10-21 19:12:01,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368663b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:12:01, skipping insertion in model container [2021-10-21 19:12:01,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:12:00" (2/3) ... [2021-10-21 19:12:01,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368663b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:12:01, skipping insertion in model container [2021-10-21 19:12:01,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:12:01" (3/3) ... [2021-10-21 19:12:01,503 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-2.i [2021-10-21 19:12:01,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:12:01,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-21 19:12:01,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:12:01,563 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:12:01,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-21 19:12:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:12:01,600 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:01,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:12:01,602 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash 890153286, now seen corresponding path program 1 times [2021-10-21 19:12:01,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:01,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333871001] [2021-10-21 19:12:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:01,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:01,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:01,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333871001] [2021-10-21 19:12:01,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333871001] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:01,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:01,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:12:01,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451760356] [2021-10-21 19:12:01,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:12:01,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:12:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:12:01,820 INFO L87 Difference]: Start difference. First operand has 56 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:01,841 INFO L93 Difference]: Finished difference Result 106 states and 172 transitions. [2021-10-21 19:12:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:12:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:12:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:01,851 INFO L225 Difference]: With dead ends: 106 [2021-10-21 19:12:01,851 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:12:01,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:12:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:12:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-21 19:12:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-10-21 19:12:01,893 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 6 [2021-10-21 19:12:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:01,893 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-10-21 19:12:01,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-10-21 19:12:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:12:01,894 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:01,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:01,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:12:01,895 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:01,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1806859191, now seen corresponding path program 1 times [2021-10-21 19:12:01,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:01,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584605489] [2021-10-21 19:12:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:01,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:02,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:02,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584605489] [2021-10-21 19:12:02,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584605489] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:02,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:02,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:12:02,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555226553] [2021-10-21 19:12:02,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:12:02,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:12:02,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:02,004 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:02,047 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2021-10-21 19:12:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:12:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-21 19:12:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:02,049 INFO L225 Difference]: With dead ends: 103 [2021-10-21 19:12:02,049 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:12:02,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:12:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:12:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-10-21 19:12:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-10-21 19:12:02,058 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 7 [2021-10-21 19:12:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:02,059 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-10-21 19:12:02,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-10-21 19:12:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:12:02,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:02,073 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:02,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:12:02,073 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 443319948, now seen corresponding path program 1 times [2021-10-21 19:12:02,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:02,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015642539] [2021-10-21 19:12:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:02,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:12:02,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:02,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015642539] [2021-10-21 19:12:02,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015642539] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:02,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:02,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:12:02,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185162819] [2021-10-21 19:12:02,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:12:02,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:02,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:12:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:12:02,231 INFO L87 Difference]: Start difference. First operand 54 states and 65 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) [2021-10-21 19:12:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:02,399 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2021-10-21 19:12:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:12:02,403 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 11 [2021-10-21 19:12:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:02,404 INFO L225 Difference]: With dead ends: 87 [2021-10-21 19:12:02,404 INFO L226 Difference]: Without dead ends: 85 [2021-10-21 19:12:02,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:12:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-21 19:12:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-10-21 19:12:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-10-21 19:12:02,414 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 11 [2021-10-21 19:12:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:02,414 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-10-21 19:12:02,414 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) [2021-10-21 19:12:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-10-21 19:12:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:12:02,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:02,420 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] [2021-10-21 19:12:02,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:12:02,420 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1236050174, now seen corresponding path program 1 times [2021-10-21 19:12:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:02,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320449192] [2021-10-21 19:12:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:02,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:03,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:03,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320449192] [2021-10-21 19:12:03,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320449192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:03,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065235472] [2021-10-21 19:12:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:03,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:03,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:03,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:12:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:12:03,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:03,246 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 [2021-10-21 19:12:03,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,390 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:03,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-10-21 19:12:03,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,428 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:03,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 59 [2021-10-21 19:12:03,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:12:03,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2021-10-21 19:12:03,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:03,664 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:03,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 93 [2021-10-21 19:12:03,673 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 106 treesize of output 98 [2021-10-21 19:12:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:03,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:03,692 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:12:03,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 80 [2021-10-21 19:12:04,328 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:12:04,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 58 [2021-10-21 19:12:04,338 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:12:04,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 30 [2021-10-21 19:12:04,364 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 [2021-10-21 19:12:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:04,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065235472] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:04,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:04,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-21 19:12:04,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071291741] [2021-10-21 19:12:04,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:12:04,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:12:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:12:04,374 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:05,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:05,464 INFO L93 Difference]: Finished difference Result 109 states and 142 transitions. [2021-10-21 19:12:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:12:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-21 19:12:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:05,468 INFO L225 Difference]: With dead ends: 109 [2021-10-21 19:12:05,468 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:12:05,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 543.6ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:12:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:12:05,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-10-21 19:12:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.353846153846154) internal successors, (88), 69 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) [2021-10-21 19:12:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2021-10-21 19:12:05,485 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 21 [2021-10-21 19:12:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:05,486 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2021-10-21 19:12:05,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2021-10-21 19:12:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:12:05,487 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:05,487 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] [2021-10-21 19:12:05,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:05,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:05,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:05,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1635781222, now seen corresponding path program 1 times [2021-10-21 19:12:05,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:05,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458210928] [2021-10-21 19:12:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:05,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:05,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:05,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458210928] [2021-10-21 19:12:05,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458210928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:05,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264375849] [2021-10-21 19:12:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:05,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:05,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:05,890 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:05,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:12:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:12:06,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:06,065 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 [2021-10-21 19:12:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:06,170 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-10-21 19:12:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:06,206 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:12:06,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 68 [2021-10-21 19:12:06,215 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:12:06,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2021-10-21 19:12:06,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:06,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 82 [2021-10-21 19:12:06,350 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:12:06,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2021-10-21 19:12:06,807 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-21 19:12:06,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 82 [2021-10-21 19:12:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:06,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264375849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:06,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:06,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-21 19:12:06,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396231311] [2021-10-21 19:12:06,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:12:06,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:12:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:12:06,890 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:11,887 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2021-10-21 19:12:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:12:11,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-21 19:12:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:11,889 INFO L225 Difference]: With dead ends: 144 [2021-10-21 19:12:11,889 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 19:12:11,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 615.7ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:12:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 19:12:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2021-10-21 19:12:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2021-10-21 19:12:11,901 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 24 [2021-10-21 19:12:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:11,901 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2021-10-21 19:12:11,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2021-10-21 19:12:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:12:11,903 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:11,903 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:11,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:12,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:12,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 826434596, now seen corresponding path program 1 times [2021-10-21 19:12:12,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:12,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223952216] [2021-10-21 19:12:12,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:12,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:12:12,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:12,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223952216] [2021-10-21 19:12:12,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223952216] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:12,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:12,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:12:12,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101439289] [2021-10-21 19:12:12,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:12:12,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:12,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:12:12,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:12:12,188 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:12,272 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2021-10-21 19:12:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:12:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2021-10-21 19:12:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:12,273 INFO L225 Difference]: With dead ends: 121 [2021-10-21 19:12:12,274 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 19:12:12,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:12:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 19:12:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2021-10-21 19:12:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.323943661971831) internal successors, (94), 75 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-10-21 19:12:12,284 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 24 [2021-10-21 19:12:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:12,284 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-10-21 19:12:12,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-10-21 19:12:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:12:12,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:12,286 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:12,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:12:12,286 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:12,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:12,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1438181591, now seen corresponding path program 1 times [2021-10-21 19:12:12,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:12,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406705362] [2021-10-21 19:12:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:12,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:12,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406705362] [2021-10-21 19:12:12,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406705362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:12,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859996956] [2021-10-21 19:12:12,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:12,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:12,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:12,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:12,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:12:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 19:12:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:12,855 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 [2021-10-21 19:12:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:12,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:12,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:12,933 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:12,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:12:12,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:12,954 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:12:12,976 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:12:12,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:12:13,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:13,158 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:13,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 96 [2021-10-21 19:12:13,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:13,174 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:13,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 64 [2021-10-21 19:12:13,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:12:13,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:13,508 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-10-21 19:12:13,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 340 treesize of output 203 [2021-10-21 19:12:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:13,603 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-10-21 19:12:13,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 332 treesize of output 240 [2021-10-21 19:12:13,612 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 231 treesize of output 207 [2021-10-21 19:12:13,633 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 204 treesize of output 168 [2021-10-21 19:12:13,671 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-21 19:12:13,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 175 [2021-10-21 19:12:13,690 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-21 19:12:13,690 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 166 treesize of output 154 [2021-10-21 19:12:13,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:13,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:14,019 INFO L354 Elim1Store]: treesize reduction 208, result has 16.8 percent of original size [2021-10-21 19:12:14,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 158 [2021-10-21 19:12:14,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:14,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:14,091 INFO L354 Elim1Store]: treesize reduction 384, result has 14.7 percent of original size [2021-10-21 19:12:14,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 229 treesize of output 207 [2021-10-21 19:12:14,112 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-10-21 19:12:14,112 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 192 treesize of output 183 [2021-10-21 19:12:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:15,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:15,468 INFO L354 Elim1Store]: treesize reduction 48, result has 21.3 percent of original size [2021-10-21 19:12:15,468 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 210 treesize of output 128 [2021-10-21 19:12:15,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:15,488 INFO L354 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2021-10-21 19:12:15,488 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 116 treesize of output 89 [2021-10-21 19:12:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:15,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859996956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:15,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:15,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-10-21 19:12:15,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438455581] [2021-10-21 19:12:15,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:12:15,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:12:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:12:15,875 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:17,297 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2021-10-21 19:12:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:12:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-21 19:12:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:17,299 INFO L225 Difference]: With dead ends: 197 [2021-10-21 19:12:17,299 INFO L226 Difference]: Without dead ends: 161 [2021-10-21 19:12:17,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1022.4ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:12:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-10-21 19:12:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 90. [2021-10-21 19:12:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 89 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-10-21 19:12:17,312 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 25 [2021-10-21 19:12:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:17,313 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-10-21 19:12:17,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-10-21 19:12:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:12:17,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:17,314 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:17,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:17,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:17,540 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash 244780313, now seen corresponding path program 1 times [2021-10-21 19:12:17,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:17,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602805177] [2021-10-21 19:12:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:17,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:17,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:17,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602805177] [2021-10-21 19:12:17,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602805177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:17,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167667983] [2021-10-21 19:12:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:17,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:17,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:17,952 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:17,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:12:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:12:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:18,247 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 [2021-10-21 19:12:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,337 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:18,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:12:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,361 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:18,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:12:18,380 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:12:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:12:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:18,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 96 [2021-10-21 19:12:18,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:18,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:18,583 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 64 [2021-10-21 19:12:18,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:12:18,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:18,910 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-10-21 19:12:18,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 340 treesize of output 203 [2021-10-21 19:12:18,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:18,969 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-10-21 19:12:18,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 332 treesize of output 240 [2021-10-21 19:12:18,984 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 231 treesize of output 207 [2021-10-21 19:12:18,990 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 204 treesize of output 168 [2021-10-21 19:12:19,006 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-10-21 19:12:19,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 175 [2021-10-21 19:12:19,019 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-21 19:12:19,019 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 166 treesize of output 154 [2021-10-21 19:12:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:19,283 INFO L354 Elim1Store]: treesize reduction 208, result has 16.8 percent of original size [2021-10-21 19:12:19,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 263 treesize of output 158 [2021-10-21 19:12:19,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:19,343 INFO L354 Elim1Store]: treesize reduction 384, result has 14.7 percent of original size [2021-10-21 19:12:19,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 229 treesize of output 207 [2021-10-21 19:12:19,355 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-10-21 19:12:19,356 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 192 treesize of output 183 [2021-10-21 19:12:21,169 INFO L354 Elim1Store]: treesize reduction 76, result has 14.6 percent of original size [2021-10-21 19:12:21,170 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 196 treesize of output 118 [2021-10-21 19:12:21,187 INFO L354 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2021-10-21 19:12:21,187 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 112 treesize of output 79 [2021-10-21 19:12:21,290 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-21 19:12:21,290 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 28 treesize of output 14 [2021-10-21 19:12:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:21,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167667983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:21,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:21,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-10-21 19:12:21,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404481522] [2021-10-21 19:12:21,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:12:21,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:12:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:12:21,301 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:23,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:23,287 INFO L93 Difference]: Finished difference Result 214 states and 267 transitions. [2021-10-21 19:12:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:12:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-10-21 19:12:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:23,289 INFO L225 Difference]: With dead ends: 214 [2021-10-21 19:12:23,289 INFO L226 Difference]: Without dead ends: 212 [2021-10-21 19:12:23,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1150.3ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:12:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-21 19:12:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 101. [2021-10-21 19:12:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3333333333333333) internal successors, (128), 100 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2021-10-21 19:12:23,303 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 25 [2021-10-21 19:12:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:23,303 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2021-10-21 19:12:23,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2021-10-21 19:12:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:12:23,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:23,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:23,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-21 19:12:23,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:23,521 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash -750062803, now seen corresponding path program 1 times [2021-10-21 19:12:23,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:23,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878390713] [2021-10-21 19:12:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:23,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:23,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:23,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878390713] [2021-10-21 19:12:23,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878390713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:23,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143916011] [2021-10-21 19:12:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:23,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:23,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:23,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:23,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:12:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:24,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:12:24,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:24,055 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 [2021-10-21 19:12:24,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:24,124 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:24,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 125 [2021-10-21 19:12:24,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:24,143 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:24,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 59 [2021-10-21 19:12:24,151 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:12:24,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 68 [2021-10-21 19:12:24,236 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:12:24,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 82 [2021-10-21 19:12:24,244 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:12:24,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2021-10-21 19:12:24,741 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-21 19:12:24,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 75 [2021-10-21 19:12:24,754 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-21 19:12:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 33 [2021-10-21 19:12:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:24,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143916011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:24,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:24,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-10-21 19:12:24,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145843084] [2021-10-21 19:12:24,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:12:24,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:24,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:12:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:12:24,790 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2021-10-21 19:12:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:27,466 INFO L93 Difference]: Finished difference Result 171 states and 213 transitions. [2021-10-21 19:12:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:12:27,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:12:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:27,469 INFO L225 Difference]: With dead ends: 171 [2021-10-21 19:12:27,469 INFO L226 Difference]: Without dead ends: 135 [2021-10-21 19:12:27,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:12:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-21 19:12:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 107. [2021-10-21 19:12:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 106 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2021-10-21 19:12:27,483 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 27 [2021-10-21 19:12:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:27,484 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2021-10-21 19:12:27,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 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) [2021-10-21 19:12:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2021-10-21 19:12:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:12:27,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:27,486 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, 1, 1, 1, 1] [2021-10-21 19:12:27,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:27,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:27,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1821911330, now seen corresponding path program 1 times [2021-10-21 19:12:27,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:27,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818096677] [2021-10-21 19:12:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:27,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:27,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:27,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818096677] [2021-10-21 19:12:27,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818096677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:27,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388314356] [2021-10-21 19:12:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:27,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:27,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:12:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:28,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:12:28,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:28,338 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 [2021-10-21 19:12:28,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:28,430 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-21 19:12:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 49 [2021-10-21 19:12:28,449 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:12:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:12:28,606 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-10-21 19:12:28,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 69 [2021-10-21 19:12:29,410 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-21 19:12:29,410 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 241 treesize of output 220 [2021-10-21 19:12:29,430 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:12:29,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 216 [2021-10-21 19:12:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:29,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388314356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:29,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:29,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-10-21 19:12:29,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261524048] [2021-10-21 19:12:29,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:12:29,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:29,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:12:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:12:29,527 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:30,974 INFO L93 Difference]: Finished difference Result 326 states and 395 transitions. [2021-10-21 19:12:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:12:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:12:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:30,975 INFO L225 Difference]: With dead ends: 326 [2021-10-21 19:12:30,975 INFO L226 Difference]: Without dead ends: 259 [2021-10-21 19:12:30,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 934.9ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:12:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-21 19:12:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 119. [2021-10-21 19:12:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.3245614035087718) internal successors, (151), 118 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 151 transitions. [2021-10-21 19:12:30,995 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 151 transitions. Word has length 27 [2021-10-21 19:12:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 151 transitions. [2021-10-21 19:12:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 151 transitions. [2021-10-21 19:12:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:12:31,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:31,001 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, 1, 1, 1, 1] [2021-10-21 19:12:31,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 19:12:31,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:31,202 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:31,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:31,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1012564704, now seen corresponding path program 1 times [2021-10-21 19:12:31,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:31,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998155266] [2021-10-21 19:12:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:31,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:31,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:31,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998155266] [2021-10-21 19:12:31,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998155266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:31,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915341765] [2021-10-21 19:12:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:31,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:31,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:12:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:32,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 19:12:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:32,181 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 [2021-10-21 19:12:32,187 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 [2021-10-21 19:12:32,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:32,292 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-21 19:12:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 133 treesize of output 99 [2021-10-21 19:12:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:32,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 76 [2021-10-21 19:12:32,324 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:12:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 70 [2021-10-21 19:12:32,339 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-21 19:12:32,340 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 64 treesize of output 52 [2021-10-21 19:12:32,528 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-10-21 19:12:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 87 [2021-10-21 19:12:32,541 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-10-21 19:12:32,542 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 83 treesize of output 78 [2021-10-21 19:12:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:33,612 INFO L354 Elim1Store]: treesize reduction 122, result has 15.3 percent of original size [2021-10-21 19:12:33,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 132 [2021-10-21 19:12:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:33,709 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-10-21 19:12:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 136 treesize of output 132 [2021-10-21 19:12:33,793 INFO L354 Elim1Store]: treesize reduction 226, result has 12.4 percent of original size [2021-10-21 19:12:33,793 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 4 case distinctions, treesize of input 136 treesize of output 131 [2021-10-21 19:12:33,835 INFO L354 Elim1Store]: treesize reduction 180, result has 15.1 percent of original size [2021-10-21 19:12:33,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 115 [2021-10-21 19:12:33,852 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-21 19:12:33,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 108 [2021-10-21 19:12:34,014 INFO L354 Elim1Store]: treesize reduction 101, result has 7.3 percent of original size [2021-10-21 19:12:34,015 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 168 treesize of output 129 [2021-10-21 19:12:34,033 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 117 treesize of output 109 [2021-10-21 19:12:34,100 INFO L354 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2021-10-21 19:12:34,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 110 treesize of output 99 [2021-10-21 19:12:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:34,123 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-10-21 19:12:34,128 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 5 case distinctions, treesize of input 81 treesize of output 75 [2021-10-21 19:12:34,312 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-21 19:12:34,312 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 28 treesize of output 14 [2021-10-21 19:12:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:34,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915341765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:34,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:34,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-10-21 19:12:34,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922280255] [2021-10-21 19:12:34,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:12:34,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:12:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:12:34,321 INFO L87 Difference]: Start difference. First operand 119 states and 151 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:36,279 INFO L93 Difference]: Finished difference Result 323 states and 382 transitions. [2021-10-21 19:12:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:12:36,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-21 19:12:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:36,282 INFO L225 Difference]: With dead ends: 323 [2021-10-21 19:12:36,282 INFO L226 Difference]: Without dead ends: 308 [2021-10-21 19:12:36,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1219.4ms TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:12:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-10-21 19:12:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 153. [2021-10-21 19:12:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.3175675675675675) internal successors, (195), 152 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 195 transitions. [2021-10-21 19:12:36,303 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 195 transitions. Word has length 27 [2021-10-21 19:12:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:36,305 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 195 transitions. [2021-10-21 19:12:36,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 195 transitions. [2021-10-21 19:12:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:12:36,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:36,309 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:36,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:36,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:12:36,524 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1969048463, now seen corresponding path program 1 times [2021-10-21 19:12:36,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:36,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139382244] [2021-10-21 19:12:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:36,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:36,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:36,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139382244] [2021-10-21 19:12:36,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139382244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:36,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729897678] [2021-10-21 19:12:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:36,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:36,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:36,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:36,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:12:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:12:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:37,384 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 [2021-10-21 19:12:37,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:37,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,445 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:37,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:12:37,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,465 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:37,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:12:37,478 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:12:37,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:12:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:12:37,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:37,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:12:37,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:37,787 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:12:37,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 323 treesize of output 178 [2021-10-21 19:12:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:37,839 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:12:37,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 146 treesize of output 123 [2021-10-21 19:12:37,851 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-21 19:12:37,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 108 [2021-10-21 19:12:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:38,034 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:12:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 116 [2021-10-21 19:12:38,039 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 183 treesize of output 171 [2021-10-21 19:12:38,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:38,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:38,055 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-10-21 19:12:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 171 treesize of output 147 [2021-10-21 19:12:39,188 INFO L354 Elim1Store]: treesize reduction 125, result has 8.8 percent of original size [2021-10-21 19:12:39,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 168 treesize of output 93 [2021-10-21 19:12:39,211 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-10-21 19:12:39,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 50 [2021-10-21 19:12:39,232 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 [2021-10-21 19:12:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:39,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729897678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:39,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:12:39,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-10-21 19:12:39,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594198927] [2021-10-21 19:12:39,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:12:39,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:39,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:12:39,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:12:39,244 INFO L87 Difference]: Start difference. First operand 153 states and 195 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:55,210 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2021-10-21 19:12:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:12:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 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 [2021-10-21 19:12:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:55,212 INFO L225 Difference]: With dead ends: 242 [2021-10-21 19:12:55,212 INFO L226 Difference]: Without dead ends: 240 [2021-10-21 19:12:55,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 937.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:12:55,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-21 19:12:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 162. [2021-10-21 19:12:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.3248407643312101) internal successors, (208), 161 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 208 transitions. [2021-10-21 19:12:55,231 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 208 transitions. Word has length 28 [2021-10-21 19:12:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:55,231 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 208 transitions. [2021-10-21 19:12:55,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 208 transitions. [2021-10-21 19:12:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:12:55,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:55,235 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, 1, 1, 1, 1, 1] [2021-10-21 19:12:55,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:12:55,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:55,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:55,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1324243399, now seen corresponding path program 1 times [2021-10-21 19:12:55,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:55,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300060548] [2021-10-21 19:12:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:55,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:12:55,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:55,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300060548] [2021-10-21 19:12:55,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300060548] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:55,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:55,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:12:55,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134673037] [2021-10-21 19:12:55,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:12:55,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:12:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:12:55,521 INFO L87 Difference]: Start difference. First operand 162 states and 208 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:55,649 INFO L93 Difference]: Finished difference Result 180 states and 229 transitions. [2021-10-21 19:12:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:12:55,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 19:12:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:55,651 INFO L225 Difference]: With dead ends: 180 [2021-10-21 19:12:55,651 INFO L226 Difference]: Without dead ends: 178 [2021-10-21 19:12:55,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:12:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-21 19:12:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 170. [2021-10-21 19:12:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.3212121212121213) internal successors, (218), 169 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2021-10-21 19:12:55,670 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 28 [2021-10-21 19:12:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:55,670 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2021-10-21 19:12:55,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2021-10-21 19:12:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:12:55,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:55,671 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, 1, 1, 1, 1, 1] [2021-10-21 19:12:55,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:12:55,672 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1381501701, now seen corresponding path program 1 times [2021-10-21 19:12:55,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:55,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759837266] [2021-10-21 19:12:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:55,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:12:55,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:55,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759837266] [2021-10-21 19:12:55,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759837266] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:12:55,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:12:55,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:12:55,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799458184] [2021-10-21 19:12:55,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:12:55,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:12:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:12:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:12:55,722 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:12:55,839 INFO L93 Difference]: Finished difference Result 227 states and 280 transitions. [2021-10-21 19:12:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:12:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 19:12:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:12:55,841 INFO L225 Difference]: With dead ends: 227 [2021-10-21 19:12:55,841 INFO L226 Difference]: Without dead ends: 189 [2021-10-21 19:12:55,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:12:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-21 19:12:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 168. [2021-10-21 19:12:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.3067484662576687) internal successors, (213), 167 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 213 transitions. [2021-10-21 19:12:55,874 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 213 transitions. Word has length 28 [2021-10-21 19:12:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:12:55,876 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 213 transitions. [2021-10-21 19:12:55,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:12:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 213 transitions. [2021-10-21 19:12:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:12:55,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:12:55,877 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:12:55,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:12:55,877 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:12:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:12:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1357611052, now seen corresponding path program 2 times [2021-10-21 19:12:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:12:55,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140218522] [2021-10-21 19:12:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:12:55,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:12:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:12:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:12:56,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:12:56,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140218522] [2021-10-21 19:12:56,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140218522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:12:56,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380244777] [2021-10-21 19:12:56,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:12:56,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:12:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:12:56,351 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:12:56,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:12:56,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:12:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:12:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-21 19:12:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:12:56,947 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 [2021-10-21 19:12:56,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:56,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,008 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:12:57,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,026 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:12:57,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:12:57,039 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:12:57,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:12:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:12:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:12:57,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:12:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:57,415 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-10-21 19:12:57,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 346 treesize of output 209 [2021-10-21 19:12:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:57,469 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:12:57,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 221 treesize of output 198 [2021-10-21 19:12:57,526 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-10-21 19:12:57,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 189 treesize of output 204 [2021-10-21 19:12:57,538 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 183 treesize of output 159 [2021-10-21 19:12:57,563 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-10-21 19:12:57,564 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 2 case distinctions, treesize of input 156 treesize of output 152 [2021-10-21 19:12:57,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:57,881 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-10-21 19:12:57,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 167 treesize of output 144 [2021-10-21 19:12:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:57,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:57,937 INFO L354 Elim1Store]: treesize reduction 202, result has 17.6 percent of original size [2021-10-21 19:12:57,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 157 treesize of output 159 [2021-10-21 19:12:57,954 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-21 19:12:57,954 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 1 case distinctions, treesize of input 144 treesize of output 143 [2021-10-21 19:12:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:58,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:58,575 INFO L354 Elim1Store]: treesize reduction 380, result has 13.4 percent of original size [2021-10-21 19:12:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 587 treesize of output 303 [2021-10-21 19:12:58,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:12:58,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:12:58,763 INFO L354 Elim1Store]: treesize reduction 832, result has 9.1 percent of original size [2021-10-21 19:12:58,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 618 treesize of output 492 [2021-10-21 19:12:58,827 INFO L354 Elim1Store]: treesize reduction 318, result has 12.2 percent of original size [2021-10-21 19:12:58,827 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 4 case distinctions, treesize of input 486 treesize of output 408 [2021-10-21 19:12:58,862 INFO L354 Elim1Store]: treesize reduction 124, result has 19.0 percent of original size [2021-10-21 19:12:58,863 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 387 treesize of output 378 [2021-10-21 19:12:58,894 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-10-21 19:12:58,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 372 treesize of output 400 [2021-10-21 19:13:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:00,768 INFO L354 Elim1Store]: treesize reduction 372, result has 13.1 percent of original size [2021-10-21 19:13:00,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 460 treesize of output 232 [2021-10-21 19:13:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:00,894 INFO L354 Elim1Store]: treesize reduction 860, result has 10.8 percent of original size [2021-10-21 19:13:00,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 414 treesize of output 386 [2021-10-21 19:13:00,918 INFO L354 Elim1Store]: treesize reduction 172, result has 14.4 percent of original size [2021-10-21 19:13:00,919 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 368 treesize of output 358 [2021-10-21 19:13:11,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:12,001 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-21 19:13:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 249 [2021-10-21 19:13:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:12,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380244777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:13:12,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:13:12,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-10-21 19:13:12,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732131918] [2021-10-21 19:13:12,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:13:12,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:12,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:13:12,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=474, Unknown=2, NotChecked=0, Total=552 [2021-10-21 19:13:12,708 INFO L87 Difference]: Start difference. First operand 168 states and 213 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:19,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:19,518 INFO L93 Difference]: Finished difference Result 460 states and 584 transitions. [2021-10-21 19:13:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-21 19:13:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-21 19:13:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:19,521 INFO L225 Difference]: With dead ends: 460 [2021-10-21 19:13:19,521 INFO L226 Difference]: Without dead ends: 357 [2021-10-21 19:13:19,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 5313.3ms TimeCoverageRelationStatistics Valid=386, Invalid=2474, Unknown=2, NotChecked=0, Total=2862 [2021-10-21 19:13:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-10-21 19:13:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 206. [2021-10-21 19:13:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.318407960199005) internal successors, (265), 205 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 265 transitions. [2021-10-21 19:13:19,545 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 265 transitions. Word has length 29 [2021-10-21 19:13:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:19,546 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 265 transitions. [2021-10-21 19:13:19,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 265 transitions. [2021-10-21 19:13:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:13:19,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:19,547 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:19,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:13:19,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:13:19,753 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:13:19,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:19,753 INFO L82 PathProgramCache]: Analyzing trace with hash 580376496, now seen corresponding path program 2 times [2021-10-21 19:13:19,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:19,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220930742] [2021-10-21 19:13:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:19,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:20,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:20,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220930742] [2021-10-21 19:13:20,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220930742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:13:20,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252169101] [2021-10-21 19:13:20,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:13:20,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:13:20,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:13:20,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:13:20,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:13:21,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:13:21,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:13:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-21 19:13:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:13:21,208 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 [2021-10-21 19:13:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,272 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:13:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:13:21,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,294 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:13:21,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:13:21,311 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:13:21,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:13:21,458 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 [2021-10-21 19:13:21,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:21,479 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:13:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 96 [2021-10-21 19:13:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:21,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:13:21,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 64 [2021-10-21 19:13:21,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:21,826 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-10-21 19:13:21,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 346 treesize of output 209 [2021-10-21 19:13:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:21,879 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:13:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 221 treesize of output 198 [2021-10-21 19:13:21,909 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-10-21 19:13:21,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 189 treesize of output 204 [2021-10-21 19:13:21,917 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 195 treesize of output 171 [2021-10-21 19:13:21,920 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 168 treesize of output 156 [2021-10-21 19:13:21,934 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-21 19:13:21,934 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 153 treesize of output 141 [2021-10-21 19:13:22,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:22,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:22,184 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-10-21 19:13:22,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 167 treesize of output 144 [2021-10-21 19:13:22,202 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-21 19:13:22,202 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 1 case distinctions, treesize of input 157 treesize of output 156 [2021-10-21 19:13:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:22,253 INFO L354 Elim1Store]: treesize reduction 202, result has 17.6 percent of original size [2021-10-21 19:13:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 153 treesize of output 155 [2021-10-21 19:13:22,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:22,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:22,955 INFO L354 Elim1Store]: treesize reduction 380, result has 13.4 percent of original size [2021-10-21 19:13:22,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 587 treesize of output 303 [2021-10-21 19:13:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:22,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:23,113 INFO L354 Elim1Store]: treesize reduction 832, result has 9.1 percent of original size [2021-10-21 19:13:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 618 treesize of output 492 [2021-10-21 19:13:23,165 INFO L354 Elim1Store]: treesize reduction 318, result has 12.2 percent of original size [2021-10-21 19:13:23,165 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 4 case distinctions, treesize of input 486 treesize of output 408 [2021-10-21 19:13:23,189 INFO L354 Elim1Store]: treesize reduction 124, result has 19.0 percent of original size [2021-10-21 19:13:23,189 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 387 treesize of output 378 [2021-10-21 19:13:23,231 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-10-21 19:13:23,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 372 treesize of output 400 [2021-10-21 19:13:24,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:24,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:24,410 INFO L354 Elim1Store]: treesize reduction 372, result has 13.1 percent of original size [2021-10-21 19:13:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 460 treesize of output 232 [2021-10-21 19:13:24,444 INFO L354 Elim1Store]: treesize reduction 172, result has 14.4 percent of original size [2021-10-21 19:13:24,444 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 414 treesize of output 404 [2021-10-21 19:13:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:13:24,546 INFO L354 Elim1Store]: treesize reduction 860, result has 10.8 percent of original size [2021-10-21 19:13:24,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 398 treesize of output 370 [2021-10-21 19:13:38,440 INFO L354 Elim1Store]: treesize reduction 176, result has 10.7 percent of original size [2021-10-21 19:13:38,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 364 treesize of output 185 [2021-10-21 19:13:38,481 INFO L354 Elim1Store]: treesize reduction 189, result has 4.1 percent of original size [2021-10-21 19:13:38,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 176 treesize of output 143 [2021-10-21 19:13:38,630 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-21 19:13:38,631 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 45 treesize of output 25 [2021-10-21 19:13:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:38,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252169101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:13:38,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:13:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-21 19:13:38,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516423427] [2021-10-21 19:13:38,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:13:38,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:13:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:13:38,638 INFO L87 Difference]: Start difference. First operand 206 states and 265 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2021-10-21 19:13:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:55,248 INFO L93 Difference]: Finished difference Result 378 states and 483 transitions. [2021-10-21 19:13:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:13:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-21 19:13:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:55,251 INFO L225 Difference]: With dead ends: 378 [2021-10-21 19:13:55,251 INFO L226 Difference]: Without dead ends: 376 [2021-10-21 19:13:55,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 8802.9ms TimeCoverageRelationStatistics Valid=304, Invalid=2045, Unknown=3, NotChecked=0, Total=2352 [2021-10-21 19:13:55,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-21 19:13:55,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 209. [2021-10-21 19:13:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.3186274509803921) internal successors, (269), 208 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 269 transitions. [2021-10-21 19:13:55,279 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 269 transitions. Word has length 29 [2021-10-21 19:13:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:55,280 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 269 transitions. [2021-10-21 19:13:55,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2021-10-21 19:13:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 269 transitions. [2021-10-21 19:13:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:13:55,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:55,281 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:55,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:13:55,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:13:55,496 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:13:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1287719083, now seen corresponding path program 1 times [2021-10-21 19:13:55,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:55,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083490372] [2021-10-21 19:13:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:55,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:13:55,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:55,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083490372] [2021-10-21 19:13:55,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083490372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:13:55,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:13:55,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:13:55,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682835257] [2021-10-21 19:13:55,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:13:55,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:55,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:13:55,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:13:55,551 INFO L87 Difference]: Start difference. First operand 209 states and 269 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:13:55,696 INFO L93 Difference]: Finished difference Result 347 states and 445 transitions. [2021-10-21 19:13:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:13:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 30 [2021-10-21 19:13:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:13:55,698 INFO L225 Difference]: With dead ends: 347 [2021-10-21 19:13:55,698 INFO L226 Difference]: Without dead ends: 200 [2021-10-21 19:13:55,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:13:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-21 19:13:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-10-21 19:13:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 195 states have (on average 1.2923076923076924) internal successors, (252), 198 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 252 transitions. [2021-10-21 19:13:55,722 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 252 transitions. Word has length 30 [2021-10-21 19:13:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:13:55,723 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 252 transitions. [2021-10-21 19:13:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:13:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 252 transitions. [2021-10-21 19:13:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:13:55,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:13:55,724 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:13:55,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:13:55,724 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:13:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:13:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash 932121604, now seen corresponding path program 1 times [2021-10-21 19:13:55,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:13:55,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321987821] [2021-10-21 19:13:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:55,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:13:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:55,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:13:55,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321987821] [2021-10-21 19:13:55,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321987821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:13:55,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965149379] [2021-10-21 19:13:55,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:13:55,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:13:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:13:55,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:13:55,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:13:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:13:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 19:13:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:13:56,788 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 [2021-10-21 19:13:56,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:13:56,848 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-21 19:13:56,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 45 [2021-10-21 19:13:56,860 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:13:56,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2021-10-21 19:13:56,970 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-10-21 19:13:56,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 65 [2021-10-21 19:13:58,113 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-10-21 19:13:58,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1234 treesize of output 869 [2021-10-21 19:13:58,136 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 995 treesize of output 987 [2021-10-21 19:13:58,157 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:13:58,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 984 treesize of output 986 [2021-10-21 19:13:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:13:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965149379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:13:58,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:13:58,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-10-21 19:13:58,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795999444] [2021-10-21 19:13:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:13:58,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:13:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:13:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:13:58,265 INFO L87 Difference]: Start difference. First operand 199 states and 252 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-10-21 19:14:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:14:01,753 INFO L93 Difference]: Finished difference Result 332 states and 399 transitions. [2021-10-21 19:14:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:14:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 30 [2021-10-21 19:14:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:14:01,755 INFO L225 Difference]: With dead ends: 332 [2021-10-21 19:14:01,755 INFO L226 Difference]: Without dead ends: 289 [2021-10-21 19:14:01,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 989.9ms TimeCoverageRelationStatistics Valid=329, Invalid=1231, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:14:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-21 19:14:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 202. [2021-10-21 19:14:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.2828282828282829) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:14:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-10-21 19:14:01,783 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 30 [2021-10-21 19:14:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:01,783 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-10-21 19:14:01,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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) [2021-10-21 19:14:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-10-21 19:14:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:14:01,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:14:01,784 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:14:01,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:14:01,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:14:02,000 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:14:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:14:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash 497486487, now seen corresponding path program 2 times [2021-10-21 19:14:02,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:14:02,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217623140] [2021-10-21 19:14:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:14:02,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:14:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:14:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:02,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:14:02,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217623140] [2021-10-21 19:14:02,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217623140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:14:02,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855551085] [2021-10-21 19:14:02,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:14:02,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:14:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:14:02,224 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:14:02,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:14:03,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:14:03,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:14:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-21 19:14:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:14:03,267 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 [2021-10-21 19:14:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:03,323 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:14:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:14:03,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:03,341 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:14:03,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 78 [2021-10-21 19:14:03,353 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:14:03,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:14:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:03,468 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:14:03,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 83 [2021-10-21 19:14:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:03,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:14:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 77 [2021-10-21 19:14:03,600 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:14:03,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 323 treesize of output 178 [2021-10-21 19:14:03,638 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:14:03,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 146 treesize of output 123 [2021-10-21 19:14:03,646 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-10-21 19:14:03,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 108 [2021-10-21 19:14:03,778 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:14:03,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 118 treesize of output 105 [2021-10-21 19:14:03,785 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-10-21 19:14:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 132 [2021-10-21 19:14:04,393 INFO L354 Elim1Store]: treesize reduction 166, result has 8.3 percent of original size [2021-10-21 19:14:04,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 184 treesize of output 112 [2021-10-21 19:14:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:04,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855551085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:14:04,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:14:04,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-21 19:14:04,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192585471] [2021-10-21 19:14:04,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:14:04,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:14:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:14:04,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:14:04,486 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:14:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:14:24,384 INFO L93 Difference]: Finished difference Result 305 states and 374 transitions. [2021-10-21 19:14:24,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:14:24,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 19:14:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:14:24,387 INFO L225 Difference]: With dead ends: 305 [2021-10-21 19:14:24,387 INFO L226 Difference]: Without dead ends: 259 [2021-10-21 19:14:24,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1074.4ms TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:14:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-21 19:14:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 204. [2021-10-21 19:14:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.28) internal successors, (256), 203 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:14:24,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 256 transitions. [2021-10-21 19:14:24,420 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 256 transitions. Word has length 31 [2021-10-21 19:14:24,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:14:24,420 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 256 transitions. [2021-10-21 19:14:24,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:14:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 256 transitions. [2021-10-21 19:14:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:14:24,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:14:24,421 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:14:24,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:14:24,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:14:24,636 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:14:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:14:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1359257348, now seen corresponding path program 3 times [2021-10-21 19:14:24,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:14:24,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358228783] [2021-10-21 19:14:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:14:24,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:14:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:14:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:25,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:14:25,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358228783] [2021-10-21 19:14:25,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358228783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:14:25,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084680329] [2021-10-21 19:14:25,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:14:25,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:14:25,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:14:25,111 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:14:25,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:14:26,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:14:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:14:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-21 19:14:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:14:26,758 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 [2021-10-21 19:14:26,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:26,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:26,826 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:14:26,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:14:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:26,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:26,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:26,848 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-21 19:14:26,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-10-21 19:14:26,863 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:14:26,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:14:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:14:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:14:27,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:27,221 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:14:27,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-10-21 19:14:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:27,261 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:14:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 152 treesize of output 129 [2021-10-21 19:14:27,281 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-21 19:14:27,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-10-21 19:14:27,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:27,446 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:14:27,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 131 treesize of output 110 [2021-10-21 19:14:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:27,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:27,456 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:14:27,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 112 treesize of output 108 [2021-10-21 19:14:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:14:27,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:27,778 INFO L354 Elim1Store]: treesize reduction 332, result has 13.3 percent of original size [2021-10-21 19:14:27,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 316 treesize of output 286 [2021-10-21 19:14:27,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:27,871 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:14:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 243 treesize of output 196 [2021-10-21 19:14:27,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 272 [2021-10-21 19:14:27,892 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-21 19:14:27,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 242 [2021-10-21 19:14:27,908 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-10-21 19:14:27,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 223 [2021-10-21 19:14:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:28,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:28,136 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-21 19:14:28,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 354 treesize of output 172 [2021-10-21 19:14:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:14:28,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:14:28,146 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-21 19:14:28,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 190 treesize of output 196 [2021-10-21 19:14:28,156 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:14:28,157 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 175 treesize of output 174 [2021-10-21 19:14:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:14:39,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084680329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:14:39,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:14:39,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-21 19:14:39,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509600646] [2021-10-21 19:14:39,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:14:39,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:14:39,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:14:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=319, Unknown=5, NotChecked=0, Total=380 [2021-10-21 19:14:39,298 INFO L87 Difference]: Start difference. First operand 204 states and 256 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:14,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:15:14,715 INFO L93 Difference]: Finished difference Result 317 states and 388 transitions. [2021-10-21 19:15:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:15:14,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 19:15:14,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:15:14,716 INFO L225 Difference]: With dead ends: 317 [2021-10-21 19:15:14,716 INFO L226 Difference]: Without dead ends: 263 [2021-10-21 19:15:14,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 18533.0ms TimeCoverageRelationStatistics Valid=117, Invalid=690, Unknown=5, NotChecked=0, Total=812 [2021-10-21 19:15:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-10-21 19:15:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 207. [2021-10-21 19:15:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 203 states have (on average 1.2807881773399015) internal successors, (260), 206 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2021-10-21 19:15:14,740 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 32 [2021-10-21 19:15:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:15:14,740 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2021-10-21 19:15:14,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2021-10-21 19:15:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:15:14,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:15:14,741 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:15:14,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:15:14,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:15:14,952 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:15:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:15:14,952 INFO L82 PathProgramCache]: Analyzing trace with hash -237453958, now seen corresponding path program 4 times [2021-10-21 19:15:14,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:15:14,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592346816] [2021-10-21 19:15:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:14,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:15:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:15,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:15:15,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592346816] [2021-10-21 19:15:15,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592346816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:15:15,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943415230] [2021-10-21 19:15:15,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:15:15,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:15:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:15:15,412 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:15:15,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:15:16,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:15:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:15:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-21 19:15:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:15:16,567 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 [2021-10-21 19:15:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,635 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:15:16,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:15:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:16,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,654 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:15:16,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 78 [2021-10-21 19:15:16,666 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:15:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:15:16,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:16,790 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:15:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 83 [2021-10-21 19:15:16,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:16,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:16,800 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:15:16,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 77 [2021-10-21 19:15:16,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:16,944 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:15:16,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-10-21 19:15:16,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:16,988 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:15:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 152 treesize of output 129 [2021-10-21 19:15:17,022 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-21 19:15:17,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-10-21 19:15:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:17,201 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:15:17,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 131 treesize of output 110 [2021-10-21 19:15:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:17,211 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:15:17,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 112 treesize of output 108 [2021-10-21 19:15:17,239 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 13 treesize of output 9 [2021-10-21 19:15:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:17,610 INFO L354 Elim1Store]: treesize reduction 260, result has 15.3 percent of original size [2021-10-21 19:15:17,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 498 treesize of output 242 [2021-10-21 19:15:17,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:17,714 INFO L354 Elim1Store]: treesize reduction 552, result has 12.5 percent of original size [2021-10-21 19:15:17,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 490 treesize of output 360 [2021-10-21 19:15:17,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 354 treesize of output 273 [2021-10-21 19:15:17,743 INFO L354 Elim1Store]: treesize reduction 60, result has 50.4 percent of original size [2021-10-21 19:15:17,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 255 treesize of output 283 [2021-10-21 19:15:17,754 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-21 19:15:17,755 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 271 treesize of output 259 [2021-10-21 19:15:17,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:18,060 INFO L354 Elim1Store]: treesize reduction 332, result has 14.4 percent of original size [2021-10-21 19:15:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 400 treesize of output 196 [2021-10-21 19:15:18,074 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-10-21 19:15:18,075 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 354 treesize of output 341 [2021-10-21 19:15:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:18,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:15:18,215 INFO L354 Elim1Store]: treesize reduction 788, result has 11.7 percent of original size [2021-10-21 19:15:18,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 338 treesize of output 310 [2021-10-21 19:15:35,344 INFO L354 Elim1Store]: treesize reduction 241, result has 9.1 percent of original size [2021-10-21 19:15:35,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 321 treesize of output 157 [2021-10-21 19:15:35,385 INFO L354 Elim1Store]: treesize reduction 234, result has 1.3 percent of original size [2021-10-21 19:15:35,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 142 treesize of output 103 [2021-10-21 19:15:35,457 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-21 19:15:35,457 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 28 treesize of output 14 [2021-10-21 19:15:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:35,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943415230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:15:35,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:15:35,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-10-21 19:15:35,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629230279] [2021-10-21 19:15:35,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:15:35,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:15:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:15:35,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=359, Unknown=3, NotChecked=0, Total=420 [2021-10-21 19:15:35,465 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:15:40,893 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2021-10-21 19:15:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-21 19:15:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-21 19:15:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:15:40,895 INFO L225 Difference]: With dead ends: 338 [2021-10-21 19:15:40,895 INFO L226 Difference]: Without dead ends: 336 [2021-10-21 19:15:40,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 10034.1ms TimeCoverageRelationStatistics Valid=184, Invalid=1453, Unknown=3, NotChecked=0, Total=1640 [2021-10-21 19:15:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-10-21 19:15:40,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 217. [2021-10-21 19:15:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.2863849765258215) internal successors, (274), 216 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 274 transitions. [2021-10-21 19:15:40,933 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 274 transitions. Word has length 32 [2021-10-21 19:15:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:15:40,933 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 274 transitions. [2021-10-21 19:15:40,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:40,934 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 274 transitions. [2021-10-21 19:15:40,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:15:40,934 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:15:40,935 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:15:40,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-21 19:15:41,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:15:41,135 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:15:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:15:41,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1429704627, now seen corresponding path program 1 times [2021-10-21 19:15:41,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:15:41,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078528896] [2021-10-21 19:15:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:41,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:15:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:41,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:15:41,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078528896] [2021-10-21 19:15:41,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078528896] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:15:41,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361654586] [2021-10-21 19:15:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:41,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:15:41,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:15:41,313 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:15:41,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:15:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:15:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:15:42,551 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 [2021-10-21 19:15:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:42,631 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-21 19:15:42,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 45 [2021-10-21 19:15:42,643 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:15:42,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 58 [2021-10-21 19:15:42,741 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-10-21 19:15:42,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 65 [2021-10-21 19:15:43,879 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 1166 treesize of output 1126 [2021-10-21 19:15:43,934 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-10-21 19:15:43,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1610 treesize of output 1181 [2021-10-21 19:15:43,958 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:15:43,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1172 treesize of output 1174 [2021-10-21 19:15:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:44,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361654586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:15:44,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:15:44,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-21 19:15:44,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463924242] [2021-10-21 19:15:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:15:44,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:15:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:15:44,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:15:44,089 INFO L87 Difference]: Start difference. First operand 217 states and 274 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:15:46,386 INFO L93 Difference]: Finished difference Result 342 states and 412 transitions. [2021-10-21 19:15:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:15:46,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 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 33 [2021-10-21 19:15:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:15:46,388 INFO L225 Difference]: With dead ends: 342 [2021-10-21 19:15:46,388 INFO L226 Difference]: Without dead ends: 302 [2021-10-21 19:15:46,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1028.9ms TimeCoverageRelationStatistics Valid=330, Invalid=1230, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:15:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-21 19:15:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 217. [2021-10-21 19:15:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.2816901408450705) internal successors, (273), 216 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 273 transitions. [2021-10-21 19:15:46,421 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 273 transitions. Word has length 33 [2021-10-21 19:15:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:15:46,422 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 273 transitions. [2021-10-21 19:15:46,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:15:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 273 transitions. [2021-10-21 19:15:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:15:46,423 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:15:46,423 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:15:46,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:15:46,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:15:46,628 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:15:46,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:15:46,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1373256028, now seen corresponding path program 1 times [2021-10-21 19:15:46,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:15:46,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608944525] [2021-10-21 19:15:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:46,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:15:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:46,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:15:46,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608944525] [2021-10-21 19:15:46,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608944525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:15:46,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702659992] [2021-10-21 19:15:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:15:46,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:15:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:15:46,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:15:46,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:15:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:15:48,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:15:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:15:48,250 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 [2021-10-21 19:15:48,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,306 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:15:48,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:15:48,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,323 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-21 19:15:48,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-10-21 19:15:48,335 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:15:48,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:15:48,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:15:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:15:48,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:15:48,616 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:15:48,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 323 treesize of output 178 [2021-10-21 19:15:48,697 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-10-21 19:15:48,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 239 treesize of output 147 [2021-10-21 19:15:48,705 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-10-21 19:15:48,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 138 treesize of output 132 [2021-10-21 19:15:48,820 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:15:48,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 195 treesize of output 116 [2021-10-21 19:15:48,842 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-10-21 19:15:48,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 132 [2021-10-21 19:15:49,697 INFO L354 Elim1Store]: treesize reduction 166, result has 8.3 percent of original size [2021-10-21 19:15:49,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 250 treesize of output 128 [2021-10-21 19:15:49,725 INFO L354 Elim1Store]: treesize reduction 142, result has 4.7 percent of original size [2021-10-21 19:15:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 53 [2021-10-21 19:15:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:15:49,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702659992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:15:49,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:15:49,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-21 19:15:49,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549884067] [2021-10-21 19:15:49,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:15:49,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:15:49,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:15:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:15:49,737 INFO L87 Difference]: Start difference. First operand 217 states and 273 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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) [2021-10-21 19:16:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:10,663 INFO L93 Difference]: Finished difference Result 307 states and 378 transitions. [2021-10-21 19:16:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:16:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:16:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:10,665 INFO L225 Difference]: With dead ends: 307 [2021-10-21 19:16:10,665 INFO L226 Difference]: Without dead ends: 267 [2021-10-21 19:16:10,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 881.0ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:16:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-21 19:16:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 229. [2021-10-21 19:16:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.2844444444444445) internal successors, (289), 228 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2021-10-21 19:16:10,707 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 34 [2021-10-21 19:16:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:10,707 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2021-10-21 19:16:10,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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) [2021-10-21 19:16:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2021-10-21 19:16:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:16:10,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:10,708 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:10,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:10,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:16:10,908 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:16:10,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:10,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1159083761, now seen corresponding path program 1 times [2021-10-21 19:16:10,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:10,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713385346] [2021-10-21 19:16:10,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:10,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:11,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:11,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713385346] [2021-10-21 19:16:11,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713385346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:11,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562321332] [2021-10-21 19:16:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:11,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:11,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:11,372 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:11,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:16:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-21 19:16:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:12,794 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 [2021-10-21 19:16:12,797 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 [2021-10-21 19:16:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:12,883 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:16:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 223 treesize of output 185 [2021-10-21 19:16:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:12,908 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:16:12,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 194 treesize of output 144 [2021-10-21 19:16:12,925 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:16:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 148 [2021-10-21 19:16:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:12,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 110 [2021-10-21 19:16:12,941 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-21 19:16:12,942 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 100 treesize of output 88 [2021-10-21 19:16:13,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:13,070 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-21 19:16:13,070 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 23 treesize of output 22 [2021-10-21 19:16:13,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:13,084 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:16:13,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 83 [2021-10-21 19:16:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:13,092 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:16:13,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-10-21 19:16:13,348 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-10-21 19:16:13,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 355 treesize of output 218 [2021-10-21 19:16:13,406 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-10-21 19:16:13,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 355 treesize of output 263 [2021-10-21 19:16:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:13,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:13,416 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:16:13,416 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 1 case distinctions, treesize of input 254 treesize of output 233 [2021-10-21 19:16:13,445 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-10-21 19:16:13,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 250 [2021-10-21 19:16:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:13,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:13,452 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:16:13,453 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 1 case distinctions, treesize of input 241 treesize of output 208 [2021-10-21 19:16:13,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:13,472 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-10-21 19:16:13,472 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 202 treesize of output 193 [2021-10-21 19:16:13,750 INFO L354 Elim1Store]: treesize reduction 208, result has 16.8 percent of original size [2021-10-21 19:16:13,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 294 treesize of output 177 [2021-10-21 19:16:13,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:13,773 INFO L354 Elim1Store]: treesize reduction 118, result has 15.1 percent of original size [2021-10-21 19:16:13,773 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 260 treesize of output 254 [2021-10-21 19:16:13,821 INFO L354 Elim1Store]: treesize reduction 384, result has 14.7 percent of original size [2021-10-21 19:16:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 248 treesize of output 226 [2021-10-21 19:16:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:15,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:16:15,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 85 [2021-10-21 19:16:16,108 INFO L354 Elim1Store]: treesize reduction 649, result has 7.4 percent of original size [2021-10-21 19:16:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 219 treesize of output 180 [2021-10-21 19:16:16,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:16,171 INFO L354 Elim1Store]: treesize reduction 386, result has 10.9 percent of original size [2021-10-21 19:16:16,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 214 treesize of output 212 [2021-10-21 19:16:16,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:16,215 INFO L354 Elim1Store]: treesize reduction 302, result has 13.5 percent of original size [2021-10-21 19:16:16,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 196 [2021-10-21 19:16:16,234 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-10-21 19:16:16,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 188 [2021-10-21 19:16:16,472 INFO L354 Elim1Store]: treesize reduction 188, result has 6.5 percent of original size [2021-10-21 19:16:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 274 treesize of output 154 [2021-10-21 19:16:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:16,579 INFO L354 Elim1Store]: treesize reduction 422, result has 12.1 percent of original size [2021-10-21 19:16:16,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 137 treesize of output 129 [2021-10-21 19:16:16,593 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 104 treesize of output 100 [2021-10-21 19:16:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:16,618 INFO L354 Elim1Store]: treesize reduction 152, result has 11.1 percent of original size [2021-10-21 19:16:16,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 100 treesize of output 97 [2021-10-21 19:16:16,948 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:16:16,948 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 43 treesize of output 25 [2021-10-21 19:16:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:16,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562321332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:16,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:16,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-21 19:16:16,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127580451] [2021-10-21 19:16:16,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:16:16,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:16:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:16:16,955 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:16:37,040 INFO L93 Difference]: Finished difference Result 555 states and 662 transitions. [2021-10-21 19:16:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-21 19:16:37,041 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 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 34 [2021-10-21 19:16:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:16:37,043 INFO L225 Difference]: With dead ends: 555 [2021-10-21 19:16:37,043 INFO L226 Difference]: Without dead ends: 532 [2021-10-21 19:16:37,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 7492.0ms TimeCoverageRelationStatistics Valid=535, Invalid=2768, Unknown=3, NotChecked=0, Total=3306 [2021-10-21 19:16:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-10-21 19:16:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 252. [2021-10-21 19:16:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.282258064516129) internal successors, (318), 251 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 318 transitions. [2021-10-21 19:16:37,092 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 318 transitions. Word has length 34 [2021-10-21 19:16:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:16:37,092 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 318 transitions. [2021-10-21 19:16:37,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:16:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 318 transitions. [2021-10-21 19:16:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-21 19:16:37,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:16:37,094 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:16:37,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:16:37,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:16:37,320 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:16:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:16:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash -927068628, now seen corresponding path program 5 times [2021-10-21 19:16:37,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:16:37,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161064612] [2021-10-21 19:16:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:16:37,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:16:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:16:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:37,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:16:37,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161064612] [2021-10-21 19:16:37,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161064612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:37,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550130875] [2021-10-21 19:16:37,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:16:37,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:16:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:16:37,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:16:37,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:16:39,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:16:39,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:16:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-21 19:16:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:16:39,677 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 [2021-10-21 19:16:39,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:39,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,737 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:16:39,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:16:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,754 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:16:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:16:39,767 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:16:39,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:16:39,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:39,890 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:16:39,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 96 [2021-10-21 19:16:39,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:39,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:39,899 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:16:39,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 64 [2021-10-21 19:16:39,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,037 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:16:40,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-10-21 19:16:40,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,076 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:16:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 152 treesize of output 129 [2021-10-21 19:16:40,096 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-21 19:16:40,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 127 [2021-10-21 19:16:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,323 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:16:40,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 131 treesize of output 110 [2021-10-21 19:16:40,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,338 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:16:40,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 112 treesize of output 108 [2021-10-21 19:16:40,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,573 INFO L354 Elim1Store]: treesize reduction 332, result has 13.3 percent of original size [2021-10-21 19:16:40,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 264 treesize of output 234 [2021-10-21 19:16:40,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,673 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:16:40,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 191 treesize of output 144 [2021-10-21 19:16:40,685 INFO L354 Elim1Store]: treesize reduction 69, result has 5.5 percent of original size [2021-10-21 19:16:40,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 152 [2021-10-21 19:16:40,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,946 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-21 19:16:40,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 178 treesize of output 154 [2021-10-21 19:16:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:16:40,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:16:40,964 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-21 19:16:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 179 treesize of output 185 [2021-10-21 19:16:40,970 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 164 treesize of output 160 [2021-10-21 19:16:46,559 INFO L354 Elim1Store]: treesize reduction 278, result has 7.6 percent of original size [2021-10-21 19:16:46,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 486 treesize of output 180 [2021-10-21 19:16:46,613 INFO L354 Elim1Store]: treesize reduction 278, result has 2.5 percent of original size [2021-10-21 19:16:46,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 74 [2021-10-21 19:16:46,647 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 [2021-10-21 19:16:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:16:46,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550130875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:16:46,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:16:46,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2021-10-21 19:16:46,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961589676] [2021-10-21 19:16:46,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:16:46,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:16:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:16:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=442, Unknown=1, NotChecked=0, Total=506 [2021-10-21 19:16:46,653 INFO L87 Difference]: Start difference. First operand 252 states and 318 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:19:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:19:48,176 INFO L93 Difference]: Finished difference Result 393 states and 486 transitions. [2021-10-21 19:19:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-21 19:19:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-21 19:19:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:19:48,179 INFO L225 Difference]: With dead ends: 393 [2021-10-21 19:19:48,179 INFO L226 Difference]: Without dead ends: 391 [2021-10-21 19:19:48,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 46577.4ms TimeCoverageRelationStatistics Valid=345, Invalid=2949, Unknown=12, NotChecked=0, Total=3306 [2021-10-21 19:19:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-10-21 19:19:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 267. [2021-10-21 19:19:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 263 states have (on average 1.296577946768061) internal successors, (341), 266 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:19:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 341 transitions. [2021-10-21 19:19:48,261 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 341 transitions. Word has length 35 [2021-10-21 19:19:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:19:48,262 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 341 transitions. [2021-10-21 19:19:48,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:19:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 341 transitions. [2021-10-21 19:19:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:19:48,266 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:19:48,266 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:19:48,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:19:48,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:19:48,480 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:19:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:19:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1724174343, now seen corresponding path program 6 times [2021-10-21 19:19:48,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:19:48,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353286214] [2021-10-21 19:19:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:19:48,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:19:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:19:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:19:49,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:19:49,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353286214] [2021-10-21 19:19:49,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353286214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:19:49,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658693002] [2021-10-21 19:19:49,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:19:49,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:19:49,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:19:49,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:19:49,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:19:51,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 19:19:51,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:19:51,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-21 19:19:51,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:19:51,480 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 [2021-10-21 19:19:51,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,547 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:19:51,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:19:51,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:51,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,566 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-21 19:19:51,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-10-21 19:19:51,578 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:19:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:19:51,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:19:51,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:51,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:19:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:51,857 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:19:51,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-10-21 19:19:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:51,905 INFO L354 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2021-10-21 19:19:51,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 276 treesize of output 164 [2021-10-21 19:19:51,927 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-21 19:19:51,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 162 [2021-10-21 19:19:52,113 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 [2021-10-21 19:19:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:52,132 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:19:52,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 171 treesize of output 122 [2021-10-21 19:19:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:52,143 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-10-21 19:19:52,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 152 [2021-10-21 19:19:52,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:52,571 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:19:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 578 treesize of output 278 [2021-10-21 19:19:52,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:52,672 INFO L354 Elim1Store]: treesize reduction 460, result has 12.7 percent of original size [2021-10-21 19:19:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 326 treesize of output 293 [2021-10-21 19:19:52,677 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 278 treesize of output 242 [2021-10-21 19:19:52,699 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-21 19:19:52,699 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 2 case distinctions, treesize of input 227 treesize of output 219 [2021-10-21 19:19:52,732 INFO L354 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2021-10-21 19:19:52,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 209 treesize of output 219 [2021-10-21 19:19:52,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:52,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:53,003 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-10-21 19:19:53,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 241 treesize of output 173 [2021-10-21 19:19:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:53,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:53,018 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-10-21 19:19:53,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 194 treesize of output 196 [2021-10-21 19:19:53,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:53,030 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:19:53,031 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 1 case distinctions, treesize of input 175 treesize of output 174 [2021-10-21 19:19:53,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:53,686 INFO L354 Elim1Store]: treesize reduction 396, result has 12.6 percent of original size [2021-10-21 19:19:53,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 385 treesize of output 319 [2021-10-21 19:19:53,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:53,837 INFO L354 Elim1Store]: treesize reduction 700, result has 11.3 percent of original size [2021-10-21 19:19:53,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 30 case distinctions, treesize of input 361 treesize of output 350 [2021-10-21 19:19:53,913 INFO L354 Elim1Store]: treesize reduction 172, result has 20.7 percent of original size [2021-10-21 19:19:53,913 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 5 case distinctions, treesize of input 322 treesize of output 296 [2021-10-21 19:19:53,936 INFO L354 Elim1Store]: treesize reduction 141, result has 2.8 percent of original size [2021-10-21 19:19:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 250 [2021-10-21 19:19:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:54,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:54,333 INFO L354 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2021-10-21 19:19:54,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 261 treesize of output 202 [2021-10-21 19:19:54,357 INFO L354 Elim1Store]: treesize reduction 184, result has 16.0 percent of original size [2021-10-21 19:19:54,357 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 435 treesize of output 421 [2021-10-21 19:19:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:19:54,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:19:54,382 INFO L354 Elim1Store]: treesize reduction 408, result has 0.2 percent of original size [2021-10-21 19:19:54,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 415 treesize of output 379 [2021-10-21 19:20:00,188 INFO L354 Elim1Store]: treesize reduction 196, result has 1.5 percent of original size [2021-10-21 19:20:00,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 401 treesize of output 328 [2021-10-21 19:20:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:20:00,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658693002] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:20:00,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:20:00,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-10-21 19:20:00,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100086940] [2021-10-21 19:20:00,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 19:20:00,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:20:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 19:20:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=765, Unknown=1, NotChecked=0, Total=870 [2021-10-21 19:20:00,410 INFO L87 Difference]: Start difference. First operand 267 states and 341 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:20:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:20:28,444 INFO L93 Difference]: Finished difference Result 605 states and 768 transitions. [2021-10-21 19:20:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 19:20:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-21 19:20:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:20:28,447 INFO L225 Difference]: With dead ends: 605 [2021-10-21 19:20:28,447 INFO L226 Difference]: Without dead ends: 545 [2021-10-21 19:20:28,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 11604.9ms TimeCoverageRelationStatistics Valid=539, Invalid=4862, Unknown=1, NotChecked=0, Total=5402 [2021-10-21 19:20:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-10-21 19:20:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 318. [2021-10-21 19:20:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 314 states have (on average 1.3152866242038217) internal successors, (413), 317 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:20:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 413 transitions. [2021-10-21 19:20:28,499 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 413 transitions. Word has length 36 [2021-10-21 19:20:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:20:28,499 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 413 transitions. [2021-10-21 19:20:28,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 30 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:20:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 413 transitions. [2021-10-21 19:20:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:20:28,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:20:28,500 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:20:28,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:20:28,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:20:28,701 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:20:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:20:28,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1298209283, now seen corresponding path program 7 times [2021-10-21 19:20:28,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:20:28,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257705524] [2021-10-21 19:20:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:20:28,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:20:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:20:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:20:29,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:20:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257705524] [2021-10-21 19:20:29,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257705524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:20:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546139465] [2021-10-21 19:20:29,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:20:29,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:20:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:20:29,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:20:29,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:20:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:20:31,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-21 19:20:31,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:20:31,373 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 [2021-10-21 19:20:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,430 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:20:31,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:20:31,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,448 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:20:31,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:20:31,461 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:20:31,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:20:31,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:20:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:31,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:20:31,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:31,741 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:20:31,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-10-21 19:20:31,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:31,806 INFO L354 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2021-10-21 19:20:31,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 276 treesize of output 164 [2021-10-21 19:20:31,828 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-21 19:20:31,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 162 [2021-10-21 19:20:32,094 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 [2021-10-21 19:20:32,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:32,106 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:20:32,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 171 treesize of output 122 [2021-10-21 19:20:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:32,117 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-10-21 19:20:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 149 [2021-10-21 19:20:32,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:32,546 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:20:32,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 575 treesize of output 275 [2021-10-21 19:20:32,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:32,644 INFO L354 Elim1Store]: treesize reduction 460, result has 12.7 percent of original size [2021-10-21 19:20:32,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 326 treesize of output 293 [2021-10-21 19:20:32,650 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 278 treesize of output 242 [2021-10-21 19:20:32,655 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 239 treesize of output 227 [2021-10-21 19:20:32,667 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-21 19:20:32,667 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 224 treesize of output 212 [2021-10-21 19:20:32,700 INFO L354 Elim1Store]: treesize reduction 158, result has 16.8 percent of original size [2021-10-21 19:20:32,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 209 treesize of output 219 [2021-10-21 19:20:32,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:32,983 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-10-21 19:20:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 241 treesize of output 173 [2021-10-21 19:20:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:33,011 INFO L354 Elim1Store]: treesize reduction 124, result has 0.8 percent of original size [2021-10-21 19:20:33,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 222 treesize of output 224 [2021-10-21 19:20:33,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:33,030 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-10-21 19:20:33,030 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 1 case distinctions, treesize of input 203 treesize of output 202 [2021-10-21 19:20:33,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:33,654 INFO L354 Elim1Store]: treesize reduction 392, result has 13.5 percent of original size [2021-10-21 19:20:33,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 703 treesize of output 292 [2021-10-21 19:20:33,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:33,825 INFO L354 Elim1Store]: treesize reduction 708, result has 11.2 percent of original size [2021-10-21 19:20:33,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 30 case distinctions, treesize of input 385 treesize of output 358 [2021-10-21 19:20:33,840 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-10-21 19:20:33,841 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 346 treesize of output 304 [2021-10-21 19:20:33,867 INFO L354 Elim1Store]: treesize reduction 112, result has 19.4 percent of original size [2021-10-21 19:20:33,868 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 283 treesize of output 274 [2021-10-21 19:20:33,906 INFO L354 Elim1Store]: treesize reduction 112, result has 22.8 percent of original size [2021-10-21 19:20:33,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 268 treesize of output 274 [2021-10-21 19:20:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:34,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:34,534 INFO L354 Elim1Store]: treesize reduction 472, result has 12.9 percent of original size [2021-10-21 19:20:34,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 347 treesize of output 241 [2021-10-21 19:20:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:20:34,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:20:34,683 INFO L354 Elim1Store]: treesize reduction 1368, result has 9.9 percent of original size [2021-10-21 19:20:34,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 522 treesize of output 488 [2021-10-21 19:20:34,706 INFO L354 Elim1Store]: treesize reduction 208, result has 14.4 percent of original size [2021-10-21 19:20:34,706 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 461 treesize of output 447 [2021-10-21 19:20:55,145 INFO L354 Elim1Store]: treesize reduction 349, result has 9.4 percent of original size [2021-10-21 19:20:55,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 473 treesize of output 200 [2021-10-21 19:20:55,216 INFO L354 Elim1Store]: treesize reduction 346, result has 0.9 percent of original size [2021-10-21 19:20:55,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 179 treesize of output 132 [2021-10-21 19:20:55,343 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:20:55,343 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 43 treesize of output 25 [2021-10-21 19:20:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:20:55,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546139465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:20:55,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:20:55,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-10-21 19:20:55,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755480106] [2021-10-21 19:20:55,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:20:55,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:20:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:20:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=517, Unknown=2, NotChecked=0, Total=600 [2021-10-21 19:20:55,351 INFO L87 Difference]: Start difference. First operand 318 states and 413 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:07,176 INFO L93 Difference]: Finished difference Result 517 states and 667 transitions. [2021-10-21 19:21:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:21:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-21 19:21:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:07,179 INFO L225 Difference]: With dead ends: 517 [2021-10-21 19:21:07,179 INFO L226 Difference]: Without dead ends: 515 [2021-10-21 19:21:07,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 7816.6ms TimeCoverageRelationStatistics Valid=276, Invalid=2374, Unknown=2, NotChecked=0, Total=2652 [2021-10-21 19:21:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-10-21 19:21:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 338. [2021-10-21 19:21:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 334 states have (on average 1.3233532934131738) internal successors, (442), 337 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 442 transitions. [2021-10-21 19:21:07,256 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 442 transitions. Word has length 36 [2021-10-21 19:21:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:07,257 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 442 transitions. [2021-10-21 19:21:07,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 442 transitions. [2021-10-21 19:21:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:21:07,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:07,258 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:07,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:21:07,475 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:21:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:07,476 INFO L82 PathProgramCache]: Analyzing trace with hash 280130149, now seen corresponding path program 1 times [2021-10-21 19:21:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:07,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103659446] [2021-10-21 19:21:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:07,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:07,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:07,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103659446] [2021-10-21 19:21:07,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103659446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:07,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134985359] [2021-10-21 19:21:07,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:07,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:07,840 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:07,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:21:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-21 19:21:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:09,970 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 [2021-10-21 19:21:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,028 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-21 19:21:10,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 45 [2021-10-21 19:21:10,042 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:21:10,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 58 [2021-10-21 19:21:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,235 INFO L354 Elim1Store]: treesize reduction 100, result has 21.9 percent of original size [2021-10-21 19:21:10,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 65 [2021-10-21 19:21:10,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,896 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 40 treesize of output 29 [2021-10-21 19:21:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,900 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 29 treesize of output 13 [2021-10-21 19:21:10,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:10,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:10,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:10,976 INFO L354 Elim1Store]: treesize reduction 155, result has 12.4 percent of original size [2021-10-21 19:21:10,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 84 [2021-10-21 19:21:10,994 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-21 19:21:10,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 77 [2021-10-21 19:21:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:11,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:11,468 INFO L354 Elim1Store]: treesize reduction 558, result has 18.5 percent of original size [2021-10-21 19:21:11,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 585 treesize of output 396 [2021-10-21 19:21:11,513 INFO L354 Elim1Store]: treesize reduction 146, result has 18.4 percent of original size [2021-10-21 19:21:11,514 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 2 case distinctions, treesize of input 655 treesize of output 592 [2021-10-21 19:21:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:11,580 INFO L354 Elim1Store]: treesize reduction 292, result has 15.4 percent of original size [2021-10-21 19:21:11,581 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 4 case distinctions, treesize of input 717 treesize of output 420 [2021-10-21 19:21:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:11,605 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 504 treesize of output 492 [2021-10-21 19:21:11,874 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 0 case distinctions, treesize of input 44 treesize of output 10 [2021-10-21 19:21:12,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:12,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:12,072 INFO L354 Elim1Store]: treesize reduction 59, result has 14.5 percent of original size [2021-10-21 19:21:12,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 333 treesize of output 188 [2021-10-21 19:21:12,845 INFO L354 Elim1Store]: treesize reduction 86, result has 21.1 percent of original size [2021-10-21 19:21:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 202 treesize of output 121 [2021-10-21 19:21:12,852 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:21:12,853 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 107 treesize of output 78 [2021-10-21 19:21:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:12,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134985359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:12,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:12,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-21 19:21:12,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370659613] [2021-10-21 19:21:12,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:21:12,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:21:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:21:12,921 INFO L87 Difference]: Start difference. First operand 338 states and 442 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:15,188 INFO L93 Difference]: Finished difference Result 489 states and 609 transitions. [2021-10-21 19:21:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-21 19:21:15,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-21 19:21:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:15,191 INFO L225 Difference]: With dead ends: 489 [2021-10-21 19:21:15,191 INFO L226 Difference]: Without dead ends: 463 [2021-10-21 19:21:15,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1704.6ms TimeCoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:21:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-10-21 19:21:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 357. [2021-10-21 19:21:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.3087818696883853) internal successors, (462), 356 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 462 transitions. [2021-10-21 19:21:15,249 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 462 transitions. Word has length 36 [2021-10-21 19:21:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:15,249 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 462 transitions. [2021-10-21 19:21:15,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 462 transitions. [2021-10-21 19:21:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:21:15,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:15,250 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:15,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-21 19:21:15,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:21:15,451 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:21:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1326300785, now seen corresponding path program 1 times [2021-10-21 19:21:15,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:15,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339876317] [2021-10-21 19:21:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:15,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 19:21:15,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:15,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339876317] [2021-10-21 19:21:15,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339876317] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:15,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:15,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:21:15,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013119228] [2021-10-21 19:21:15,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:21:15,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:21:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:21:15,516 INFO L87 Difference]: Start difference. First operand 357 states and 462 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:15,703 INFO L93 Difference]: Finished difference Result 358 states and 463 transitions. [2021-10-21 19:21:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:21:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-21 19:21:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:15,706 INFO L225 Difference]: With dead ends: 358 [2021-10-21 19:21:15,706 INFO L226 Difference]: Without dead ends: 356 [2021-10-21 19:21:15,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:21:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-10-21 19:21:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 351. [2021-10-21 19:21:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 348 states have (on average 1.3103448275862069) internal successors, (456), 350 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2021-10-21 19:21:15,818 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 456 transitions. Word has length 36 [2021-10-21 19:21:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:15,818 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 456 transitions. [2021-10-21 19:21:15,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:21:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 456 transitions. [2021-10-21 19:21:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:21:15,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:15,820 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:15,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-21 19:21:15,821 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:21:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash -116598954, now seen corresponding path program 3 times [2021-10-21 19:21:15,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:15,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683664985] [2021-10-21 19:21:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:15,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:21:16,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:16,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683664985] [2021-10-21 19:21:16,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683664985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:16,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215051232] [2021-10-21 19:21:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:21:16,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:16,856 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:16,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:21:25,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:21:25,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:21:25,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-21 19:21:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:25,233 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 [2021-10-21 19:21:25,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:25,288 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:21:25,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:21:25,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:25,312 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:21:25,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 78 [2021-10-21 19:21:25,328 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:21:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:21:25,454 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 [2021-10-21 19:21:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:25,468 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:21:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 83 [2021-10-21 19:21:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:25,476 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:21:25,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-10-21 19:21:25,733 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:21:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 397 treesize of output 236 [2021-10-21 19:21:25,796 INFO L354 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2021-10-21 19:21:25,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 372 treesize of output 260 [2021-10-21 19:21:25,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 203 [2021-10-21 19:21:25,846 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-21 19:21:25,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 185 treesize of output 192 [2021-10-21 19:21:25,858 INFO L354 Elim1Store]: treesize reduction 53, result has 22.1 percent of original size [2021-10-21 19:21:25,859 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 183 treesize of output 171 [2021-10-21 19:21:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:26,074 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:21:26,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 199 treesize of output 142 [2021-10-21 19:21:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:26,085 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-10-21 19:21:26,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 145 treesize of output 141 [2021-10-21 19:21:26,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:26,098 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:21:26,098 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 126 treesize of output 125 [2021-10-21 19:21:26,537 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:21:26,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 586 treesize of output 282 [2021-10-21 19:21:26,635 INFO L354 Elim1Store]: treesize reduction 392, result has 13.1 percent of original size [2021-10-21 19:21:26,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 281 treesize of output 264 [2021-10-21 19:21:26,643 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:21:26,644 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 1 case distinctions, treesize of input 249 treesize of output 228 [2021-10-21 19:21:26,685 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-10-21 19:21:26,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 222 treesize of output 232 [2021-10-21 19:21:26,692 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:21:26,693 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 1 case distinctions, treesize of input 220 treesize of output 211 [2021-10-21 19:21:26,711 INFO L354 Elim1Store]: treesize reduction 96, result has 19.3 percent of original size [2021-10-21 19:21:26,711 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 205 treesize of output 196 [2021-10-21 19:21:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:27,018 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-10-21 19:21:27,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 224 treesize of output 180 [2021-10-21 19:21:27,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:27,031 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-10-21 19:21:27,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 205 treesize of output 207 [2021-10-21 19:21:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:27,052 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-21 19:21:27,052 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 3 case distinctions, treesize of input 186 treesize of output 188 [2021-10-21 19:21:27,657 INFO L354 Elim1Store]: treesize reduction 548, result has 11.8 percent of original size [2021-10-21 19:21:27,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 30 case distinctions, treesize of input 402 treesize of output 378 [2021-10-21 19:21:27,808 INFO L354 Elim1Store]: treesize reduction 396, result has 12.6 percent of original size [2021-10-21 19:21:27,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 329 treesize of output 259 [2021-10-21 19:21:27,828 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-21 19:21:27,828 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 3 case distinctions, treesize of input 394 treesize of output 376 [2021-10-21 19:21:27,839 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-21 19:21:27,839 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 3 case distinctions, treesize of input 367 treesize of output 361 [2021-10-21 19:21:27,875 INFO L354 Elim1Store]: treesize reduction 228, result has 16.8 percent of original size [2021-10-21 19:21:27,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 352 treesize of output 346 [2021-10-21 19:21:27,928 INFO L354 Elim1Store]: treesize reduction 300, result has 14.0 percent of original size [2021-10-21 19:21:27,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 337 treesize of output 350 [2021-10-21 19:21:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:28,316 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-10-21 19:21:28,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 33 case distinctions, treesize of input 357 treesize of output 226 [2021-10-21 19:21:28,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:28,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:28,349 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-10-21 19:21:28,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 338 treesize of output 346 [2021-10-21 19:21:28,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:28,394 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-10-21 19:21:28,395 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 319 treesize of output 324 [2021-10-21 19:21:29,271 INFO L354 Elim1Store]: treesize reduction 1048, result has 10.2 percent of original size [2021-10-21 19:21:29,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 47 case distinctions, treesize of input 529 treesize of output 511 [2021-10-21 19:21:29,540 INFO L354 Elim1Store]: treesize reduction 544, result has 11.5 percent of original size [2021-10-21 19:21:29,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 47 case distinctions, treesize of input 456 treesize of output 299 [2021-10-21 19:21:29,597 INFO L354 Elim1Store]: treesize reduction 341, result has 5.5 percent of original size [2021-10-21 19:21:29,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 596 treesize of output 556 [2021-10-21 19:21:29,612 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-10-21 19:21:29,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 538 treesize of output 499 [2021-10-21 19:21:29,626 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-10-21 19:21:29,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 487 treesize of output 436 [2021-10-21 19:21:29,679 INFO L354 Elim1Store]: treesize reduction 352, result has 14.8 percent of original size [2021-10-21 19:21:29,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 424 treesize of output 421 [2021-10-21 19:21:30,330 INFO L354 Elim1Store]: treesize reduction 200, result has 0.5 percent of original size [2021-10-21 19:21:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 588 treesize of output 265 [2021-10-21 19:21:30,368 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-10-21 19:21:30,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 336 treesize of output 354 [2021-10-21 19:21:30,423 INFO L354 Elim1Store]: treesize reduction 256, result has 17.2 percent of original size [2021-10-21 19:21:30,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 321 treesize of output 329 [2021-10-21 19:21:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215051232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:33,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:33,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-10-21 19:21:33,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368222250] [2021-10-21 19:21:33,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:21:33,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:33,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:21:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:21:33,231 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:22:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:28,486 INFO L93 Difference]: Finished difference Result 623 states and 807 transitions. [2021-10-21 19:22:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 19:22:28,487 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 19:22:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:28,490 INFO L225 Difference]: With dead ends: 623 [2021-10-21 19:22:28,490 INFO L226 Difference]: Without dead ends: 547 [2021-10-21 19:22:28,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 4849.2ms TimeCoverageRelationStatistics Valid=684, Invalid=4286, Unknown=0, NotChecked=0, Total=4970 [2021-10-21 19:22:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-10-21 19:22:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 373. [2021-10-21 19:22:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 370 states have (on average 1.3108108108108107) internal successors, (485), 372 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:22:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 485 transitions. [2021-10-21 19:22:28,575 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 485 transitions. Word has length 37 [2021-10-21 19:22:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:28,576 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 485 transitions. [2021-10-21 19:22:28,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:22:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 485 transitions. [2021-10-21 19:22:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:22:28,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:28,578 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:22:28,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:28,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:28,781 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:22:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:28,782 INFO L82 PathProgramCache]: Analyzing trace with hash 445080437, now seen corresponding path program 1 times [2021-10-21 19:22:28,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:28,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376638282] [2021-10-21 19:22:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:28,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:29,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:29,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376638282] [2021-10-21 19:22:29,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376638282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:29,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225317108] [2021-10-21 19:22:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:29,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:29,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:29,094 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:29,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:22:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-21 19:22:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:31,501 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 [2021-10-21 19:22:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:31,569 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:22:31,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:22:31,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:31,588 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-21 19:22:31,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-10-21 19:22:31,601 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:22:31,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:22:31,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:31,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:31,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:22:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:31,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:31,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:22:31,868 INFO L354 Elim1Store]: treesize reduction 144, result has 18.6 percent of original size [2021-10-21 19:22:31,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 278 treesize of output 157 [2021-10-21 19:22:31,914 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:22:31,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 153 treesize of output 130 [2021-10-21 19:22:31,937 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-10-21 19:22:31,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 136 [2021-10-21 19:22:32,185 INFO L354 Elim1Store]: treesize reduction 208, result has 16.8 percent of original size [2021-10-21 19:22:32,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 245 treesize of output 148 [2021-10-21 19:22:32,238 INFO L354 Elim1Store]: treesize reduction 384, result has 14.7 percent of original size [2021-10-21 19:22:32,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 211 treesize of output 189 [2021-10-21 19:22:38,012 INFO L354 Elim1Store]: treesize reduction 185, result has 11.5 percent of original size [2021-10-21 19:22:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 3831 treesize of output 1707 [2021-10-21 19:22:38,069 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-21 19:22:38,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1686 treesize of output 1690 [2021-10-21 19:22:38,160 INFO L354 Elim1Store]: treesize reduction 316, result has 12.0 percent of original size [2021-10-21 19:22:38,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 1678 treesize of output 1677 [2021-10-21 19:22:38,209 INFO L354 Elim1Store]: treesize reduction 105, result has 7.1 percent of original size [2021-10-21 19:22:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1809 treesize of output 1785 [2021-10-21 19:22:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:38,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225317108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:38,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:38,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-21 19:22:38,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689401341] [2021-10-21 19:22:38,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:22:38,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:22:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:22:38,382 INFO L87 Difference]: Start difference. First operand 373 states and 485 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:22:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:59,682 INFO L93 Difference]: Finished difference Result 639 states and 775 transitions. [2021-10-21 19:22:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-21 19:22:59,682 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 19:22:59,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:59,685 INFO L225 Difference]: With dead ends: 639 [2021-10-21 19:22:59,685 INFO L226 Difference]: Without dead ends: 589 [2021-10-21 19:22:59,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2866.1ms TimeCoverageRelationStatistics Valid=656, Invalid=3376, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 19:22:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-10-21 19:22:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 379. [2021-10-21 19:22:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 376 states have (on average 1.3058510638297873) internal successors, (491), 378 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:22:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 491 transitions. [2021-10-21 19:22:59,754 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 491 transitions. Word has length 37 [2021-10-21 19:22:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:59,755 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 491 transitions. [2021-10-21 19:22:59,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:22:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 491 transitions. [2021-10-21 19:22:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:22:59,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:59,757 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:22:59,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:59,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:59,966 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:22:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:59,966 INFO L82 PathProgramCache]: Analyzing trace with hash 150866976, now seen corresponding path program 1 times [2021-10-21 19:22:59,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:59,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612818627] [2021-10-21 19:22:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:59,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:23:00,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:00,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612818627] [2021-10-21 19:23:00,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612818627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:00,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18972477] [2021-10-21 19:23:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:00,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:00,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:00,105 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:00,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:23:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:23:02,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:23:02,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18972477] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:23:02,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:23:02,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-10-21 19:23:02,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872742126] [2021-10-21 19:23:02,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:23:02,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:23:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:23:02,873 INFO L87 Difference]: Start difference. First operand 379 states and 491 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:03,003 INFO L93 Difference]: Finished difference Result 389 states and 501 transitions. [2021-10-21 19:23:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:23:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 19:23:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:03,005 INFO L225 Difference]: With dead ends: 389 [2021-10-21 19:23:03,005 INFO L226 Difference]: Without dead ends: 378 [2021-10-21 19:23:03,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:23:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-21 19:23:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-10-21 19:23:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 373 states have (on average 1.3029490616621984) internal successors, (486), 375 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 486 transitions. [2021-10-21 19:23:03,076 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 486 transitions. Word has length 37 [2021-10-21 19:23:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:03,077 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 486 transitions. [2021-10-21 19:23:03,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:03,077 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 486 transitions. [2021-10-21 19:23:03,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:23:03,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:03,079 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:03,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:03,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-21 19:23:03,304 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:23:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1856709895, now seen corresponding path program 1 times [2021-10-21 19:23:03,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:03,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515425863] [2021-10-21 19:23:03,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:03,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:03,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:03,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515425863] [2021-10-21 19:23:03,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515425863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:03,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798017486] [2021-10-21 19:23:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:03,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:03,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:03,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:03,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:23:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-21 19:23:06,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:06,157 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 [2021-10-21 19:23:06,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,214 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:23:06,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:23:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,233 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-10-21 19:23:06,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 62 [2021-10-21 19:23:06,246 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:23:06,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:23:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:23:06,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:23:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:06,526 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:23:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 323 treesize of output 178 [2021-10-21 19:23:06,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:06,633 INFO L354 Elim1Store]: treesize reduction 272, result has 15.3 percent of original size [2021-10-21 19:23:06,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 266 treesize of output 154 [2021-10-21 19:23:06,644 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-10-21 19:23:06,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 135 [2021-10-21 19:23:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:06,810 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:23:06,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 185 treesize of output 127 [2021-10-21 19:23:06,813 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 183 treesize of output 171 [2021-10-21 19:23:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:06,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:06,821 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-10-21 19:23:06,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 171 treesize of output 147 [2021-10-21 19:23:07,535 INFO L354 Elim1Store]: treesize reduction 125, result has 8.8 percent of original size [2021-10-21 19:23:07,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 211 treesize of output 120 [2021-10-21 19:23:07,557 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-10-21 19:23:07,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 72 [2021-10-21 19:23:07,561 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 29 treesize of output 17 [2021-10-21 19:23:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:07,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798017486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:07,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:07,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-10-21 19:23:07,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009796] [2021-10-21 19:23:07,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:23:07,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:23:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:23:07,592 INFO L87 Difference]: Start difference. First operand 376 states and 486 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:23,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:23,617 INFO L93 Difference]: Finished difference Result 449 states and 561 transitions. [2021-10-21 19:23:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:23:23,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 19:23:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:23,620 INFO L225 Difference]: With dead ends: 449 [2021-10-21 19:23:23,620 INFO L226 Difference]: Without dead ends: 403 [2021-10-21 19:23:23,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 9261.4ms TimeCoverageRelationStatistics Valid=98, Invalid=551, Unknown=1, NotChecked=0, Total=650 [2021-10-21 19:23:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-21 19:23:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 368. [2021-10-21 19:23:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 365 states have (on average 1.3041095890410959) internal successors, (476), 367 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 476 transitions. [2021-10-21 19:23:23,692 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 476 transitions. Word has length 37 [2021-10-21 19:23:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:23,692 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 476 transitions. [2021-10-21 19:23:23,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 476 transitions. [2021-10-21 19:23:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:23:23,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:23,694 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:23,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:23,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:23:23,908 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:23:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash -446184866, now seen corresponding path program 3 times [2021-10-21 19:23:23,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:23,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914979586] [2021-10-21 19:23:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:23,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-21 19:23:24,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:24,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914979586] [2021-10-21 19:23:24,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914979586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:24,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141199419] [2021-10-21 19:23:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:23:24,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:24,601 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:24,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:23:31,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:23:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:23:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 102 conjunts are in the unsatisfiable core [2021-10-21 19:23:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:31,366 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 [2021-10-21 19:23:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,434 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:23:31,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:23:31,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,464 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:23:31,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 78 [2021-10-21 19:23:31,485 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-10-21 19:23:31,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 82 [2021-10-21 19:23:31,728 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 [2021-10-21 19:23:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:31,749 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:23:31,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 83 [2021-10-21 19:23:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:31,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:31,765 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:23:31,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 77 [2021-10-21 19:23:31,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:32,122 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:23:32,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 397 treesize of output 236 [2021-10-21 19:23:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:32,181 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-10-21 19:23:32,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 220 treesize of output 197 [2021-10-21 19:23:32,257 INFO L354 Elim1Store]: treesize reduction 100, result has 23.1 percent of original size [2021-10-21 19:23:32,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 152 [2021-10-21 19:23:32,291 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-21 19:23:32,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 138 [2021-10-21 19:23:32,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:32,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:32,576 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-21 19:23:32,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 155 treesize of output 151 [2021-10-21 19:23:32,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:32,589 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-21 19:23:32,589 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 1 case distinctions, treesize of input 136 treesize of output 135 [2021-10-21 19:23:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:32,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:32,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:32,600 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:23:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 132 treesize of output 107 [2021-10-21 19:23:32,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:33,104 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:23:33,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 333 treesize of output 282 [2021-10-21 19:23:33,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:33,203 INFO L354 Elim1Store]: treesize reduction 392, result has 13.1 percent of original size [2021-10-21 19:23:33,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 281 treesize of output 264 [2021-10-21 19:23:33,259 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-10-21 19:23:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 249 treesize of output 259 [2021-10-21 19:23:33,305 INFO L354 Elim1Store]: treesize reduction 156, result has 20.8 percent of original size [2021-10-21 19:23:33,306 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 5 case distinctions, treesize of input 240 treesize of output 214 [2021-10-21 19:23:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:33,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:33,680 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-10-21 19:23:33,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 224 treesize of output 180 [2021-10-21 19:23:33,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:33,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:33,695 INFO L354 Elim1Store]: treesize reduction 124, result has 0.8 percent of original size [2021-10-21 19:23:33,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 233 treesize of output 235 [2021-10-21 19:23:33,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:33,715 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-10-21 19:23:33,716 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 3 case distinctions, treesize of input 214 treesize of output 216 [2021-10-21 19:23:34,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:34,407 INFO L354 Elim1Store]: treesize reduction 396, result has 12.6 percent of original size [2021-10-21 19:23:34,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 30 case distinctions, treesize of input 811 treesize of output 332 [2021-10-21 19:23:34,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:34,595 INFO L354 Elim1Store]: treesize reduction 700, result has 11.3 percent of original size [2021-10-21 19:23:34,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 30 case distinctions, treesize of input 378 treesize of output 367 [2021-10-21 19:23:34,605 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-10-21 19:23:34,605 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 3 case distinctions, treesize of input 346 treesize of output 328 [2021-10-21 19:23:34,613 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-10-21 19:23:34,613 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 3 case distinctions, treesize of input 319 treesize of output 313 [2021-10-21 19:23:34,642 INFO L354 Elim1Store]: treesize reduction 188, result has 16.8 percent of original size [2021-10-21 19:23:34,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 304 treesize of output 298 [2021-10-21 19:23:34,688 INFO L354 Elim1Store]: treesize reduction 244, result has 14.4 percent of original size [2021-10-21 19:23:34,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 289 treesize of output 302 [2021-10-21 19:23:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:35,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:35,117 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-10-21 19:23:35,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 309 treesize of output 317 [2021-10-21 19:23:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:35,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:35,139 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-10-21 19:23:35,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 33 case distinctions, treesize of input 290 treesize of output 207 [2021-10-21 19:23:35,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:35,170 INFO L354 Elim1Store]: treesize reduction 152, result has 20.0 percent of original size [2021-10-21 19:23:35,170 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 271 treesize of output 276 [2021-10-21 19:23:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:36,002 INFO L354 Elim1Store]: treesize reduction 880, result has 10.5 percent of original size [2021-10-21 19:23:36,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 47 case distinctions, treesize of input 481 treesize of output 463 [2021-10-21 19:23:36,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:36,229 INFO L354 Elim1Store]: treesize reduction 544, result has 11.5 percent of original size [2021-10-21 19:23:36,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 47 case distinctions, treesize of input 408 treesize of output 299 [2021-10-21 19:23:36,242 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-10-21 19:23:36,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 521 treesize of output 506 [2021-10-21 19:23:36,252 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-10-21 19:23:36,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 494 treesize of output 491 [2021-10-21 19:23:36,278 INFO L354 Elim1Store]: treesize reduction 317, result has 1.2 percent of original size [2021-10-21 19:23:36,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 479 treesize of output 431 [2021-10-21 19:23:36,321 INFO L354 Elim1Store]: treesize reduction 400, result has 14.7 percent of original size [2021-10-21 19:23:36,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 413 treesize of output 410 [2021-10-21 19:23:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:36,801 INFO L354 Elim1Store]: treesize reduction 200, result has 0.5 percent of original size [2021-10-21 19:23:36,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 436 treesize of output 254 [2021-10-21 19:23:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:36,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:23:36,836 INFO L354 Elim1Store]: treesize reduction 740, result has 0.1 percent of original size [2021-10-21 19:23:36,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 614 treesize of output 572 [2021-10-21 19:23:36,886 INFO L354 Elim1Store]: treesize reduction 512, result has 11.9 percent of original size [2021-10-21 19:23:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 539 treesize of output 527 [2021-10-21 19:23:39,190 INFO L354 Elim1Store]: treesize reduction 880, result has 0.1 percent of original size [2021-10-21 19:23:39,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 519 treesize of output 351 [2021-10-21 19:23:39,310 INFO L354 Elim1Store]: treesize reduction 228, result has 18.9 percent of original size [2021-10-21 19:23:39,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 16 new quantified variables, introduced 55 case distinctions, treesize of input 318 treesize of output 145 [2021-10-21 19:23:39,497 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-10-21 19:23:39,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 63 [2021-10-21 19:23:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:39,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141199419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:39,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:39,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 29 [2021-10-21 19:23:39,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472051205] [2021-10-21 19:23:39,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:23:39,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:23:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:23:39,508 INFO L87 Difference]: Start difference. First operand 368 states and 476 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:47,885 INFO L93 Difference]: Finished difference Result 577 states and 741 transitions. [2021-10-21 19:23:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 19:23:47,886 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 19:23:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:47,888 INFO L225 Difference]: With dead ends: 577 [2021-10-21 19:23:47,888 INFO L226 Difference]: Without dead ends: 575 [2021-10-21 19:23:47,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 5299.9ms TimeCoverageRelationStatistics Valid=329, Invalid=2427, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 19:23:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-10-21 19:23:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 344. [2021-10-21 19:23:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 341 states have (on average 1.2932551319648093) internal successors, (441), 343 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 441 transitions. [2021-10-21 19:23:47,976 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 441 transitions. Word has length 37 [2021-10-21 19:23:47,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:47,976 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 441 transitions. [2021-10-21 19:23:47,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:23:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 441 transitions. [2021-10-21 19:23:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:23:47,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:47,978 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:23:48,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:48,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:48,204 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:23:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1904864516, now seen corresponding path program 8 times [2021-10-21 19:23:48,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:48,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763068486] [2021-10-21 19:23:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:48,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:48,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:48,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763068486] [2021-10-21 19:23:48,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763068486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:48,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023623727] [2021-10-21 19:23:48,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:23:48,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:48,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:48,657 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:48,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:23:51,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:23:51,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:23:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-21 19:23:51,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:51,587 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 [2021-10-21 19:23:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:51,668 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:23:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 169 treesize of output 131 [2021-10-21 19:23:51,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:51,693 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:23:51,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 65 [2021-10-21 19:23:51,712 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:23:51,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-10-21 19:23:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:51,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:51,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:23:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:51,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-10-21 19:23:51,979 INFO L354 Elim1Store]: treesize reduction 148, result has 16.4 percent of original size [2021-10-21 19:23:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 329 treesize of output 184 [2021-10-21 19:23:52,024 INFO L354 Elim1Store]: treesize reduction 240, result has 15.8 percent of original size [2021-10-21 19:23:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 253 treesize of output 161 [2021-10-21 19:23:52,048 INFO L354 Elim1Store]: treesize reduction 108, result has 20.0 percent of original size [2021-10-21 19:23:52,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 159 [2021-10-21 19:23:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:52,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:52,285 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-10-21 19:23:52,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 172 treesize of output 122 [2021-10-21 19:23:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:52,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:52,293 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-10-21 19:23:52,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 149 [2021-10-21 19:23:52,522 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-10-21 19:23:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 485 treesize of output 217 [2021-10-21 19:23:52,596 INFO L354 Elim1Store]: treesize reduction 392, result has 13.1 percent of original size [2021-10-21 19:23:52,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 196 treesize of output 179 [2021-10-21 19:23:52,613 INFO L354 Elim1Store]: treesize reduction 69, result has 5.5 percent of original size [2021-10-21 19:23:52,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 152 [2021-10-21 19:23:52,801 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-10-21 19:23:52,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 167 treesize of output 143 [2021-10-21 19:23:52,811 INFO L354 Elim1Store]: treesize reduction 132, result has 0.8 percent of original size [2021-10-21 19:23:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 168 treesize of output 174 [2021-10-21 19:23:54,217 INFO L354 Elim1Store]: treesize reduction 383, result has 6.4 percent of original size [2021-10-21 19:23:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 18 new quantified variables, introduced 45 case distinctions, treesize of input 501 treesize of output 198 [2021-10-21 19:23:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:54,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023623727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:54,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:54,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-21 19:23:54,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810919387] [2021-10-21 19:23:54,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:23:54,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:23:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:23:54,380 INFO L87 Difference]: Start difference. First operand 344 states and 441 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:22,099 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-10-21 19:24:22,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-10-21 19:24:22,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:22,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:24:22,304 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:881) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 35 more [2021-10-21 19:24:22,310 INFO L168 Benchmark]: Toolchain (without parser) took 742050.50 ms. Allocated memory was 96.5 MB in the beginning and 522.2 MB in the end (delta: 425.7 MB). Free memory was 64.3 MB in the beginning and 220.9 MB in the end (delta: -156.6 MB). Peak memory consumption was 269.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:22,310 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:24:22,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.88 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.1 MB in the beginning and 83.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:22,311 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.20 ms. Allocated memory is still 117.4 MB. Free memory was 83.4 MB in the beginning and 81.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:22,311 INFO L168 Benchmark]: Boogie Preprocessor took 39.85 ms. Allocated memory is still 117.4 MB. Free memory was 81.4 MB in the beginning and 79.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:22,311 INFO L168 Benchmark]: RCFGBuilder took 606.01 ms. Allocated memory is still 117.4 MB. Free memory was 79.3 MB in the beginning and 62.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:22,311 INFO L168 Benchmark]: TraceAbstraction took 740812.77 ms. Allocated memory was 117.4 MB in the beginning and 522.2 MB in the end (delta: 404.8 MB). Free memory was 61.5 MB in the beginning and 220.9 MB in the end (delta: -159.4 MB). Peak memory consumption was 249.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:22,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 96.5 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 530.88 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 64.1 MB in the beginning and 83.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.20 ms. Allocated memory is still 117.4 MB. Free memory was 83.4 MB in the beginning and 81.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.85 ms. Allocated memory is still 117.4 MB. Free memory was 81.4 MB in the beginning and 79.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 606.01 ms. Allocated memory is still 117.4 MB. Free memory was 79.3 MB in the beginning and 62.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 740812.77 ms. Allocated memory was 117.4 MB in the beginning and 522.2 MB in the end (delta: 404.8 MB). Free memory was 61.5 MB in the beginning and 220.9 MB in the end (delta: -159.4 MB). Peak memory consumption was 249.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:24:24,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:24:24,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:24:24,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:24:24,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:24:24,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:24:24,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:24:24,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:24:24,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:24:24,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:24:24,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:24:24,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:24:24,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:24:24,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:24:24,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:24:24,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:24:24,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:24:24,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:24:24,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:24:24,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:24:24,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:24:24,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:24:24,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:24:24,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:24:24,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:24:24,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:24:24,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:24:24,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:24:24,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:24:24,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:24:24,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:24:24,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:24:24,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:24:24,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:24:24,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:24:24,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:24:24,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:24:24,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:24:24,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:24:24,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:24:24,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:24:24,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-21 19:24:25,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:24:25,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:24:25,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:24:25,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:24:25,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:24:25,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:24:25,024 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:24:25,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:24:25,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:24:25,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:24:25,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:24:25,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:24:25,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:24:25,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:24:25,028 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-21 19:24:25,028 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-21 19:24:25,028 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:24:25,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:24:25,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:24:25,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:24:25,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:24:25,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:24:25,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:24:25,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:24:25,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:24:25,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:24:25,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:24:25,032 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-21 19:24:25,032 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-21 19:24:25,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:24:25,033 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:24:25,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:24:25,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:24:25,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-21 19:24:25,034 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_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97c87a4be2f33468a224d89594f96c367f5837bb79771cd5155d22e1299d7831 [2021-10-21 19:24:25,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:24:25,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:24:25,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:24:25,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:24:25,432 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:24:25,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/forester-heap/dll-sorted-2.i [2021-10-21 19:24:25,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/1a838c1c6/a51bf44573f9488292e74e3d8e8713f1/FLAGc3f438376 [2021-10-21 19:24:26,143 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:24:26,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i [2021-10-21 19:24:26,158 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/1a838c1c6/a51bf44573f9488292e74e3d8e8713f1/FLAGc3f438376 [2021-10-21 19:24:26,460 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/data/1a838c1c6/a51bf44573f9488292e74e3d8e8713f1 [2021-10-21 19:24:26,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:24:26,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:24:26,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:24:26,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:24:26,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:24:26,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:24:26" (1/1) ... [2021-10-21 19:24:26,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4530f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:26, skipping insertion in model container [2021-10-21 19:24:26,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:24:26" (1/1) ... [2021-10-21 19:24:26,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:24:26,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:24:26,942 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22384,22397] [2021-10-21 19:24:26,949 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22614,22627] [2021-10-21 19:24:26,956 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22989,23002] [2021-10-21 19:24:26,959 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23053,23066] [2021-10-21 19:24:26,961 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23184,23197] [2021-10-21 19:24:26,962 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23248,23261] [2021-10-21 19:24:26,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:24:26,980 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:24:27,015 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22384,22397] [2021-10-21 19:24:27,018 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22614,22627] [2021-10-21 19:24:27,023 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[22989,23002] [2021-10-21 19:24:27,024 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23053,23066] [2021-10-21 19:24:27,026 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23184,23197] [2021-10-21 19:24:27,027 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/sv-benchmarks/c/forester-heap/dll-sorted-2.i[23248,23261] [2021-10-21 19:24:27,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:24:27,063 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:24:27,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27 WrapperNode [2021-10-21 19:24:27,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:24:27,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:24:27,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:24:27,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:24:27,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:24:27,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:24:27,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:24:27,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:24:27,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:24:27,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:24:27,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:24:27,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:24:27,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (1/1) ... [2021-10-21 19:24:27,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:24:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:24:27,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:24:27,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:24:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-21 19:24:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:24:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:24:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:24:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:24:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:24:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-21 19:24:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-21 19:24:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:24:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:24:28,105 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:24:28,106 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-21 19:24:28,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:24:28 BoogieIcfgContainer [2021-10-21 19:24:28,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:24:28,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:24:28,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:24:28,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:24:28,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:24:26" (1/3) ... [2021-10-21 19:24:28,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a94947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:24:28, skipping insertion in model container [2021-10-21 19:24:28,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:24:27" (2/3) ... [2021-10-21 19:24:28,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54a94947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:24:28, skipping insertion in model container [2021-10-21 19:24:28,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:24:28" (3/3) ... [2021-10-21 19:24:28,118 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-sorted-2.i [2021-10-21 19:24:28,124 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:24:28,125 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-21 19:24:28,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:24:28,183 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:24:28,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-21 19:24:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 47 states have (on average 1.872340425531915) internal successors, (88), 53 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) [2021-10-21 19:24:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:24:28,205 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:28,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:24:28,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:24:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:28,212 INFO L82 PathProgramCache]: Analyzing trace with hash 890122502, now seen corresponding path program 1 times [2021-10-21 19:24:28,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:24:28,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089427931] [2021-10-21 19:24:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:28,225 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:24:28,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:24:28,228 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:24:28,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-21 19:24:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:28,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-21 19:24:28,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:28,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:24:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:28,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:24:28,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089427931] [2021-10-21 19:24:28,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089427931] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:24:28,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:24:28,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-21 19:24:28,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429198259] [2021-10-21 19:24:28,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:24:28,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:24:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:24:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:24:28,449 INFO L87 Difference]: Start difference. First operand has 54 states, 47 states have (on average 1.872340425531915) internal successors, (88), 53 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:28,474 INFO L93 Difference]: Finished difference Result 103 states and 167 transitions. [2021-10-21 19:24:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:24:28,475 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:24:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:28,482 INFO L225 Difference]: With dead ends: 103 [2021-10-21 19:24:28,482 INFO L226 Difference]: Without dead ends: 48 [2021-10-21 19:24:28,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:24:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-21 19:24:28,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-21 19:24:28,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 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) [2021-10-21 19:24:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-10-21 19:24:28,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 6 [2021-10-21 19:24:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:28,521 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-10-21 19:24:28,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:28,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-10-21 19:24:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 19:24:28,522 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:28,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:24:28,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:28,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:24:28,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:24:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 889645846, now seen corresponding path program 1 times [2021-10-21 19:24:28,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:24:28,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129677930] [2021-10-21 19:24:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:28,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:24:28,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:24:28,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:24:28,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-21 19:24:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:24:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:24:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:28,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:24:28,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129677930] [2021-10-21 19:24:28,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129677930] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:24:28,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:24:28,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-21 19:24:28,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965246833] [2021-10-21 19:24:28,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:24:28,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:24:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:24:28,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:24:28,874 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:29,028 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-10-21 19:24:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:24:29,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 19:24:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:29,031 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:24:29,031 INFO L226 Difference]: Without dead ends: 52 [2021-10-21 19:24:29,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:24:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-21 19:24:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-10-21 19:24:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 50 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) [2021-10-21 19:24:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-10-21 19:24:29,039 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 6 [2021-10-21 19:24:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:29,042 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-10-21 19:24:29,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-10-21 19:24:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:24:29,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:29,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:24:29,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-21 19:24:29,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:24:29,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:24:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:29,256 INFO L82 PathProgramCache]: Analyzing trace with hash 586319425, now seen corresponding path program 1 times [2021-10-21 19:24:29,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:24:29,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559564723] [2021-10-21 19:24:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:29,272 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:24:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:24:29,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:24:29,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-21 19:24:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:24:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:24:29,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:24:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:24:29,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:24:29,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559564723] [2021-10-21 19:24:29,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559564723] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-21 19:24:29,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:24:29,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-21 19:24:29,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181751363] [2021-10-21 19:24:29,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:24:29,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-21 19:24:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:24:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:24:29,589 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:30,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:30,007 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2021-10-21 19:24:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:24:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-21 19:24:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:30,013 INFO L225 Difference]: With dead ends: 83 [2021-10-21 19:24:30,013 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:24:30,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:24:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:24:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 49. [2021-10-21 19:24:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-10-21 19:24:30,024 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 9 [2021-10-21 19:24:30,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:30,025 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-10-21 19:24:30,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:24:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-10-21 19:24:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:24:30,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:30,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:24:30,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:30,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 [2021-10-21 19:24:30,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-21 19:24:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1875453307, now seen corresponding path program 1 times [2021-10-21 19:24:30,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-21 19:24:30,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208384967] [2021-10-21 19:24:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:30,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-21 19:24:30,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat [2021-10-21 19:24:30,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-21 19:24:30,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-21 19:24:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:30,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:24:30,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:30,501 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 [2021-10-21 19:24:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:24:30,713 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:24:30,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 130 [2021-10-21 19:24:30,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:24:30,780 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:24:30,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 64 [2021-10-21 19:24:30,809 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:24:30,810 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 73 treesize of output 73 [2021-10-21 19:24:31,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:24:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 93 [2021-10-21 19:24:31,111 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:24:31,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 88 [2021-10-21 19:24:31,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2021-10-21 19:24:31,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:24:31,940 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 85 treesize of output 52 [2021-10-21 19:24:31,956 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:24:31,957 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 24 [2021-10-21 19:24:32,007 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 [2021-10-21 19:24:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:32,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:24:32,280 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 99 treesize of output 85 [2021-10-21 19:24:32,571 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 90371 treesize of output 89731 [2021-10-21 19:24:37,601 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 81647 treesize of output 81619 [2021-10-21 19:24:39,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-21 19:24:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208384967] [2021-10-21 19:24:39,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-21 19:24:39,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [336799447] [2021-10-21 19:24:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:39,091 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-21 19:24:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/cvc4 [2021-10-21 19:24:39,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-21 19:24:39,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-21 19:24:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:24:39,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:39,441 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 [2021-10-21 19:24:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:24:39,605 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-21 19:24:39,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 129 [2021-10-21 19:24:39,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:24:39,667 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-10-21 19:24:39,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 72 [2021-10-21 19:24:39,686 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:24:39,687 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 72 treesize of output 72 [2021-10-21 19:24:39,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:24:39,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 93 [2021-10-21 19:24:39,836 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-21 19:24:39,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 88 [2021-10-21 19:24:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2021-10-21 19:24:40,327 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:24:40,328 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 85 treesize of output 52 [2021-10-21 19:24:40,346 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:24:40,346 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 24 [2021-10-21 19:24:40,366 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 [2021-10-21 19:24:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:40,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:24:40,473 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 99 treesize of output 85 [2021-10-21 19:24:40,620 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 4429 treesize of output 4413 [2021-10-21 19:24:40,792 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 11161 treesize of output 11073 [2021-10-21 19:24:41,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-21 19:24:41,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002845044] [2021-10-21 19:24:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:41,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:41,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:24:41,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:24:41,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:24:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:24:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:41,429 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 [2021-10-21 19:24:41,620 INFO L354 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2021-10-21 19:24:41,620 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 2 case distinctions, treesize of input 189 treesize of output 151 [2021-10-21 19:24:41,671 INFO L354 Elim1Store]: treesize reduction 98, result has 16.2 percent of original size [2021-10-21 19:24:41,671 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 2 case distinctions, treesize of input 181 treesize of output 131 [2021-10-21 19:24:41,684 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-21 19:24:41,684 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 131 treesize of output 131 [2021-10-21 19:24:41,915 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-10-21 19:24:41,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 133 treesize of output 93 [2021-10-21 19:24:41,920 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 106 treesize of output 98 [2021-10-21 19:24:41,950 INFO L354 Elim1Store]: treesize reduction 73, result has 8.8 percent of original size [2021-10-21 19:24:41,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 80 [2021-10-21 19:24:42,552 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:24:42,552 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 85 treesize of output 52 [2021-10-21 19:24:42,561 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-10-21 19:24:42,561 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 41 treesize of output 24 [2021-10-21 19:24:42,578 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 [2021-10-21 19:24:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:42,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-21 19:24:42,689 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 99 treesize of output 85 [2021-10-21 19:24:42,837 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 18345 treesize of output 18249 [2021-10-21 19:24:43,599 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 21152 treesize of output 21080 [2021-10-21 19:24:44,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-21 19:24:44,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:24:44,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-21 19:24:44,134 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-21 19:24:44,134 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-21 19:24:44,142 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:24:44,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:24:44,145 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:24:44,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:24:44,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:24:44,146 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:24:44,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:44,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:44,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:24:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:44,770 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:24:44,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:24:44 BoogieIcfgContainer [2021-10-21 19:24:44,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:24:44,794 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:24:44,795 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:24:44,796 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:24:44,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:24:28" (3/4) ... [2021-10-21 19:24:44,800 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 19:24:44,800 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:24:44,801 INFO L168 Benchmark]: Toolchain (without parser) took 18319.83 ms. Allocated memory was 83.9 MB in the beginning and 427.8 MB in the end (delta: 343.9 MB). Free memory was 47.2 MB in the beginning and 225.9 MB in the end (delta: -178.8 MB). Peak memory consumption was 166.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:44,802 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 83.9 MB. Free memory is still 65.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:24:44,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 580.17 ms. Allocated memory is still 83.9 MB. Free memory was 47.0 MB in the beginning and 60.0 MB in the end (delta: -12.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:44,803 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 57.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:44,807 INFO L168 Benchmark]: Boogie Preprocessor took 43.28 ms. Allocated memory is still 83.9 MB. Free memory was 57.4 MB in the beginning and 55.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:44,808 INFO L168 Benchmark]: RCFGBuilder took 935.17 ms. Allocated memory is still 83.9 MB. Free memory was 55.3 MB in the beginning and 63.6 MB in the end (delta: -8.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:44,808 INFO L168 Benchmark]: TraceAbstraction took 16683.15 ms. Allocated memory was 83.9 MB in the beginning and 427.8 MB in the end (delta: 343.9 MB). Free memory was 63.3 MB in the beginning and 225.9 MB in the end (delta: -162.7 MB). Peak memory consumption was 254.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:24:44,809 INFO L168 Benchmark]: Witness Printer took 5.99 ms. Allocated memory is still 427.8 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:24:44,814 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 83.9 MB. Free memory is still 65.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 580.17 ms. Allocated memory is still 83.9 MB. Free memory was 47.0 MB in the beginning and 60.0 MB in the end (delta: -12.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 83.9 MB. Free memory was 59.9 MB in the beginning and 57.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.28 ms. Allocated memory is still 83.9 MB. Free memory was 57.4 MB in the beginning and 55.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 935.17 ms. Allocated memory is still 83.9 MB. Free memory was 55.3 MB in the beginning and 63.6 MB in the end (delta: -8.3 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16683.15 ms. Allocated memory was 83.9 MB in the beginning and 427.8 MB in the end (delta: 343.9 MB). Free memory was 63.3 MB in the beginning and 225.9 MB in the end (delta: -162.7 MB). Peak memory consumption was 254.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.99 ms. Allocated memory is still 427.8 MB. Free memory is still 225.9 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: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] head->data = 0 [L1002] SLL* x = head; [L1003] int marked = 0; [L1006] COND TRUE __VERIFIER_nondet_int() || !marked [L1009] x->next = malloc(sizeof(SLL)) [L1010] EXPR x->next [L1010] x->next->prev = x [L1011] EXPR x->next [L1011] x = x->next [L1012] x->next = ((void*)0) [L1014] COND TRUE __VERIFIER_nondet_int() [L1016] marked = 1 [L1019] COND TRUE \read(marked) [L1020] x->data = 1 [L1006] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1025] x = head [L1027] COND FALSE !(!(((void*)0) != x)) [L1028] marked = 0 [L1030] EXPR x->next [L1030] x->next != ((void*)0) && x->next->data == 0 [L1030] EXPR x->next [L1030] EXPR x->next->data [L1030] x->next != ((void*)0) && x->next->data == 0 [L1030] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1035] EXPR x->next [L1035] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1037] EXPR x->next [L1037] x = x->next [L1038] EXPR x->data [L1038] COND TRUE !(x->data == 1) [L1038] reach_error() - UnprovableResult [Line: 1027]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1069]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1070]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 16593.6ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 11.8ms, AutomataDifference: 648.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 152 SDtfs, 147 SDslu, 48 SDs, 0 SdLazy, 50 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 449.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 38.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 33 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 52.7ms SsaConstructionTime, 93.5ms SatisfiabilityAnalysisTime, 289.4ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 76 SizeOfPredicates, 1 NumberOfNonLiveVariables, 135 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 2/2 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 [2021-10-21 19:24:44,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7256ba31-d499-4a14-9a81-c2bf1e79237e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...