./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68647bf825628f1eeb92b2f9ac6eb17d0be9f68a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68647bf825628f1eeb92b2f9ac6eb17d0be9f68a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:13:59,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:13:59,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:13:59,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:13:59,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:13:59,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:13:59,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:13:59,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:13:59,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:13:59,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:13:59,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:13:59,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:13:59,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:13:59,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:13:59,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:13:59,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:13:59,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:13:59,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:13:59,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:13:59,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:13:59,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:13:59,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:13:59,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:13:59,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:13:59,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:13:59,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:13:59,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:13:59,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:13:59,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:13:59,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:13:59,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:13:59,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:13:59,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:13:59,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:13:59,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:13:59,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:13:59,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:13:59,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:13:59,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:13:59,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:13:59,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:13:59,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:13:59,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:13:59,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:13:59,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:13:59,195 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:13:59,196 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:13:59,196 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:13:59,196 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:13:59,196 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:13:59,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:13:59,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:13:59,198 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:13:59,198 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:13:59,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:13:59,199 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:13:59,199 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:13:59,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:13:59,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:13:59,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:13:59,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:13:59,201 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:13:59,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:13:59,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:13:59,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:13:59,202 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:13:59,202 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:13:59,202 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:13:59,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:13:59,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:13:59,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:13:59,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:13:59,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:13:59,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:13:59,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:13:59,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:13:59,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:13:59,206 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:13:59,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:13:59,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:13:59,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:13:59,207 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68647bf825628f1eeb92b2f9ac6eb17d0be9f68a [2021-10-16 02:13:59,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:13:59,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:13:59,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:13:59,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:13:59,576 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:13:59,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-16 02:13:59,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/cea02c37f/28bb2219a2254973bc7ef7365d2740ab/FLAG8eafd8d99 [2021-10-16 02:14:00,297 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:14:00,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-16 02:14:00,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/cea02c37f/28bb2219a2254973bc7ef7365d2740ab/FLAG8eafd8d99 [2021-10-16 02:14:00,571 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/cea02c37f/28bb2219a2254973bc7ef7365d2740ab [2021-10-16 02:14:00,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:14:00,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:14:00,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:00,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:14:00,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:14:00,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:00" (1/1) ... [2021-10-16 02:14:00,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d8eab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:00, skipping insertion in model container [2021-10-16 02:14:00,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:00" (1/1) ... [2021-10-16 02:14:00,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:14:00,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:14:00,959 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_f0bdc43d-46c5-4f74-819e-de1f339017bb/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-16 02:14:00,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:00,978 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:14:01,051 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_f0bdc43d-46c5-4f74-819e-de1f339017bb/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-16 02:14:01,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:01,092 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:14:01,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01 WrapperNode [2021-10-16 02:14:01,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:01,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:01,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:14:01,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:14:01,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:01,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:14:01,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:14:01,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:14:01,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:14:01,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:14:01,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:14:01,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:14:01,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (1/1) ... [2021-10-16 02:14:01,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:01,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:14:01,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:14:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:14:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:14:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:14:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:14:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:14:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:14:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:14:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:14:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:14:01,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:14:01,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:14:02,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:14:02,170 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-16 02:14:02,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:02 BoogieIcfgContainer [2021-10-16 02:14:02,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:14:02,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:14:02,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:14:02,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:14:02,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:14:00" (1/3) ... [2021-10-16 02:14:02,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697d5c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:02, skipping insertion in model container [2021-10-16 02:14:02,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:01" (2/3) ... [2021-10-16 02:14:02,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697d5c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:02, skipping insertion in model container [2021-10-16 02:14:02,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:02" (3/3) ... [2021-10-16 02:14:02,182 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-10-16 02:14:02,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:14:02,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-10-16 02:14:02,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:14:02,242 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:14:02,242 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-10-16 02:14:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 57 states have (on average 2.473684210526316) internal successors, (141), 129 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:14:02,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:02,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:14:02,270 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash 249158, now seen corresponding path program 1 times [2021-10-16 02:14:02,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:02,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425470516] [2021-10-16 02:14:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:02,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:02,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:02,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425470516] [2021-10-16 02:14:02,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425470516] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:02,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:02,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:14:02,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043151688] [2021-10-16 02:14:02,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:02,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:02,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:02,485 INFO L87 Difference]: Start difference. First operand has 130 states, 57 states have (on average 2.473684210526316) internal successors, (141), 129 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:02,637 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-10-16 02:14:02,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:14:02,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:02,649 INFO L225 Difference]: With dead ends: 138 [2021-10-16 02:14:02,649 INFO L226 Difference]: Without dead ends: 134 [2021-10-16 02:14:02,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-16 02:14:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2021-10-16 02:14:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 116 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2021-10-16 02:14:02,729 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 3 [2021-10-16 02:14:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:02,730 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2021-10-16 02:14:02,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2021-10-16 02:14:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:14:02,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:02,732 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:14:02,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:14:02,733 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 249159, now seen corresponding path program 1 times [2021-10-16 02:14:02,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:02,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923481996] [2021-10-16 02:14:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:02,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:02,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:02,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923481996] [2021-10-16 02:14:02,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923481996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:02,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:02,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:14:02,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586139212] [2021-10-16 02:14:02,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:02,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:02,841 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:02,978 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-16 02:14:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:14:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:02,980 INFO L225 Difference]: With dead ends: 108 [2021-10-16 02:14:02,981 INFO L226 Difference]: Without dead ends: 108 [2021-10-16 02:14:02,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-16 02:14:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-16 02:14:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 54 states have (on average 2.111111111111111) internal successors, (114), 107 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-10-16 02:14:02,994 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 3 [2021-10-16 02:14:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-10-16 02:14:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-10-16 02:14:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:14:02,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:02,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:03,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:14:03,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:03,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1825892368, now seen corresponding path program 1 times [2021-10-16 02:14:03,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:03,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109385899] [2021-10-16 02:14:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:03,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:03,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:03,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109385899] [2021-10-16 02:14:03,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109385899] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:03,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:03,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:14:03,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751494789] [2021-10-16 02:14:03,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:03,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:03,100 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-10-16 02:14:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:03,109 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2021-10-16 02:14:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2021-10-16 02:14:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:03,112 INFO L225 Difference]: With dead ends: 121 [2021-10-16 02:14:03,112 INFO L226 Difference]: Without dead ends: 121 [2021-10-16 02:14:03,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-16 02:14:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2021-10-16 02:14:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 2.090909090909091) internal successors, (115), 108 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-16 02:14:03,119 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 7 [2021-10-16 02:14:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:03,120 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-16 02:14:03,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-10-16 02:14:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-16 02:14:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:14:03,121 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:03,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:03,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:14:03,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -428288242, now seen corresponding path program 1 times [2021-10-16 02:14:03,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:03,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988188312] [2021-10-16 02:14:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:03,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:03,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:03,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988188312] [2021-10-16 02:14:03,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988188312] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:03,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:03,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:14:03,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071189022] [2021-10-16 02:14:03,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:03,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:03,184 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:03,322 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2021-10-16 02:14:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:03,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-10-16 02:14:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:03,324 INFO L225 Difference]: With dead ends: 129 [2021-10-16 02:14:03,324 INFO L226 Difference]: Without dead ends: 129 [2021-10-16 02:14:03,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-16 02:14:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-10-16 02:14:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 107 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-10-16 02:14:03,332 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 11 [2021-10-16 02:14:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-10-16 02:14:03,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-10-16 02:14:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:14:03,333 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:03,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:03,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:14:03,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash -428288241, now seen corresponding path program 1 times [2021-10-16 02:14:03,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:03,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91122158] [2021-10-16 02:14:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:03,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:03,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:03,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91122158] [2021-10-16 02:14:03,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91122158] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:03,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:03,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:14:03,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871109350] [2021-10-16 02:14:03,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:03,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:03,453 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:03,599 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-16 02:14:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 [2021-10-16 02:14:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:03,601 INFO L225 Difference]: With dead ends: 111 [2021-10-16 02:14:03,601 INFO L226 Difference]: Without dead ends: 111 [2021-10-16 02:14:03,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-16 02:14:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-10-16 02:14:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 106 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-16 02:14:03,608 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 11 [2021-10-16 02:14:03,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:03,608 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-16 02:14:03,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-16 02:14:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:14:03,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:03,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:14:03,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:03,610 INFO L82 PathProgramCache]: Analyzing trace with hash 731860655, now seen corresponding path program 1 times [2021-10-16 02:14:03,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:03,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689523440] [2021-10-16 02:14:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:03,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:03,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:03,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689523440] [2021-10-16 02:14:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689523440] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:03,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:14:03,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728932432] [2021-10-16 02:14:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:14:03,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:14:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:03,721 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:03,880 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-10-16 02:14:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-16 02:14:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:03,882 INFO L225 Difference]: With dead ends: 133 [2021-10-16 02:14:03,882 INFO L226 Difference]: Without dead ends: 133 [2021-10-16 02:14:03,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:14:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-16 02:14:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-10-16 02:14:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.967741935483871) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-10-16 02:14:03,888 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 13 [2021-10-16 02:14:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:03,889 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-10-16 02:14:03,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-10-16 02:14:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:14:03,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:03,890 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:03,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:14:03,891 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:03,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash 731860656, now seen corresponding path program 1 times [2021-10-16 02:14:03,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:03,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969682193] [2021-10-16 02:14:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:03,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:03,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:03,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969682193] [2021-10-16 02:14:03,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969682193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:03,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:03,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:14:03,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863774270] [2021-10-16 02:14:03,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:03,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:03,996 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:04,157 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2021-10-16 02:14:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-10-16 02:14:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:04,158 INFO L225 Difference]: With dead ends: 115 [2021-10-16 02:14:04,158 INFO L226 Difference]: Without dead ends: 115 [2021-10-16 02:14:04,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-16 02:14:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-16 02:14:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 113 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2021-10-16 02:14:04,171 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 13 [2021-10-16 02:14:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:04,171 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2021-10-16 02:14:04,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2021-10-16 02:14:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:14:04,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:04,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:04,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:14:04,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1056385667, now seen corresponding path program 1 times [2021-10-16 02:14:04,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:04,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635239026] [2021-10-16 02:14:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:04,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:04,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:04,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635239026] [2021-10-16 02:14:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635239026] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:04,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:14:04,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92427464] [2021-10-16 02:14:04,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:04,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:14:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:04,255 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:04,314 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2021-10-16 02:14:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-10-16 02:14:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:04,315 INFO L225 Difference]: With dead ends: 115 [2021-10-16 02:14:04,316 INFO L226 Difference]: Without dead ends: 115 [2021-10-16 02:14:04,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-16 02:14:04,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-16 02:14:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.935483870967742) internal successors, (120), 113 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:04,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-10-16 02:14:04,320 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 15 [2021-10-16 02:14:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:04,320 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-10-16 02:14:04,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-10-16 02:14:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:14:04,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:04,321 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:04,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:14:04,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1606816062, now seen corresponding path program 1 times [2021-10-16 02:14:04,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:14:04,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6833288] [2021-10-16 02:14:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:04,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:14:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:04,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:14:04,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6833288] [2021-10-16 02:14:04,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6833288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:14:04,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915060357] [2021-10-16 02:14:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:04,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:04,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:14:04,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:14:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:04,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:14:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:04,630 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:14:04,631 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 12 treesize of output 11 [2021-10-16 02:14:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:04,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915060357] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:04,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294999858] [2021-10-16 02:14:04,706 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-16 02:14:04,706 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:14:04,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:14:04,721 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:14:04,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:14:04,774 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,777 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:14:04,777 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-16 02:14:04,782 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:14:04,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:14:04,791 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-10-16 02:14:04,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:14:04,852 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 02:14:04,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:14:04,853 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,857 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:14:04,859 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,860 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:14:04,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:14:04,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:14:04,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:04,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 146 [2021-10-16 02:14:04,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:14:04,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:158, output treesize:146 [2021-10-16 02:14:04,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:05,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:05,126 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_114| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:14:05,130 INFO L168 Benchmark]: Toolchain (without parser) took 4553.59 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 75.7 MB in the beginning and 86.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:05,130 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:14:05,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.46 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 76.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:05,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.62 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 74.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:05,131 INFO L168 Benchmark]: Boogie Preprocessor took 58.43 ms. Allocated memory is still 109.1 MB. Free memory was 74.4 MB in the beginning and 72.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:05,132 INFO L168 Benchmark]: RCFGBuilder took 951.68 ms. Allocated memory is still 109.1 MB. Free memory was 72.3 MB in the beginning and 72.5 MB in the end (delta: -214.4 kB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:05,132 INFO L168 Benchmark]: TraceAbstraction took 2953.96 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 72.0 MB in the beginning and 86.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:14:05,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 41.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 506.46 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 76.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.62 ms. Allocated memory is still 109.1 MB. Free memory was 76.9 MB in the beginning and 74.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.43 ms. Allocated memory is still 109.1 MB. Free memory was 74.4 MB in the beginning and 72.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 951.68 ms. Allocated memory is still 109.1 MB. Free memory was 72.3 MB in the beginning and 72.5 MB in the end (delta: -214.4 kB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2953.96 ms. Allocated memory was 109.1 MB in the beginning and 146.8 MB in the end (delta: 37.7 MB). Free memory was 72.0 MB in the beginning and 86.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_114| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_114|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:14:05,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:14:07,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:14:07,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:14:07,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:14:07,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:14:07,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:14:07,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:14:07,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:14:07,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:14:07,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:14:07,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:14:07,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:14:07,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:14:07,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:14:07,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:14:07,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:14:07,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:14:07,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:14:07,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:14:07,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:14:07,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:14:07,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:14:07,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:14:07,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:14:07,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:14:07,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:14:07,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:14:07,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:14:07,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:14:07,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:14:07,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:14:07,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:14:07,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:14:07,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:14:07,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:14:07,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:14:07,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:14:07,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:14:07,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:14:07,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:14:07,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:14:07,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:14:07,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:14:07,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:14:07,868 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:14:07,868 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:14:07,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:14:07,868 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:14:07,868 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:14:07,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:14:07,869 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:14:07,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:14:07,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:14:07,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:14:07,872 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:14:07,872 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:14:07,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:14:07,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:14:07,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:14:07,873 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:14:07,873 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:14:07,873 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:14:07,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:14:07,874 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:14:07,874 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:14:07,874 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:14:07,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:14:07,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:14:07,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:14:07,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:14:07,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:14:07,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:07,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:14:07,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:14:07,876 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:14:07,877 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:07,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:14:07,877 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:14:07,877 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_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68647bf825628f1eeb92b2f9ac6eb17d0be9f68a [2021-10-16 02:14:08,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:14:08,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:14:08,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:14:08,366 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:14:08,367 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:14:08,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-16 02:14:08,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/de4c9ed9f/0a9c29f4b83742a39924249eb34873f7/FLAGd7c6d7fd7 [2021-10-16 02:14:09,120 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:14:09,122 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2021-10-16 02:14:09,143 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/de4c9ed9f/0a9c29f4b83742a39924249eb34873f7/FLAGd7c6d7fd7 [2021-10-16 02:14:09,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/data/de4c9ed9f/0a9c29f4b83742a39924249eb34873f7 [2021-10-16 02:14:09,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:14:09,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:14:09,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:09,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:14:09,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:14:09,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:09" (1/1) ... [2021-10-16 02:14:09,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c31a2fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:09, skipping insertion in model container [2021-10-16 02:14:09,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:14:09" (1/1) ... [2021-10-16 02:14:09,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:14:09,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:14:09,961 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_f0bdc43d-46c5-4f74-819e-de1f339017bb/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-16 02:14:09,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:09,987 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:14:10,080 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_f0bdc43d-46c5-4f74-819e-de1f339017bb/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i[24640,24653] [2021-10-16 02:14:10,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:14:10,146 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:14:10,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10 WrapperNode [2021-10-16 02:14:10,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:14:10,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:10,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:14:10,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:14:10,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,250 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:14:10,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:14:10,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:14:10,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:14:10,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:14:10,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:14:10,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:14:10,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:14:10,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (1/1) ... [2021-10-16 02:14:10,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:14:10,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:10,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:14:10,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:14:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:14:10,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:14:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:14:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:14:10,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:14:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:14:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:14:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 02:14:10,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:14:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:14:10,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:14:11,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:14:11,677 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-16 02:14:11,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:11 BoogieIcfgContainer [2021-10-16 02:14:11,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:14:11,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:14:11,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:14:11,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:14:11,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:14:09" (1/3) ... [2021-10-16 02:14:11,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff12354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:11, skipping insertion in model container [2021-10-16 02:14:11,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:14:10" (2/3) ... [2021-10-16 02:14:11,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ff12354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:14:11, skipping insertion in model container [2021-10-16 02:14:11,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:11" (3/3) ... [2021-10-16 02:14:11,689 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2021-10-16 02:14:11,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:14:11,695 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-10-16 02:14:11,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:14:11,786 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:14:11,786 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-10-16 02:14:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 146 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:14:11,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:11,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:14:11,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 925702, now seen corresponding path program 1 times [2021-10-16 02:14:11,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:11,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666556278] [2021-10-16 02:14:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:11,865 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:11,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:11,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:14:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:14:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:12,036 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:14:12,037 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-16 02:14:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:12,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:12,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:12,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666556278] [2021-10-16 02:14:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666556278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:12,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:12,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:14:12,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058815925] [2021-10-16 02:14:12,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:14:12,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:14:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:12,125 INFO L87 Difference]: Start difference. First operand has 147 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 146 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:12,548 INFO L93 Difference]: Finished difference Result 156 states and 166 transitions. [2021-10-16 02:14:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-10-16 02:14:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:12,560 INFO L225 Difference]: With dead ends: 156 [2021-10-16 02:14:12,560 INFO L226 Difference]: Without dead ends: 151 [2021-10-16 02:14:12,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:14:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-16 02:14:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 133. [2021-10-16 02:14:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 132 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 139 transitions. [2021-10-16 02:14:12,601 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 139 transitions. Word has length 4 [2021-10-16 02:14:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:12,602 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 139 transitions. [2021-10-16 02:14:12,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 139 transitions. [2021-10-16 02:14:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:14:12,603 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:12,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:14:12,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:12,824 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash 925703, now seen corresponding path program 1 times [2021-10-16 02:14:12,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:12,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272252544] [2021-10-16 02:14:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:12,835 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:12,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:12,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:14:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:14:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:12,936 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:14:12,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-16 02:14:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:12,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:13,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:13,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272252544] [2021-10-16 02:14:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272252544] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:13,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:13,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:14:13,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127479235] [2021-10-16 02:14:13,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:13,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:13,057 INFO L87 Difference]: Start difference. First operand 133 states and 139 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-10-16 02:14:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:13,451 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2021-10-16 02:14:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:14:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 4 [2021-10-16 02:14:13,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:13,454 INFO L225 Difference]: With dead ends: 124 [2021-10-16 02:14:13,454 INFO L226 Difference]: Without dead ends: 124 [2021-10-16 02:14:13,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-16 02:14:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-10-16 02:14:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 70 states have (on average 1.8571428571428572) internal successors, (130), 123 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2021-10-16 02:14:13,471 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 4 [2021-10-16 02:14:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:13,471 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2021-10-16 02:14:13,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-10-16 02:14:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2021-10-16 02:14:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:14:13,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:13,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:13,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:13,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:13,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:13,688 INFO L82 PathProgramCache]: Analyzing trace with hash 613332465, now seen corresponding path program 1 times [2021-10-16 02:14:13,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:13,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077263865] [2021-10-16 02:14:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:13,690 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:13,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:13,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:13,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:14:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:13,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:13,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:13,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:13,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077263865] [2021-10-16 02:14:13,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077263865] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:13,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:13,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:14:13,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458111553] [2021-10-16 02:14:13,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:13,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:13,901 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:13,923 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2021-10-16 02:14:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:14:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:14:13,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:13,925 INFO L225 Difference]: With dead ends: 139 [2021-10-16 02:14:13,925 INFO L226 Difference]: Without dead ends: 139 [2021-10-16 02:14:13,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-16 02:14:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2021-10-16 02:14:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 124 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2021-10-16 02:14:13,935 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 10 [2021-10-16 02:14:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:13,935 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2021-10-16 02:14:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2021-10-16 02:14:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:14:13,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:13,937 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:13,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:14,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:14,153 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1103137848, now seen corresponding path program 1 times [2021-10-16 02:14:14,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:14,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147405658] [2021-10-16 02:14:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:14,155 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:14,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:14,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:14,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:14:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:14,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:14,327 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 [2021-10-16 02:14:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:14,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:14,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:14,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147405658] [2021-10-16 02:14:14,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147405658] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:14,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:14,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:14:14,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143933927] [2021-10-16 02:14:14,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:14:14,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:14:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:14,465 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:15,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:15,021 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2021-10-16 02:14:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:14:15,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:14:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:15,023 INFO L225 Difference]: With dead ends: 148 [2021-10-16 02:14:15,023 INFO L226 Difference]: Without dead ends: 148 [2021-10-16 02:14:15,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:14:15,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-16 02:14:15,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-10-16 02:14:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 71 states have (on average 1.8309859154929577) internal successors, (130), 123 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2021-10-16 02:14:15,032 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 16 [2021-10-16 02:14:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:15,032 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2021-10-16 02:14:15,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2021-10-16 02:14:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:14:15,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:15,033 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:15,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:15,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:15,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1103137849, now seen corresponding path program 1 times [2021-10-16 02:14:15,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:15,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572376003] [2021-10-16 02:14:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:15,235 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:15,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:15,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:15,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:14:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:14:15,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:15,382 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 [2021-10-16 02:14:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:15,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:15,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:15,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572376003] [2021-10-16 02:14:15,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572376003] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:15,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:15,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:14:15,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020487090] [2021-10-16 02:14:15,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:14:15,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:14:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:14:15,795 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:16,485 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2021-10-16 02:14:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:14:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:14:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:16,487 INFO L225 Difference]: With dead ends: 129 [2021-10-16 02:14:16,487 INFO L226 Difference]: Without dead ends: 129 [2021-10-16 02:14:16,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:14:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-16 02:14:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2021-10-16 02:14:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 71 states have (on average 1.8169014084507042) internal successors, (129), 122 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2021-10-16 02:14:16,494 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 16 [2021-10-16 02:14:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:16,495 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2021-10-16 02:14:16,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2021-10-16 02:14:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:14:16,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:16,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:16,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:16,696 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash -741449383, now seen corresponding path program 1 times [2021-10-16 02:14:16,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:16,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105552022] [2021-10-16 02:14:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:16,698 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:16,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:16,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:16,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:14:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:14:16,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:16,864 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:14:16,864 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-16 02:14:16,983 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:14:16,984 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 25 treesize of output 32 [2021-10-16 02:14:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:17,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:25,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:25,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105552022] [2021-10-16 02:14:25,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105552022] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:25,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:25,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:14:25,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235041709] [2021-10-16 02:14:25,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-16 02:14:25,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:25,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-16 02:14:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=49, Unknown=3, NotChecked=0, Total=72 [2021-10-16 02:14:25,560 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:26,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:26,339 INFO L93 Difference]: Finished difference Result 153 states and 161 transitions. [2021-10-16 02:14:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:14:26,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:14:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:26,343 INFO L225 Difference]: With dead ends: 153 [2021-10-16 02:14:26,343 INFO L226 Difference]: Without dead ends: 153 [2021-10-16 02:14:26,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8229.0ms TimeCoverageRelationStatistics Valid=54, Invalid=99, Unknown=3, NotChecked=0, Total=156 [2021-10-16 02:14:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-16 02:14:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2021-10-16 02:14:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 80 states have (on average 1.75) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2021-10-16 02:14:26,350 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 18 [2021-10-16 02:14:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:26,350 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2021-10-16 02:14:26,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2021-10-16 02:14:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:14:26,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:26,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:26,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:26,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:26,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash -741449382, now seen corresponding path program 1 times [2021-10-16 02:14:26,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:26,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692493079] [2021-10-16 02:14:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:26,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:26,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:26,576 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:26,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:14:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:26,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:14:26,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:26,823 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-16 02:14:26,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-10-16 02:14:26,840 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:14:26,841 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 1 case distinctions, treesize of input 24 treesize of output 28 [2021-10-16 02:14:27,024 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:14:27,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-10-16 02:14:27,049 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:14:27,050 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 28 treesize of output 28 [2021-10-16 02:14:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:27,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:30,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:30,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692493079] [2021-10-16 02:14:30,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692493079] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:30,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:30,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:14:30,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878441243] [2021-10-16 02:14:30,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:14:30,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:14:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-10-16 02:14:30,430 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:53,229 INFO L93 Difference]: Finished difference Result 172 states and 180 transitions. [2021-10-16 02:14:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-16 02:14:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-16 02:14:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:53,233 INFO L225 Difference]: With dead ends: 172 [2021-10-16 02:14:53,233 INFO L226 Difference]: Without dead ends: 172 [2021-10-16 02:14:53,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 11777.0ms TimeCoverageRelationStatistics Valid=89, Invalid=182, Unknown=1, NotChecked=0, Total=272 [2021-10-16 02:14:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-16 02:14:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 132. [2021-10-16 02:14:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 80 states have (on average 1.7375) internal successors, (139), 131 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:53,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2021-10-16 02:14:53,239 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 18 [2021-10-16 02:14:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:53,239 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2021-10-16 02:14:53,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2021-10-16 02:14:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:14:53,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:53,240 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:53,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:53,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:53,441 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash 431868768, now seen corresponding path program 1 times [2021-10-16 02:14:53,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:53,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901555466] [2021-10-16 02:14:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:53,442 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:53,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:53,443 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:53,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:14:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:14:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:53,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:53,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:53,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901555466] [2021-10-16 02:14:53,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901555466] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:14:53,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:14:53,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-16 02:14:53,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422858290] [2021-10-16 02:14:53,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:14:53,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:53,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:14:53,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:53,838 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:54,239 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2021-10-16 02:14:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:14:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-16 02:14:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:54,240 INFO L225 Difference]: With dead ends: 133 [2021-10-16 02:14:54,241 INFO L226 Difference]: Without dead ends: 133 [2021-10-16 02:14:54,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:14:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-16 02:14:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-10-16 02:14:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 80 states have (on average 1.725) internal successors, (138), 131 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2021-10-16 02:14:54,246 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 20 [2021-10-16 02:14:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:54,247 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2021-10-16 02:14:54,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2021-10-16 02:14:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:14:54,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:54,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:54,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:54,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:54,461 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash 498265101, now seen corresponding path program 1 times [2021-10-16 02:14:54,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:54,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123855603] [2021-10-16 02:14:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:54,462 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:54,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:54,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:54,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:14:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:54,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:14:54,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:54,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:54,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:14:54,804 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 21 treesize of output 20 [2021-10-16 02:14:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:54,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:54,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123855603] [2021-10-16 02:14:54,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123855603] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:54,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [528786318] [2021-10-16 02:14:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:54,875 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:54,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:14:54,876 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:14:54,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:14:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-16 02:14:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-10-16 02:14:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:55,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:55,296 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:14:55,296 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 21 treesize of output 20 [2021-10-16 02:14:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:55,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [528786318] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:55,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713197473] [2021-10-16 02:14:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:55,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:55,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:55,379 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:14:55,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:14:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:14:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:55,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:55,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:55,708 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-16 02:14:55,708 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 21 treesize of output 20 [2021-10-16 02:14:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:55,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713197473] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:55,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:14:55,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-10-16 02:14:55,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591451919] [2021-10-16 02:14:55,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:14:55,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:14:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:14:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:14:55,767 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:14:56,295 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2021-10-16 02:14:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:14:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2021-10-16 02:14:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:14:56,296 INFO L225 Difference]: With dead ends: 150 [2021-10-16 02:14:56,296 INFO L226 Difference]: Without dead ends: 150 [2021-10-16 02:14:56,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:14:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-16 02:14:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2021-10-16 02:14:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.7125) internal successors, (137), 130 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2021-10-16 02:14:56,300 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 21 [2021-10-16 02:14:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:14:56,301 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2021-10-16 02:14:56,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:14:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2021-10-16 02:14:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:14:56,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:14:56,302 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:14:56,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:14:56,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-16 02:14:56,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-16 02:14:56,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:14:56,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:14:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:14:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash 498265102, now seen corresponding path program 1 times [2021-10-16 02:14:56,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:14:56,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801107193] [2021-10-16 02:14:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:56,907 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:14:56,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:14:56,908 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:14:56,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:14:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:14:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:57,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:57,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:57,598 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 22 treesize of output 26 [2021-10-16 02:14:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:58,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:14:58,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801107193] [2021-10-16 02:14:58,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801107193] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:58,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701480440] [2021-10-16 02:14:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:58,266 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:14:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:14:58,267 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:14:58,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-16 02:14:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:14:58,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:58,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:58,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:58,906 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 22 treesize of output 26 [2021-10-16 02:14:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:59,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701480440] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:14:59,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333045967] [2021-10-16 02:14:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:14:59,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:14:59,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:14:59,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:14:59,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-16 02:14:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:14:59,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:14:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:14:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:14:59,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:14:59,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:14:59,992 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 22 treesize of output 26 [2021-10-16 02:15:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:00,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333045967] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:15:00,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:15:00,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-16 02:15:00,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15165761] [2021-10-16 02:15:00,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:15:00,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:00,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:15:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:15:00,387 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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) [2021-10-16 02:15:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:01,562 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2021-10-16 02:15:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:15:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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 21 [2021-10-16 02:15:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:01,564 INFO L225 Difference]: With dead ends: 131 [2021-10-16 02:15:01,564 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 02:15:01,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:15:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 02:15:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-10-16 02:15:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 80 states have (on average 1.7) internal successors, (136), 129 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) [2021-10-16 02:15:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2021-10-16 02:15:01,568 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 21 [2021-10-16 02:15:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:01,569 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2021-10-16 02:15:01,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 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) [2021-10-16 02:15:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2021-10-16 02:15:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:15:01,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:01,570 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:01,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:01,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:01,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-16 02:15:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:15:02,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1733651014, now seen corresponding path program 1 times [2021-10-16 02:15:02,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:02,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401830229] [2021-10-16 02:15:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:02,176 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:02,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:02,177 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:02,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 02:15:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:15:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:02,485 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 [2021-10-16 02:15:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:02,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:02,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:02,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401830229] [2021-10-16 02:15:02,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401830229] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:15:02,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:15:02,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-16 02:15:02,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571867612] [2021-10-16 02:15:02,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:15:02,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:15:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:15:02,709 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:03,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:03,347 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2021-10-16 02:15:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:15:03,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:15:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:03,348 INFO L225 Difference]: With dead ends: 146 [2021-10-16 02:15:03,349 INFO L226 Difference]: Without dead ends: 146 [2021-10-16 02:15:03,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:15:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-16 02:15:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2021-10-16 02:15:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 80 states have (on average 1.675) internal successors, (134), 127 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:03,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2021-10-16 02:15:03,353 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 22 [2021-10-16 02:15:03,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:03,353 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2021-10-16 02:15:03,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2021-10-16 02:15:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:15:03,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:03,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:03,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:03,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1733651013, now seen corresponding path program 1 times [2021-10-16 02:15:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:03,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252890725] [2021-10-16 02:15:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:03,556 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:03,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:03,557 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:03,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:15:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:15:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:03,954 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 [2021-10-16 02:15:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:04,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:04,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:04,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252890725] [2021-10-16 02:15:04,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252890725] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:15:04,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:15:04,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-16 02:15:04,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289524444] [2021-10-16 02:15:04,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:15:04,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:15:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:15:04,629 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-10-16 02:15:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:05,489 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-10-16 02:15:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:15:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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 22 [2021-10-16 02:15:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:05,491 INFO L225 Difference]: With dead ends: 126 [2021-10-16 02:15:05,491 INFO L226 Difference]: Without dead ends: 126 [2021-10-16 02:15:05,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:15:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-16 02:15:05,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-10-16 02:15:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.6582278481012658) internal successors, (131), 124 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2021-10-16 02:15:05,495 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 22 [2021-10-16 02:15:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:05,495 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2021-10-16 02:15:05,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 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) [2021-10-16 02:15:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2021-10-16 02:15:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 02:15:05,497 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:05,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:05,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:05,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:05,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:05,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1584590306, now seen corresponding path program 1 times [2021-10-16 02:15:05,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:05,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713117232] [2021-10-16 02:15:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:05,708 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:05,709 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:05,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 02:15:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:15:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:06,183 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:15:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-16 02:15:06,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-10-16 02:15:06,436 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 02:15:06,436 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 3 case distinctions, treesize of input 23 treesize of output 28 [2021-10-16 02:15:07,391 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-16 02:15:07,392 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 3 case distinctions, treesize of input 23 treesize of output 32 [2021-10-16 02:15:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:07,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:08,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:08,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:08,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713117232] [2021-10-16 02:15:08,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713117232] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:15:08,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:15:08,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-16 02:15:08,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449918032] [2021-10-16 02:15:08,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:15:08,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:08,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:15:08,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:15:08,974 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:10,834 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2021-10-16 02:15:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:15:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-16 02:15:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:10,836 INFO L225 Difference]: With dead ends: 117 [2021-10-16 02:15:10,836 INFO L226 Difference]: Without dead ends: 117 [2021-10-16 02:15:10,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:15:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-16 02:15:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-10-16 02:15:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 116 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2021-10-16 02:15:10,839 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 31 [2021-10-16 02:15:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:10,839 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2021-10-16 02:15:10,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2021-10-16 02:15:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 02:15:10,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:10,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:10,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-16 02:15:11,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:11,050 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1584590307, now seen corresponding path program 1 times [2021-10-16 02:15:11,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:11,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564749933] [2021-10-16 02:15:11,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:11,052 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:11,053 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:11,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 02:15:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:15:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:11,571 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:15:11,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-10-16 02:15:11,803 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:15:11,804 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 3 case distinctions, treesize of input 35 treesize of output 46 [2021-10-16 02:15:12,725 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:15:12,725 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 3 case distinctions, treesize of input 39 treesize of output 50 [2021-10-16 02:15:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:13,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:13,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:13,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564749933] [2021-10-16 02:15:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564749933] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:15:13,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:15:13,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-16 02:15:13,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386938735] [2021-10-16 02:15:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:15:13,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:15:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:15:13,673 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:14,457 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2021-10-16 02:15:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:15:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-16 02:15:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:14,458 INFO L225 Difference]: With dead ends: 127 [2021-10-16 02:15:14,458 INFO L226 Difference]: Without dead ends: 127 [2021-10-16 02:15:14,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:15:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-16 02:15:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-10-16 02:15:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 108 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-16 02:15:14,462 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 31 [2021-10-16 02:15:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:14,463 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-16 02:15:14,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-16 02:15:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:15:14,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:14,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:14,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:14,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:14,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash -544216949, now seen corresponding path program 1 times [2021-10-16 02:15:14,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:14,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688156016] [2021-10-16 02:15:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:14,684 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:14,685 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:14,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 02:15:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:15:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:15,169 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 [2021-10-16 02:15:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:15:15,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:15:15,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:15,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688156016] [2021-10-16 02:15:15,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688156016] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:15:15,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:15:15,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 02:15:15,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090286467] [2021-10-16 02:15:15,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:15:15,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:15:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:15:15,317 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:15,794 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2021-10-16 02:15:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:15:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-16 02:15:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:15,795 INFO L225 Difference]: With dead ends: 123 [2021-10-16 02:15:15,795 INFO L226 Difference]: Without dead ends: 123 [2021-10-16 02:15:15,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:15:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-16 02:15:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2021-10-16 02:15:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 104 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2021-10-16 02:15:15,799 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 34 [2021-10-16 02:15:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2021-10-16 02:15:15,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2021-10-16 02:15:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:15:15,800 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:15,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:15,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:16,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:16,011 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash -544216948, now seen corresponding path program 1 times [2021-10-16 02:15:16,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:16,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542445525] [2021-10-16 02:15:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:16,012 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:16,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:16,014 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:16,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 02:15:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:16,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:15:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:16,545 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 [2021-10-16 02:15:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:15:16,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:15:17,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:17,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542445525] [2021-10-16 02:15:17,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542445525] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:15:17,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:15:17,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:15:17,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462800250] [2021-10-16 02:15:17,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:15:17,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:15:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:15:17,043 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 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) [2021-10-16 02:15:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:17,750 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2021-10-16 02:15:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:15:17,751 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 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 34 [2021-10-16 02:15:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:17,752 INFO L225 Difference]: With dead ends: 101 [2021-10-16 02:15:17,752 INFO L226 Difference]: Without dead ends: 101 [2021-10-16 02:15:17,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:15:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-16 02:15:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-16 02:15:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 100 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-10-16 02:15:17,756 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 34 [2021-10-16 02:15:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-10-16 02:15:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 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) [2021-10-16 02:15:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-10-16 02:15:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:15:17,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:17,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:17,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:17,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:17,962 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash -544206026, now seen corresponding path program 1 times [2021-10-16 02:15:17,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:17,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837020120] [2021-10-16 02:15:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:17,963 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:17,964 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:17,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 02:15:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:15:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:18,559 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 [2021-10-16 02:15:18,866 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-16 02:15:18,867 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 31 treesize of output 42 [2021-10-16 02:15:19,055 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-16 02:15:19,056 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 45 treesize of output 48 [2021-10-16 02:15:19,438 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-10-16 02:15:19,438 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 61 treesize of output 73 [2021-10-16 02:15:20,078 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-16 02:15:20,078 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 99 treesize of output 89 [2021-10-16 02:15:21,141 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:15:21,141 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 73 treesize of output 51 [2021-10-16 02:15:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:21,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:15:21,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:15:21,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-16 02:15:35,728 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 567 treesize of output 555 [2021-10-16 02:15:42,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:15:42,857 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 90 treesize of output 108 [2021-10-16 02:15:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:15:43,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:15:43,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837020120] [2021-10-16 02:15:43,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837020120] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 02:15:43,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:15:43,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2021-10-16 02:15:43,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575490717] [2021-10-16 02:15:43,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 02:15:43,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:15:43,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 02:15:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=468, Unknown=4, NotChecked=0, Total=552 [2021-10-16 02:15:43,062 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:15:54,917 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2021-10-16 02:15:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 02:15:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-16 02:15:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:15:54,919 INFO L225 Difference]: With dead ends: 118 [2021-10-16 02:15:54,919 INFO L226 Difference]: Without dead ends: 118 [2021-10-16 02:15:54,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 18270.9ms TimeCoverageRelationStatistics Valid=283, Invalid=903, Unknown=4, NotChecked=0, Total=1190 [2021-10-16 02:15:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-16 02:15:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-10-16 02:15:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 99 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2021-10-16 02:15:54,923 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 34 [2021-10-16 02:15:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:15:54,923 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2021-10-16 02:15:54,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:15:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2021-10-16 02:15:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-16 02:15:54,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:15:54,925 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:15:54,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 02:15:55,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:15:55,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-16 02:15:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:15:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash -544206025, now seen corresponding path program 1 times [2021-10-16 02:15:55,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:15:55,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955814116] [2021-10-16 02:15:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:15:55,140 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:15:55,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:15:55,141 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:15:55,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-16 02:15:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:15:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-16 02:15:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:15:55,948 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 [2021-10-16 02:15:55,964 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 [2021-10-16 02:15:56,510 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 02:15:56,510 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 25 treesize of output 25 [2021-10-16 02:15:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-16 02:15:56,693 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:15:56,693 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 19 treesize of output 18 [2021-10-16 02:15:56,779 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-16 02:15:56,779 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 29 treesize of output 32 [2021-10-16 02:15:57,073 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-10-16 02:15:57,073 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 45 treesize of output 57 [2021-10-16 02:15:57,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:15:57,232 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-16 02:15:57,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:15:57,487 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-16 02:15:57,488 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 122 treesize of output 112 [2021-10-16 02:15:57,591 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-16 02:15:57,591 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 103 treesize of output 93 [2021-10-16 02:16:00,762 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:16:00,762 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 82 treesize of output 60 [2021-10-16 02:16:00,776 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:16:00,776 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 51 treesize of output 33 [2021-10-16 02:16:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:16:00,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:16:01,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:16:01,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-16 02:16:01,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:16:01,181 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-16 02:16:24,915 WARN L207 SmtUtils]: Spent 6.34 s on a formula simplification that was a NOOP. DAG size: 36 [2021-10-16 02:16:24,982 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 490 treesize of output 482 [2021-10-16 02:16:24,991 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 2150 treesize of output 2106 [2021-10-16 02:16:25,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:16:25,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955814116] [2021-10-16 02:16:25,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:16:25,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15302212] [2021-10-16 02:16:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:16:25,028 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:16:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:16:25,034 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:16:25,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-16 02:16:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:16:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-16 02:16:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:16:26,067 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 [2021-10-16 02:16:26,078 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 [2021-10-16 02:16:26,966 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-16 02:16:26,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-16 02:16:27,003 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 02:16:27,003 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 22 treesize of output 22 [2021-10-16 02:16:27,224 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-16 02:16:27,224 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 29 treesize of output 32 [2021-10-16 02:16:27,298 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-16 02:16:27,298 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 19 treesize of output 18 [2021-10-16 02:16:27,653 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-10-16 02:16:27,654 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 45 treesize of output 57 [2021-10-16 02:16:27,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:16:27,806 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-16 02:16:27,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:16:28,355 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-16 02:16:28,356 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 122 treesize of output 112 [2021-10-16 02:16:28,469 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-16 02:16:28,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 93 [2021-10-16 02:16:33,550 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:16:33,551 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 82 treesize of output 64 [2021-10-16 02:16:33,577 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-16 02:16:33,577 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 55 treesize of output 33 [2021-10-16 02:16:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:16:33,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:16:33,712 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:16:33,713 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-16 02:16:33,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:16:33,719 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-16 02:16:34,558 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 897 treesize of output 885 [2021-10-16 02:16:34,571 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 7773 treesize of output 7633 [2021-10-16 02:16:34,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:16:34,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636682908] [2021-10-16 02:16:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:16:34,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:16:34,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:16:34,695 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:16:34,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-16 02:16:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:16:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 02:16:35,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:16:35,481 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 [2021-10-16 02:16:36,517 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 02:16:36,517 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 22 treesize of output 22 [2021-10-16 02:16:36,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-16 02:16:36,766 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-16 02:16:36,766 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 29 treesize of output 28 [2021-10-16 02:16:36,831 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-16 02:16:36,831 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 19 treesize of output 18 [2021-10-16 02:16:37,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:16:37,009 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:16:37,009 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 41 treesize of output 43 [2021-10-16 02:16:37,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:16:37,064 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:16:37,064 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 28 treesize of output 30 [2021-10-16 02:16:37,278 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:16:37,279 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 91 treesize of output 85 [2021-10-16 02:16:37,286 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:16:37,287 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 76 treesize of output 70 [2021-10-16 02:16:39,073 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:16:39,073 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 80 treesize of output 60 [2021-10-16 02:16:39,079 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:16:39,080 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 51 treesize of output 35 [2021-10-16 02:16:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:16:39,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:16:40,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:16:40,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-16 02:16:40,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:16:40,126 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-10-16 02:17:05,150 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 1101 treesize of output 1081 [2021-10-16 02:17:05,171 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 4056 treesize of output 3976 [2021-10-16 02:17:05,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:17:05,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:17:05,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:17:05,233 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:17:05,234 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:17:05,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-16 02:17:05,241 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 02:17:05,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 02:17:05,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 02:17:05,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 02:17:05,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 02:17:05,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-16 02:17:05,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-16 02:17:05,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-16 02:17:05,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-16 02:17:05,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-10-16 02:17:05,246 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54REQUIRES_VIOLATION [2021-10-16 02:17:05,247 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63REQUIRES_VIOLATION [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:17:05,248 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:17:05,249 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:17:05,249 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:17:05,249 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr68ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:17:05,249 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:17:05,249 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr70ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:17:05,249 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:17:05,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:05,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:05,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-16 02:17:05,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:17:05,855 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:17:05,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:17:05 BoogieIcfgContainer [2021-10-16 02:17:05,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:17:05,884 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:17:05,884 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:17:05,884 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:17:05,885 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:14:11" (3/4) ... [2021-10-16 02:17:05,888 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:17:05,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:17:05,889 INFO L168 Benchmark]: Toolchain (without parser) took 176524.19 ms. Allocated memory was 58.7 MB in the beginning and 163.6 MB in the end (delta: 104.9 MB). Free memory was 35.6 MB in the beginning and 88.0 MB in the end (delta: -52.3 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:05,889 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:17:05,890 INFO L168 Benchmark]: CACSL2BoogieTranslator took 782.05 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 35.4 MB in the beginning and 52.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:05,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 100.28 ms. Allocated memory is still 77.6 MB. Free memory was 52.1 MB in the beginning and 49.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:05,890 INFO L168 Benchmark]: Boogie Preprocessor took 46.19 ms. Allocated memory is still 77.6 MB. Free memory was 49.9 MB in the beginning and 47.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:05,891 INFO L168 Benchmark]: RCFGBuilder took 1382.51 ms. Allocated memory is still 77.6 MB. Free memory was 47.5 MB in the beginning and 40.2 MB in the end (delta: 7.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:05,891 INFO L168 Benchmark]: TraceAbstraction took 174201.46 ms. Allocated memory was 77.6 MB in the beginning and 163.6 MB in the end (delta: 86.0 MB). Free memory was 39.6 MB in the beginning and 89.0 MB in the end (delta: -49.4 MB). Peak memory consumption was 96.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:17:05,892 INFO L168 Benchmark]: Witness Printer took 4.17 ms. Allocated memory is still 163.6 MB. Free memory is still 88.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:17:05,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 58.7 MB. Free memory is still 40.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 782.05 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 35.4 MB in the beginning and 52.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 100.28 ms. Allocated memory is still 77.6 MB. Free memory was 52.1 MB in the beginning and 49.9 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.19 ms. Allocated memory is still 77.6 MB. Free memory was 49.9 MB in the beginning and 47.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1382.51 ms. Allocated memory is still 77.6 MB. Free memory was 47.5 MB in the beginning and 40.2 MB in the end (delta: 7.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 174201.46 ms. Allocated memory was 77.6 MB in the beginning and 163.6 MB in the end (delta: 86.0 MB). Free memory was 39.6 MB in the beginning and 89.0 MB in the end (delta: -49.4 MB). Peak memory consumption was 96.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.17 ms. Allocated memory is still 163.6 MB. Free memory is still 88.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms 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: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L629] const int len = 2; [L630] const int data = 1; [L631] DLL s = dll_circular_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L586] DLL head = node_create(data); [L587] DLL last = head; [L588] COND TRUE len > 1 [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L589] DLL new_head = node_create(data); [L590] new_head->next = head [L591] COND TRUE \read(head) [L592] head->prev = new_head [L594] head = new_head [L595] len-- [L588] COND FALSE !(len > 1) [L597] last->next = head [L598] head->prev = last [L599] return head; [L631] DLL s = dll_circular_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L613] DLL new_head = node_create(data); [L614] EXPR \read(*head) [L614] COND FALSE !(((void *)0) == *head) [L619] EXPR \read(*head) [L619] (*head)->prev - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 624]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 625]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 625]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 633]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 633]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 641]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 641]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 645]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 645]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 647]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 628]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 147 locations, 72 error locations. Started 1 CEGAR loops. OverallTime: 174078.0ms, OverallIterations: 18, TraceHistogramMax: 1, EmptinessCheckTime: 47.7ms, AutomataDifference: 45041.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1061 SDtfs, 5777 SDslu, 1038 SDs, 0 SdLazy, 2573 SolverSat, 218 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 30135.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 899 GetRequests, 743 SyntacticMatches, 5 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 40673.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=0, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 110.8ms AutomataMinimizationTime, 17 MinimizatonAttempts, 217 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 249.1ms SsaConstructionTime, 1695.4ms SatisfiabilityAnalysisTime, 48141.0ms InterpolantComputationTime, 440 NumberOfCodeBlocks, 440 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 838 ConstructedInterpolants, 163 QuantifiedInterpolants, 9614 SizeOfPredicates, 106 NumberOfNonLiveVariables, 2586 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 42 InterpolantComputations, 27 PerfectInterpolantSequences, 13/28 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 [2021-10-16 02:17:05,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0bdc43d-46c5-4f74-819e-de1f339017bb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...