./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.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_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/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_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/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_97d55147-b50d-4d62-ba6a-94265c843653/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 385f60e373a6ce558a1e3490d71d989088c508fd .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/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_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/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_97d55147-b50d-4d62-ba6a-94265c843653/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 385f60e373a6ce558a1e3490d71d989088c508fd ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:18:01,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:18:01,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:18:01,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:18:01,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:18:01,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:18:01,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:18:01,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:18:01,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:18:01,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:18:01,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:18:01,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:18:01,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:18:01,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:18:01,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:18:01,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:18:01,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:18:01,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:18:01,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:18:01,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:18:01,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:18:01,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:18:01,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:18:01,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:18:01,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:18:01,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:18:01,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:18:01,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:18:01,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:18:01,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:18:01,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:18:01,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:18:01,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:18:01,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:18:01,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:18:01,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:18:01,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:18:01,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:18:01,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:18:01,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:18:01,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:18:01,171 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 02:18:01,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:18:01,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:18:01,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:18:01,215 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:18:01,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:18:01,222 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:18:01,222 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:18:01,222 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:18:01,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:18:01,223 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:18:01,224 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:18:01,224 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:18:01,224 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:18:01,225 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:18:01,225 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:18:01,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:18:01,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:18:01,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:18:01,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:18:01,226 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:18:01,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:18:01,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:18:01,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:18:01,227 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:18:01,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:18:01,228 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:18:01,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:18:01,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:18:01,228 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:18:01,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:18:01,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:18:01,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:18:01,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:18:01,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:18:01,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:18:01,230 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:18:01,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:18:01,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:18:01,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:18:01,231 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_97d55147-b50d-4d62-ba6a-94265c843653/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 385f60e373a6ce558a1e3490d71d989088c508fd [2021-10-16 02:18:01,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:18:01,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:18:01,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:18:01,575 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:18:01,576 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:18:01,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-10-16 02:18:01,676 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/4cb4e061f/12ae15a3f3be455aa34f22c882240609/FLAG7bffe60cb [2021-10-16 02:18:02,252 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:18:02,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-10-16 02:18:02,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/4cb4e061f/12ae15a3f3be455aa34f22c882240609/FLAG7bffe60cb [2021-10-16 02:18:02,550 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/4cb4e061f/12ae15a3f3be455aa34f22c882240609 [2021-10-16 02:18:02,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:18:02,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:18:02,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:18:02,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:18:02,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:18:02,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:18:02" (1/1) ... [2021-10-16 02:18:02,561 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4837d319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:02, skipping insertion in model container [2021-10-16 02:18:02,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:18:02" (1/1) ... [2021-10-16 02:18:02,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:18:02,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:18:02,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:18:02,966 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:18:03,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:18:03,072 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:18:03,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03 WrapperNode [2021-10-16 02:18:03,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:18:03,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:18:03,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:18:03,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:18:03,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:18:03,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:18:03,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:18:03,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:18:03,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:18:03,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:18:03,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:18:03,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:18:03,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (1/1) ... [2021-10-16 02:18:03,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:18:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:18:03,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:18:03,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:18:03,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:18:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:18:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:18:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:18:03,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:18:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:18:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:18:03,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:18:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:18:04,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:18:04,198 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-16 02:18:04,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:18:04 BoogieIcfgContainer [2021-10-16 02:18:04,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:18:04,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:18:04,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:18:04,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:18:04,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:18:02" (1/3) ... [2021-10-16 02:18:04,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1807d8a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:18:04, skipping insertion in model container [2021-10-16 02:18:04,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:03" (2/3) ... [2021-10-16 02:18:04,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1807d8a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:18:04, skipping insertion in model container [2021-10-16 02:18:04,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:18:04" (3/3) ... [2021-10-16 02:18:04,211 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2021-10-16 02:18:04,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:18:04,218 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2021-10-16 02:18:04,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:18:04,276 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 02:18:04,276 INFO L340 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2021-10-16 02:18:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 62 states have (on average 2.5161290322580645) internal successors, (156), 147 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 02:18:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 02:18:04,300 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:04,301 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 02:18:04,301 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash 8374, now seen corresponding path program 1 times [2021-10-16 02:18:04,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:04,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866791638] [2021-10-16 02:18:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:04,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:04,564 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 02:18:04,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:04,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866791638] [2021-10-16 02:18:04,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866791638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:04,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:04,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:18:04,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199560445] [2021-10-16 02:18:04,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:04,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:04,602 INFO L87 Difference]: Start difference. First operand has 148 states, 62 states have (on average 2.5161290322580645) internal successors, (156), 147 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:04,858 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2021-10-16 02:18:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-16 02:18:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:04,879 INFO L225 Difference]: With dead ends: 177 [2021-10-16 02:18:04,879 INFO L226 Difference]: Without dead ends: 176 [2021-10-16 02:18:04,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-16 02:18:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2021-10-16 02:18:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 62 states have (on average 2.435483870967742) internal successors, (151), 143 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2021-10-16 02:18:04,927 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 2 [2021-10-16 02:18:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:04,927 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2021-10-16 02:18:04,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2021-10-16 02:18:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-16 02:18:04,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:04,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-16 02:18:04,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:18:04,929 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 8375, now seen corresponding path program 1 times [2021-10-16 02:18:04,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:04,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709790325] [2021-10-16 02:18:04,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:04,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:04,981 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 02:18:04,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:04,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709790325] [2021-10-16 02:18:04,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709790325] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:04,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:04,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-16 02:18:04,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975506205] [2021-10-16 02:18:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:04,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:04,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:04,986 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:05,132 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2021-10-16 02:18:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-16 02:18:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:05,135 INFO L225 Difference]: With dead ends: 143 [2021-10-16 02:18:05,135 INFO L226 Difference]: Without dead ends: 143 [2021-10-16 02:18:05,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-16 02:18:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-10-16 02:18:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 62 states have (on average 2.403225806451613) internal successors, (149), 141 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-10-16 02:18:05,147 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 2 [2021-10-16 02:18:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:05,148 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-10-16 02:18:05,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-10-16 02:18:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:18:05,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:05,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:18:05,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:18:05,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash 8054183, now seen corresponding path program 1 times [2021-10-16 02:18:05,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:05,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764741712] [2021-10-16 02:18:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:05,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:05,194 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 02:18:05,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:05,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764741712] [2021-10-16 02:18:05,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764741712] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:05,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:05,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:18:05,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265231930] [2021-10-16 02:18:05,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:05,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,197 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. 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 02:18:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:05,331 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2021-10-16 02:18:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:05,332 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 02:18:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:05,334 INFO L225 Difference]: With dead ends: 167 [2021-10-16 02:18:05,334 INFO L226 Difference]: Without dead ends: 167 [2021-10-16 02:18:05,334 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 02:18:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-16 02:18:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 146. [2021-10-16 02:18:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 68 states have (on average 2.323529411764706) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2021-10-16 02:18:05,344 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 4 [2021-10-16 02:18:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:05,345 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2021-10-16 02:18:05,345 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 02:18:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2021-10-16 02:18:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:18:05,346 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:05,346 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:18:05,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:18:05,346 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 8054184, now seen corresponding path program 1 times [2021-10-16 02:18:05,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:05,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657713730] [2021-10-16 02:18:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:05,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:05,401 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 02:18:05,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:05,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657713730] [2021-10-16 02:18:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657713730] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:05,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:05,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:18:05,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973913390] [2021-10-16 02:18:05,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:05,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:05,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:05,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,405 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. 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 02:18:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:05,563 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2021-10-16 02:18:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:05,564 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 02:18:05,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:05,566 INFO L225 Difference]: With dead ends: 145 [2021-10-16 02:18:05,567 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:18:05,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:18:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-10-16 02:18:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 143 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 02:18:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2021-10-16 02:18:05,587 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 4 [2021-10-16 02:18:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:05,588 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2021-10-16 02:18:05,588 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 02:18:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2021-10-16 02:18:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:18:05,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:05,589 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:05,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:18:05,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash -575806137, now seen corresponding path program 1 times [2021-10-16 02:18:05,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:05,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198955928] [2021-10-16 02:18:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:05,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:05,656 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 02:18:05,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:05,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198955928] [2021-10-16 02:18:05,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198955928] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:05,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:05,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:18:05,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317107749] [2021-10-16 02:18:05,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:05,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:05,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,661 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:05,799 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2021-10-16 02:18:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:18:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:05,801 INFO L225 Difference]: With dead ends: 163 [2021-10-16 02:18:05,801 INFO L226 Difference]: Without dead ends: 163 [2021-10-16 02:18:05,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-16 02:18:05,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 134. [2021-10-16 02:18:05,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 133 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-10-16 02:18:05,815 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 7 [2021-10-16 02:18:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:05,816 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-10-16 02:18:05,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-10-16 02:18:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:18:05,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:05,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:05,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:18:05,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash -575806136, now seen corresponding path program 1 times [2021-10-16 02:18:05,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:05,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010527307] [2021-10-16 02:18:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:05,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:05,910 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 02:18:05,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:05,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010527307] [2021-10-16 02:18:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010527307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:05,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:05,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:18:05,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321324153] [2021-10-16 02:18:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:05,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:05,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:05,913 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:06,036 INFO L93 Difference]: Finished difference Result 125 states and 137 transitions. [2021-10-16 02:18:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:06,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:18:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:06,038 INFO L225 Difference]: With dead ends: 125 [2021-10-16 02:18:06,038 INFO L226 Difference]: Without dead ends: 125 [2021-10-16 02:18:06,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-16 02:18:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-10-16 02:18:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 68 states have (on average 2.0) internal successors, (136), 123 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 02:18:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2021-10-16 02:18:06,043 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 7 [2021-10-16 02:18:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:06,043 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2021-10-16 02:18:06,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2021-10-16 02:18:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:18:06,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:06,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:18:06,045 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:06,046 INFO L82 PathProgramCache]: Analyzing trace with hash -670121069, now seen corresponding path program 1 times [2021-10-16 02:18:06,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:06,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124426588] [2021-10-16 02:18:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:06,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:06,178 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 02:18:06,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:06,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124426588] [2021-10-16 02:18:06,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124426588] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:06,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:06,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:18:06,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394051659] [2021-10-16 02:18:06,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:18:06,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:18:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:18:06,187 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:06,373 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2021-10-16 02:18:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:18:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:18:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:06,375 INFO L225 Difference]: With dead ends: 145 [2021-10-16 02:18:06,375 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:18:06,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:18:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:18:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2021-10-16 02:18:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 118 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 02:18:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2021-10-16 02:18:06,380 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 8 [2021-10-16 02:18:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:06,380 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2021-10-16 02:18:06,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2021-10-16 02:18:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:18:06,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:06,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:06,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:18:06,384 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash -670121068, now seen corresponding path program 1 times [2021-10-16 02:18:06,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:06,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580423302] [2021-10-16 02:18:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:06,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:06,554 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 02:18:06,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:06,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580423302] [2021-10-16 02:18:06,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580423302] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:06,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:06,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:18:06,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317475828] [2021-10-16 02:18:06,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:18:06,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:18:06,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:18:06,558 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:06,842 INFO L93 Difference]: Finished difference Result 217 states and 236 transitions. [2021-10-16 02:18:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:18:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:18:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:06,844 INFO L225 Difference]: With dead ends: 217 [2021-10-16 02:18:06,844 INFO L226 Difference]: Without dead ends: 217 [2021-10-16 02:18:06,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:18:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-16 02:18:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 110. [2021-10-16 02:18:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 109 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2021-10-16 02:18:06,849 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 8 [2021-10-16 02:18:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:06,849 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2021-10-16 02:18:06,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2021-10-16 02:18:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:18:06,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:06,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:06,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:18:06,851 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1517715035, now seen corresponding path program 1 times [2021-10-16 02:18:06,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:06,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172733120] [2021-10-16 02:18:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:06,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:07,099 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 02:18:07,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172733120] [2021-10-16 02:18:07,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172733120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:07,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:07,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-16 02:18:07,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678012185] [2021-10-16 02:18:07,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:18:07,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:18:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:18:07,106 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 02:18:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:07,392 INFO L93 Difference]: Finished difference Result 147 states and 161 transitions. [2021-10-16 02:18:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:18:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 02:18:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:07,393 INFO L225 Difference]: With dead ends: 147 [2021-10-16 02:18:07,394 INFO L226 Difference]: Without dead ends: 147 [2021-10-16 02:18:07,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-16 02:18:07,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-16 02:18:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 114. [2021-10-16 02:18:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 80 states have (on average 1.65) internal successors, (132), 113 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 02:18:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2021-10-16 02:18:07,396 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 15 [2021-10-16 02:18:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:07,397 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2021-10-16 02:18:07,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 02:18:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2021-10-16 02:18:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:18:07,397 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:07,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:07,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:18:07,398 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:07,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:07,398 INFO L82 PathProgramCache]: Analyzing trace with hash 740883687, now seen corresponding path program 1 times [2021-10-16 02:18:07,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:07,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284168299] [2021-10-16 02:18:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:07,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:07,621 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 02:18:07,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:07,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284168299] [2021-10-16 02:18:07,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284168299] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:07,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:07,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-16 02:18:07,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849805234] [2021-10-16 02:18:07,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:18:07,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:18:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:18:07,624 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 02:18:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:07,940 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-10-16 02:18:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:18:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 02:18:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:07,942 INFO L225 Difference]: With dead ends: 141 [2021-10-16 02:18:07,942 INFO L226 Difference]: Without dead ends: 141 [2021-10-16 02:18:07,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:18:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-16 02:18:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2021-10-16 02:18:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 115 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 02:18:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-10-16 02:18:07,946 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 16 [2021-10-16 02:18:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:07,946 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-10-16 02:18:07,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 02:18:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-10-16 02:18:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:18:07,948 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:07,948 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 02:18:07,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-16 02:18:07,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:07,949 INFO L82 PathProgramCache]: Analyzing trace with hash 541612490, now seen corresponding path program 1 times [2021-10-16 02:18:07,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:07,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42197353] [2021-10-16 02:18:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:07,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:08,043 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 02:18:08,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:08,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42197353] [2021-10-16 02:18:08,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42197353] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:08,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:08,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:18:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244635086] [2021-10-16 02:18:08,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:08,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:08,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:08,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:08,046 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 02:18:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:08,068 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2021-10-16 02:18:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 02:18:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:08,070 INFO L225 Difference]: With dead ends: 143 [2021-10-16 02:18:08,070 INFO L226 Difference]: Without dead ends: 143 [2021-10-16 02:18:08,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-16 02:18:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 106. [2021-10-16 02:18:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.5972222222222223) internal successors, (115), 105 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 02:18:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2021-10-16 02:18:08,074 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 21 [2021-10-16 02:18:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:08,075 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2021-10-16 02:18:08,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 02:18:08,076 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2021-10-16 02:18:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:18:08,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:08,076 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 02:18:08,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-16 02:18:08,077 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:08,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:08,078 INFO L82 PathProgramCache]: Analyzing trace with hash 541456003, now seen corresponding path program 1 times [2021-10-16 02:18:08,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:08,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183187213] [2021-10-16 02:18:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:08,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:08,193 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 02:18:08,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:08,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183187213] [2021-10-16 02:18:08,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183187213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:08,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:08,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:18:08,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675439576] [2021-10-16 02:18:08,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:18:08,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:18:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:18:08,200 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 02:18:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:08,353 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2021-10-16 02:18:08,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:18:08,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 02:18:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:08,355 INFO L225 Difference]: With dead ends: 137 [2021-10-16 02:18:08,355 INFO L226 Difference]: Without dead ends: 137 [2021-10-16 02:18:08,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:18:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-16 02:18:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2021-10-16 02:18:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.5833333333333333) internal successors, (114), 104 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 02:18:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 114 transitions. [2021-10-16 02:18:08,359 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 114 transitions. Word has length 21 [2021-10-16 02:18:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:08,359 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 114 transitions. [2021-10-16 02:18:08,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 02:18:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 114 transitions. [2021-10-16 02:18:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 02:18:08,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:08,360 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 02:18:08,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-16 02:18:08,361 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 541456004, now seen corresponding path program 1 times [2021-10-16 02:18:08,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:08,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956394604] [2021-10-16 02:18:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:08,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:08,459 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 02:18:08,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:08,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956394604] [2021-10-16 02:18:08,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956394604] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:08,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:08,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:18:08,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198038660] [2021-10-16 02:18:08,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:18:08,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:18:08,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:18:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:18:08,462 INFO L87 Difference]: Start difference. First operand 105 states and 114 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 02:18:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:08,640 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2021-10-16 02:18:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:18:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 02:18:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:08,642 INFO L225 Difference]: With dead ends: 114 [2021-10-16 02:18:08,642 INFO L226 Difference]: Without dead ends: 114 [2021-10-16 02:18:08,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:18:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-16 02:18:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-10-16 02:18:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 02:18:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-10-16 02:18:08,645 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 21 [2021-10-16 02:18:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:08,645 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-10-16 02:18:08,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 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 02:18:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-10-16 02:18:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:18:08,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:08,647 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:08,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-16 02:18:08,647 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:08,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1339952633, now seen corresponding path program 1 times [2021-10-16 02:18:08,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:18:08,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702851821] [2021-10-16 02:18:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:08,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:18:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:18:09,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:18:09,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702851821] [2021-10-16 02:18:09,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702851821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:18:09,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715245765] [2021-10-16 02:18:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:09,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:18:09,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:18:09,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:18:09,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:18:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-16 02:18:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:09,235 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 02:18:09,316 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-16 02:18:09,317 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 17 treesize of output 21 [2021-10-16 02:18:09,526 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-16 02:18:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-10-16 02:18:10,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-16 02:18:10,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-16 02:18:10,330 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-16 02:18:10,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 62 [2021-10-16 02:18:10,810 INFO L354 Elim1Store]: treesize reduction 108, result has 27.0 percent of original size [2021-10-16 02:18:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 117 [2021-10-16 02:18:11,050 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:18:11,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 73 [2021-10-16 02:18:11,967 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:18:11,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 82 [2021-10-16 02:18:12,213 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-10-16 02:18:12,214 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 91 [2021-10-16 02:18:12,512 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-10-16 02:18:12,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 75 [2021-10-16 02:18:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:18:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:14,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:14,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-10-16 02:18:23,716 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 34382 treesize of output 34286 [2021-10-16 02:18:23,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:18:23,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887474761] [2021-10-16 02:18:23,995 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-10-16 02:18:23,995 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:18:24,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:18:24,006 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:18:24,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:18:24,070 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,072 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:18:24,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,073 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:18:24,074 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:18:24,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:18:24,076 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-16 02:18:24,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:18:24,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:18:24,105 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:18:24,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:18:24,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:18:24,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:24,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-16 02:18:24,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:18:24,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:110, output treesize:113 [2021-10-16 02:18:24,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:24,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-16 02:18:24,341 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_149| 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 02:18:24,344 INFO L168 Benchmark]: Toolchain (without parser) took 21790.06 ms. Allocated memory was 102.8 MB in the beginning and 195.0 MB in the end (delta: 92.3 MB). Free memory was 69.0 MB in the beginning and 143.8 MB in the end (delta: -74.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:24,345 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory was 70.4 MB in the beginning and 70.4 MB in the end (delta: 66.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:18:24,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 517.05 ms. Allocated memory is still 102.8 MB. Free memory was 68.8 MB in the beginning and 52.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:24,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 109.01 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 52.6 MB in the beginning and 100.7 MB in the end (delta: -48.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:24,346 INFO L168 Benchmark]: Boogie Preprocessor took 59.63 ms. Allocated memory is still 123.7 MB. Free memory was 100.7 MB in the beginning and 100.2 MB in the end (delta: 493.7 kB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:24,346 INFO L168 Benchmark]: RCFGBuilder took 957.95 ms. Allocated memory is still 123.7 MB. Free memory was 100.2 MB in the beginning and 70.4 MB in the end (delta: 29.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:18:24,347 INFO L168 Benchmark]: TraceAbstraction took 20140.53 ms. Allocated memory was 123.7 MB in the beginning and 195.0 MB in the end (delta: 71.3 MB). Free memory was 69.9 MB in the beginning and 143.8 MB in the end (delta: -73.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:18:24,349 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 102.8 MB. Free memory was 70.4 MB in the beginning and 70.4 MB in the end (delta: 66.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 517.05 ms. Allocated memory is still 102.8 MB. Free memory was 68.8 MB in the beginning and 52.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 109.01 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 52.6 MB in the beginning and 100.7 MB in the end (delta: -48.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.63 ms. Allocated memory is still 123.7 MB. Free memory was 100.7 MB in the beginning and 100.2 MB in the end (delta: 493.7 kB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 957.95 ms. Allocated memory is still 123.7 MB. Free memory was 100.2 MB in the beginning and 70.4 MB in the end (delta: 29.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20140.53 ms. Allocated memory was 123.7 MB in the beginning and 195.0 MB in the end (delta: 71.3 MB). Free memory was 69.9 MB in the beginning and 143.8 MB in the end (delta: -73.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_149| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_149|: 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 02:18:24,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/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 02:18:26,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:18:26,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:18:26,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:18:26,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:18:26,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:18:26,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:18:27,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:18:27,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:18:27,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:18:27,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:18:27,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:18:27,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:18:27,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:18:27,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:18:27,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:18:27,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:18:27,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:18:27,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:18:27,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:18:27,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:18:27,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:18:27,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:18:27,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:18:27,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:18:27,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:18:27,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:18:27,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:18:27,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:18:27,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:18:27,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:18:27,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:18:27,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:18:27,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:18:27,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:18:27,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:18:27,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:18:27,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:18:27,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:18:27,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:18:27,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:18:27,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 02:18:27,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:18:27,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:18:27,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:18:27,077 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:18:27,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:18:27,078 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:18:27,078 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:18:27,078 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:18:27,078 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:18:27,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 02:18:27,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 02:18:27,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:18:27,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:18:27,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 02:18:27,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:18:27,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:18:27,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:18:27,083 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 02:18:27,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 02:18:27,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 02:18:27,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:18:27,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:18:27,084 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:18:27,084 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:18:27,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:18:27,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:18:27,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:18:27,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:18:27,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:18:27,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:18:27,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:18:27,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:18:27,087 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:18:27,087 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:18:27,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:18:27,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:18:27,088 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_97d55147-b50d-4d62-ba6a-94265c843653/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 385f60e373a6ce558a1e3490d71d989088c508fd [2021-10-16 02:18:27,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:18:27,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:18:27,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:18:27,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:18:27,551 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:18:27,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-10-16 02:18:27,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/6833c2836/17a05324e92e46a4a1745d639518d229/FLAG11db98078 [2021-10-16 02:18:28,263 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:18:28,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/sv-benchmarks/c/memsafety-ext2/length_test03-2.i [2021-10-16 02:18:28,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/6833c2836/17a05324e92e46a4a1745d639518d229/FLAG11db98078 [2021-10-16 02:18:28,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/data/6833c2836/17a05324e92e46a4a1745d639518d229 [2021-10-16 02:18:28,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:18:28,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:18:28,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:18:28,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:18:28,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:18:28,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:18:28" (1/1) ... [2021-10-16 02:18:28,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775e1431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:28, skipping insertion in model container [2021-10-16 02:18:28,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:18:28" (1/1) ... [2021-10-16 02:18:28,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:18:28,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:18:28,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:18:28,982 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:18:29,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:18:29,058 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:18:29,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29 WrapperNode [2021-10-16 02:18:29,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:18:29,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:18:29,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:18:29,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:18:29,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:18:29,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:18:29,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:18:29,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:18:29,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:18:29,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:18:29,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:18:29,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:18:29,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (1/1) ... [2021-10-16 02:18:29,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:18:29,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:18:29,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:18:29,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:18:29,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:18:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 02:18:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:18:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 02:18:29,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-16 02:18:29,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:18:29,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:18:29,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:18:29,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:18:30,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:18:30,508 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-16 02:18:30,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:18:30 BoogieIcfgContainer [2021-10-16 02:18:30,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:18:30,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:18:30,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:18:30,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:18:30,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:18:28" (1/3) ... [2021-10-16 02:18:30,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230fd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:18:30, skipping insertion in model container [2021-10-16 02:18:30,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:18:29" (2/3) ... [2021-10-16 02:18:30,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6230fd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:18:30, skipping insertion in model container [2021-10-16 02:18:30,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:18:30" (3/3) ... [2021-10-16 02:18:30,521 INFO L111 eAbstractionObserver]: Analyzing ICFG length_test03-2.i [2021-10-16 02:18:30,527 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:18:30,528 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 85 error locations. [2021-10-16 02:18:30,581 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:18:30,589 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 02:18:30,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 85 error locations. [2021-10-16 02:18:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 81 states have (on average 2.197530864197531) internal successors, (178), 166 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 02:18:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:18:30,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:30,631 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:18:30,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:30,638 INFO L82 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-10-16 02:18:30,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:30,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425061693] [2021-10-16 02:18:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:30,653 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:30,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:30,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:30,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:18:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:18:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:30,835 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 02:18:30,858 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 02:18:30,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:30,875 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 02:18:30,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:30,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425061693] [2021-10-16 02:18:30,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425061693] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:30,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:30,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:18:30,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915112161] [2021-10-16 02:18:30,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:30,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:30,901 INFO L87 Difference]: Start difference. First operand has 167 states, 81 states have (on average 2.197530864197531) internal successors, (178), 166 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:31,419 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2021-10-16 02:18:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:31,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:18:31,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:31,436 INFO L225 Difference]: With dead ends: 201 [2021-10-16 02:18:31,437 INFO L226 Difference]: Without dead ends: 199 [2021-10-16 02:18:31,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 02:18:31,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-16 02:18:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 162. [2021-10-16 02:18:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 80 states have (on average 2.1125) internal successors, (169), 161 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 02:18:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 169 transitions. [2021-10-16 02:18:31,497 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 169 transitions. Word has length 3 [2021-10-16 02:18:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:31,498 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 169 transitions. [2021-10-16 02:18:31,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 169 transitions. [2021-10-16 02:18:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 02:18:31,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:31,499 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 02:18:31,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:31,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:31,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-10-16 02:18:31,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:31,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134506910] [2021-10-16 02:18:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:31,715 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:31,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:31,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:18:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:18:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:31,806 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 02:18:31,824 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 02:18:31,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:31,883 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 02:18:31,883 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:31,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134506910] [2021-10-16 02:18:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134506910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:31,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:31,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:18:31,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468358134] [2021-10-16 02:18:31,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:18:31,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:18:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:18:31,888 INFO L87 Difference]: Start difference. First operand 162 states and 169 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:32,993 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2021-10-16 02:18:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:18:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 02:18:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:32,997 INFO L225 Difference]: With dead ends: 211 [2021-10-16 02:18:32,997 INFO L226 Difference]: Without dead ends: 211 [2021-10-16 02:18:32,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:18:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-16 02:18:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2021-10-16 02:18:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 2.125) internal successors, (221), 183 states have internal predecessors, (221), 0 states have call successors, (0), 0 states 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 02:18:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 221 transitions. [2021-10-16 02:18:33,014 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 221 transitions. Word has length 3 [2021-10-16 02:18:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:33,014 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 221 transitions. [2021-10-16 02:18:33,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 221 transitions. [2021-10-16 02:18:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:18:33,015 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:33,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:18:33,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:33,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:33,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:33,227 INFO L82 PathProgramCache]: Analyzing trace with hash 889446152, now seen corresponding path program 1 times [2021-10-16 02:18:33,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:33,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200920405] [2021-10-16 02:18:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:33,229 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:33,230 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:33,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:18:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:33,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:18:33,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:33,325 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 02:18:33,339 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 02:18:33,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:33,364 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 02:18:33,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:33,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200920405] [2021-10-16 02:18:33,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200920405] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:33,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:33,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:18:33,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197855713] [2021-10-16 02:18:33,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:33,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:33,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:33,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:33,381 INFO L87 Difference]: Start difference. First operand 184 states and 221 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:33,744 INFO L93 Difference]: Finished difference Result 212 states and 251 transitions. [2021-10-16 02:18:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:18:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:33,746 INFO L225 Difference]: With dead ends: 212 [2021-10-16 02:18:33,747 INFO L226 Difference]: Without dead ends: 212 [2021-10-16 02:18:33,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-16 02:18:33,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 189. [2021-10-16 02:18:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 111 states have (on average 2.081081081081081) internal successors, (231), 188 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 02:18:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 231 transitions. [2021-10-16 02:18:33,764 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 231 transitions. Word has length 6 [2021-10-16 02:18:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:33,764 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 231 transitions. [2021-10-16 02:18:33,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 231 transitions. [2021-10-16 02:18:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:18:33,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:33,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:18:33,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:33,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:33,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:33,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash 889446153, now seen corresponding path program 1 times [2021-10-16 02:18:33,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:33,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530046544] [2021-10-16 02:18:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:33,983 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:33,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:33,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:33,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:18:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:34,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:18:34,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:34,095 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 02:18:34,117 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 02:18:34,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:34,177 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 02:18:34,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:34,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530046544] [2021-10-16 02:18:34,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530046544] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:34,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:34,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:18:34,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586299540] [2021-10-16 02:18:34,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:18:34,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:34,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:18:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:18:34,179 INFO L87 Difference]: Start difference. First operand 189 states and 231 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:35,108 INFO L93 Difference]: Finished difference Result 272 states and 294 transitions. [2021-10-16 02:18:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:18:35,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 02:18:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:35,111 INFO L225 Difference]: With dead ends: 272 [2021-10-16 02:18:35,111 INFO L226 Difference]: Without dead ends: 272 [2021-10-16 02:18:35,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:18:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-16 02:18:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 187. [2021-10-16 02:18:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 111 states have (on average 2.063063063063063) internal successors, (229), 186 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-10-16 02:18:35,127 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 6 [2021-10-16 02:18:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:35,127 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-10-16 02:18:35,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-10-16 02:18:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:18:35,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:35,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:35,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:35,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:35,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1113926380, now seen corresponding path program 1 times [2021-10-16 02:18:35,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:35,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361892960] [2021-10-16 02:18:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:35,342 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:35,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:35,343 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:35,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:18:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:35,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:18:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:35,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 02:18:35,470 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 02:18:35,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:35,494 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 02:18:35,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:35,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361892960] [2021-10-16 02:18:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361892960] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:35,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:35,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:18:35,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921213939] [2021-10-16 02:18:35,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:18:35,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:18:35,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:35,498 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:35,884 INFO L93 Difference]: Finished difference Result 210 states and 247 transitions. [2021-10-16 02:18:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:35,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:18:35,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:35,887 INFO L225 Difference]: With dead ends: 210 [2021-10-16 02:18:35,887 INFO L226 Difference]: Without dead ends: 210 [2021-10-16 02:18:35,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:18:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-16 02:18:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 177. [2021-10-16 02:18:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 111 states have (on average 1.927927927927928) internal successors, (214), 176 states have internal predecessors, (214), 0 states have call successors, (0), 0 states 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 02:18:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 214 transitions. [2021-10-16 02:18:35,895 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 214 transitions. Word has length 10 [2021-10-16 02:18:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:35,896 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 214 transitions. [2021-10-16 02:18:35,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 214 transitions. [2021-10-16 02:18:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:18:35,897 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:35,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:35,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:36,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:36,117 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1113926381, now seen corresponding path program 1 times [2021-10-16 02:18:36,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:36,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237133429] [2021-10-16 02:18:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:36,118 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:36,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:36,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:36,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:18:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:18:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:36,236 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 02:18:36,258 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 02:18:36,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:36,325 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 02:18:36,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:36,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237133429] [2021-10-16 02:18:36,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237133429] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:36,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:36,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:18:36,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672990628] [2021-10-16 02:18:36,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:18:36,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:18:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:18:36,328 INFO L87 Difference]: Start difference. First operand 177 states and 214 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:36,647 INFO L93 Difference]: Finished difference Result 167 states and 199 transitions. [2021-10-16 02:18:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:18:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-16 02:18:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:36,649 INFO L225 Difference]: With dead ends: 167 [2021-10-16 02:18:36,649 INFO L226 Difference]: Without dead ends: 167 [2021-10-16 02:18:36,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:18:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-16 02:18:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-10-16 02:18:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 111 states have (on average 1.7927927927927927) internal successors, (199), 166 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 02:18:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2021-10-16 02:18:36,655 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 10 [2021-10-16 02:18:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:36,656 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2021-10-16 02:18:36,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:18:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2021-10-16 02:18:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:18:36,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:36,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:36,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:36,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:36,865 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash 171979406, now seen corresponding path program 1 times [2021-10-16 02:18:36,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:36,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222311616] [2021-10-16 02:18:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:36,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:36,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:36,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:18:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:36,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:18:36,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:36,993 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 02:18:37,051 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:18:37,051 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 23 treesize of output 30 [2021-10-16 02:18:37,356 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:18:37,356 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 42 treesize of output 53 [2021-10-16 02:18:37,526 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 02:18:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:39,694 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 02:18:39,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:39,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222311616] [2021-10-16 02:18:39,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222311616] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:39,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:39,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:18:39,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243430057] [2021-10-16 02:18:39,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:18:39,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:18:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-10-16 02:18:39,697 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 02:18:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:40,375 INFO L93 Difference]: Finished difference Result 187 states and 212 transitions. [2021-10-16 02:18:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:18:40,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 11 [2021-10-16 02:18:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:40,377 INFO L225 Difference]: With dead ends: 187 [2021-10-16 02:18:40,377 INFO L226 Difference]: Without dead ends: 187 [2021-10-16 02:18:40,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2170.9ms TimeCoverageRelationStatistics Valid=22, Invalid=33, Unknown=1, NotChecked=0, Total=56 [2021-10-16 02:18:40,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-10-16 02:18:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 154. [2021-10-16 02:18:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.6126126126126126) internal successors, (179), 153 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 02:18:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2021-10-16 02:18:40,383 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 11 [2021-10-16 02:18:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:40,384 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2021-10-16 02:18:40,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 02:18:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2021-10-16 02:18:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:18:40,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:40,385 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:18:40,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:40,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:40,597 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash 171979407, now seen corresponding path program 1 times [2021-10-16 02:18:40,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:40,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776945967] [2021-10-16 02:18:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:40,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:40,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:40,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:40,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:18:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:40,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:18:40,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:40,764 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 02:18:40,773 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 02:18:40,846 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:18:40,846 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 31 treesize of output 33 [2021-10-16 02:18:40,869 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 02:18:40,869 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 30 treesize of output 30 [2021-10-16 02:18:41,071 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-16 02:18:41,072 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 21 treesize of output 34 [2021-10-16 02:18:41,505 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 02:18:41,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:44,816 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 02:18:44,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:18:44,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776945967] [2021-10-16 02:18:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776945967] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:18:44,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:18:44,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:18:44,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003053656] [2021-10-16 02:18:44,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:18:44,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:18:44,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:18:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-10-16 02:18:44,819 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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 02:18:51,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:18:51,988 INFO L93 Difference]: Finished difference Result 361 states and 396 transitions. [2021-10-16 02:18:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:18:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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 11 [2021-10-16 02:18:51,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:18:51,993 INFO L225 Difference]: With dead ends: 361 [2021-10-16 02:18:51,994 INFO L226 Difference]: Without dead ends: 361 [2021-10-16 02:18:51,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 7833.6ms TimeCoverageRelationStatistics Valid=69, Invalid=140, Unknown=1, NotChecked=0, Total=210 [2021-10-16 02:18:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-10-16 02:18:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 121. [2021-10-16 02:18:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 87 states have (on average 1.528735632183908) internal successors, (133), 120 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 02:18:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2021-10-16 02:18:52,002 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 11 [2021-10-16 02:18:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:18:52,002 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2021-10-16 02:18:52,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 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 02:18:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2021-10-16 02:18:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:18:52,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:18:52,004 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 02:18:52,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:18:52,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:18:52,217 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:18:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:18:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 719743272, now seen corresponding path program 1 times [2021-10-16 02:18:52,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:18:52,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219468124] [2021-10-16 02:18:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:18:52,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:18:52,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:18:52,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:18:52,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:18:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:18:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:18:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:18:52,451 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 02:18:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:18:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-16 02:18:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:18:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:52,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:18:52,623 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:18:52,623 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 22 treesize of output 29 [2021-10-16 02:18:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:18:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:52,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-16 02:18:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:52,946 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-10-16 02:18:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 91 [2021-10-16 02:18:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:18:52,996 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-10-16 02:18:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 87 [2021-10-16 02:18:53,318 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-16 02:18:53,318 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 70 treesize of output 72 [2021-10-16 02:18:53,593 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-10-16 02:18:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 100 [2021-10-16 02:18:53,695 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-10-16 02:18:53,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 85 [2021-10-16 02:18:53,844 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-16 02:18:53,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 57 [2021-10-16 02:18:53,855 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-16 02:18:53,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 23 [2021-10-16 02:18:53,930 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 02:18:53,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:18:54,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:54,021 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-10-16 02:18:54,026 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:18:54,027 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-10-16 02:19:03,269 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~node~0.base_47 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_47))))) (and (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| v_ULTIMATE.start_append_~node~0.base_47 (store (select |c_#memory_$Pointer$.offset| v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_1)) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32))) (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_47 (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_2)) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32)))))) is different from false [2021-10-16 02:19:05,411 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~node~0.base_47 (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list2~0.offset) (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_append_~node~0.base_47 (store (select .cse0 v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_2))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32))) (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list2~0.offset) (_ bv0 32))))) (store .cse1 v_ULTIMATE.start_append_~node~0.base_47 (store (select .cse1 v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_1))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_47))))))) is different from false [2021-10-16 02:19:07,534 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~node~0.base_47 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_47))))) (and (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_main_~list2~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base) ULTIMATE.start_main_~list2~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~list2~0.offset) (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_append_~node~0.base_47 (store (select .cse0 v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_1))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32))) (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (ULTIMATE.start_main_~list2~0.offset (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base) ULTIMATE.start_main_~list2~0.offset (_ bv0 32)) (bvadd (_ bv4 32) ULTIMATE.start_main_~list2~0.offset) (_ bv0 32))))) (store .cse1 v_ULTIMATE.start_append_~node~0.base_47 (store (select .cse1 v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_2))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32)))))) is different from false [2021-10-16 02:19:14,986 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 02:19:14,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:19:14,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219468124] [2021-10-16 02:19:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219468124] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:19:14,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:19:14,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 20 [2021-10-16 02:19:14,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268324687] [2021-10-16 02:19:14,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:19:14,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:19:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:19:14,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=204, Unknown=7, NotChecked=96, Total=380 [2021-10-16 02:19:14,989 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:26,093 WARN L207 SmtUtils]: Spent 10.64 s on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-10-16 02:19:30,104 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset)) (.cse1 (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list~0.base)) (.cse5 (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list~0.base))) (and (exists ((v_arrayElimCell_13 (_ BitVec 1))) (let ((.cse0 (bvneg v_arrayElimCell_13))) (and (= (_ bv0 1) (bvadd (bvneg .cse0) (_ bv1 1))) (= (_ bv0 1) (bvadd .cse0 (select |c_#valid| c_ULTIMATE.start_main_~list~0.base)))))) (= c_ULTIMATE.start_main_~list~0.offset (_ bv0 32)) (= (select .cse1 .cse2) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| c_ULTIMATE.start_main_~list2~0.base))) (_ bv1 1))) (forall ((v_ULTIMATE.start_append_~node~0.base_47 (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list2~0.offset) (_ bv0 32))))) (store .cse3 v_ULTIMATE.start_append_~node~0.base_47 (store (select .cse3 v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_2))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32))) (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list2~0.offset) (_ bv0 32))))) (store .cse4 v_ULTIMATE.start_append_~node~0.base_47 (store (select .cse4 v_ULTIMATE.start_append_~node~0.base_47) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_1))) c_ULTIMATE.start_main_~list~0.base) c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_47))))))) (= (select (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_main_~list2~0.base) c_ULTIMATE.start_main_~list2~0.offset) (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~list2~0.base) c_ULTIMATE.start_main_~list2~0.offset) (_ bv0 32)) (= (_ bv0 32) (select .cse5 .cse2)) (= (select .cse1 c_ULTIMATE.start_main_~list~0.offset) (_ bv0 32)) (= (_ bv0 32) (select .cse5 c_ULTIMATE.start_main_~list~0.offset)) (not (= c_ULTIMATE.start_main_~list2~0.base c_ULTIMATE.start_main_~list~0.base)))) is different from false [2021-10-16 02:19:46,516 WARN L207 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-10-16 02:19:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:19:59,898 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2021-10-16 02:19:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-16 02:19:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-16 02:19:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:19:59,900 INFO L225 Difference]: With dead ends: 171 [2021-10-16 02:19:59,901 INFO L226 Difference]: Without dead ends: 171 [2021-10-16 02:19:59,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 50111.3ms TimeCoverageRelationStatistics Valid=147, Invalid=409, Unknown=12, NotChecked=188, Total=756 [2021-10-16 02:19:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-16 02:19:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2021-10-16 02:19:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.5) internal successors, (138), 125 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2021-10-16 02:19:59,910 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 20 [2021-10-16 02:19:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:19:59,910 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2021-10-16 02:19:59,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:19:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2021-10-16 02:19:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:19:59,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:19:59,912 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 02:19:59,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:20:00,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:20:00,124 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:20:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:20:00,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1685508437, now seen corresponding path program 1 times [2021-10-16 02:20:00,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:20:00,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916398157] [2021-10-16 02:20:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:20:00,125 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:20:00,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:20:00,126 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:20:00,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:20:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:20:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 02:20:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:20:00,343 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 02:20:00,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:20:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:20:00,493 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:20:00,494 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 23 treesize of output 30 [2021-10-16 02:20:00,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:20:00,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-16 02:20:00,848 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 02:20:00,848 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 72 treesize of output 74 [2021-10-16 02:20:00,899 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 02:20:00,899 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 68 treesize of output 70 [2021-10-16 02:20:01,272 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-16 02:20:01,273 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 70 treesize of output 72 [2021-10-16 02:20:01,661 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-10-16 02:20:01,661 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 93 treesize of output 87 [2021-10-16 02:20:01,749 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-10-16 02:20:01,750 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 78 treesize of output 72 [2021-10-16 02:20:02,278 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 02:20:02,279 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 02:20:02,296 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-16 02:20:02,296 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 42 treesize of output 20 [2021-10-16 02:20:02,410 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 02:20:02,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:20:02,582 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:20:02,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-16 02:20:02,587 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:20:02,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-16 02:20:04,616 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_append_~node~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_append_~node~0.base) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_3)) c_ULTIMATE.start_append_~head.base) (bvadd (_ bv4 32) c_ULTIMATE.start_append_~head.offset)) (_ bv0 32))) (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_4)) c_ULTIMATE.start_append_~head.base) (bvadd (_ bv4 32) c_ULTIMATE.start_append_~head.offset)) (_ bv0 32)))) is different from false [2021-10-16 02:20:48,826 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 02:20:48,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:20:48,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916398157] [2021-10-16 02:20:48,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916398157] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:20:48,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:20:48,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-10-16 02:20:48,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915825666] [2021-10-16 02:20:48,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:20:48,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:20:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:20:48,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=185, Unknown=19, NotChecked=30, Total=306 [2021-10-16 02:20:48,828 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 02:21:00,066 WARN L207 SmtUtils]: Spent 8.45 s on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-10-16 02:21:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:10,543 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2021-10-16 02:21:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-16 02:21:10,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 22 [2021-10-16 02:21:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:10,545 INFO L225 Difference]: With dead ends: 164 [2021-10-16 02:21:10,545 INFO L226 Difference]: Without dead ends: 164 [2021-10-16 02:21:10,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 57179.3ms TimeCoverageRelationStatistics Valid=135, Invalid=355, Unknown=20, NotChecked=42, Total=552 [2021-10-16 02:21:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-16 02:21:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 129. [2021-10-16 02:21:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.4842105263157894) internal successors, (141), 128 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 02:21:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 141 transitions. [2021-10-16 02:21:10,551 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 141 transitions. Word has length 22 [2021-10-16 02:21:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:10,552 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 141 transitions. [2021-10-16 02:21:10,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 02:21:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 141 transitions. [2021-10-16 02:21:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:21:10,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:10,553 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] [2021-10-16 02:21:10,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:10,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:10,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:21:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1028150688, now seen corresponding path program 1 times [2021-10-16 02:21:10,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:10,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347303621] [2021-10-16 02:21:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:10,770 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:10,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:10,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:21:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:21:11,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:11,079 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 02:21:11,149 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:21:11,149 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 22 treesize of output 29 [2021-10-16 02:21:11,993 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 02:21:11,993 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 02:21:12,111 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 02:21:12,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:15,984 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 02:21:15,984 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:15,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347303621] [2021-10-16 02:21:15,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347303621] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:15,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:15,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:21:15,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355909467] [2021-10-16 02:21:15,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:21:15,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:15,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:21:15,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-10-16 02:21:15,986 INFO L87 Difference]: Start difference. First operand 129 states and 141 transitions. Second operand has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:16,970 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2021-10-16 02:21:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:21:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:21:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:16,973 INFO L225 Difference]: With dead ends: 173 [2021-10-16 02:21:16,973 INFO L226 Difference]: Without dead ends: 173 [2021-10-16 02:21:16,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 14 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4132.1ms TimeCoverageRelationStatistics Valid=22, Invalid=33, Unknown=1, NotChecked=0, Total=56 [2021-10-16 02:21:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-16 02:21:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2021-10-16 02:21:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.4736842105263157) internal successors, (140), 127 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 02:21:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2021-10-16 02:21:16,978 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 25 [2021-10-16 02:21:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:16,979 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2021-10-16 02:21:16,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2021-10-16 02:21:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-16 02:21:16,980 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:16,981 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] [2021-10-16 02:21:16,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:17,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:17,185 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:21:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1028150687, now seen corresponding path program 1 times [2021-10-16 02:21:17,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:17,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422118806] [2021-10-16 02:21:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:17,187 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:17,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:17,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:21:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:21:17,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:17,571 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 02:21:17,581 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 02:21:17,676 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 02:21:17,676 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 27 treesize of output 29 [2021-10-16 02:21:17,683 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 02:21:17,683 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 26 treesize of output 22 [2021-10-16 02:21:18,075 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-10-16 02:21:18,075 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 17 treesize of output 30 [2021-10-16 02:21:18,223 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 02:21:18,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:22,786 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 02:21:22,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:22,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422118806] [2021-10-16 02:21:22,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422118806] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:22,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:22,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 02:21:22,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112345517] [2021-10-16 02:21:22,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:21:22,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:22,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:21:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=36, Unknown=1, NotChecked=0, Total=56 [2021-10-16 02:21:22,788 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:24,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:24,216 INFO L93 Difference]: Finished difference Result 220 states and 233 transitions. [2021-10-16 02:21:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:21:24,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-16 02:21:24,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:24,218 INFO L225 Difference]: With dead ends: 220 [2021-10-16 02:21:24,218 INFO L226 Difference]: Without dead ends: 220 [2021-10-16 02:21:24,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4330.9ms TimeCoverageRelationStatistics Valid=60, Invalid=95, Unknown=1, NotChecked=0, Total=156 [2021-10-16 02:21:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-10-16 02:21:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 120. [2021-10-16 02:21:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 95 states have (on average 1.368421052631579) internal successors, (130), 119 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 02:21:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2021-10-16 02:21:24,223 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 25 [2021-10-16 02:21:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:24,223 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2021-10-16 02:21:24,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:24,223 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2021-10-16 02:21:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:21:24,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:24,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:24,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:24,435 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr63REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:21:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1807900189, now seen corresponding path program 1 times [2021-10-16 02:21:24,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:24,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527380514] [2021-10-16 02:21:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:24,436 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:24,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:24,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:21:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:24,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:21:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:24,764 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 02:21:24,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:24,819 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 02:21:24,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:24,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527380514] [2021-10-16 02:21:24,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527380514] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:21:24,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:21:24,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:21:24,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486878565] [2021-10-16 02:21:24,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:21:24,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:21:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:21:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:21:24,821 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:21:24,884 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2021-10-16 02:21:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:21:24,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:21:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:21:24,886 INFO L225 Difference]: With dead ends: 166 [2021-10-16 02:21:24,886 INFO L226 Difference]: Without dead ends: 166 [2021-10-16 02:21:24,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:21:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-16 02:21:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2021-10-16 02:21:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 113 states have (on average 1.3274336283185841) internal successors, (150), 137 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 02:21:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 150 transitions. [2021-10-16 02:21:24,891 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 150 transitions. Word has length 26 [2021-10-16 02:21:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:21:24,891 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 150 transitions. [2021-10-16 02:21:24,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:21:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 150 transitions. [2021-10-16 02:21:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 02:21:24,893 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:21:24,893 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:21:24,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:21:25,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:21:25,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 81 more)] === [2021-10-16 02:21:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:21:25,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1778627636, now seen corresponding path program 1 times [2021-10-16 02:21:25,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:21:25,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315321657] [2021-10-16 02:21:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:25,095 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:21:25,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:21:25,096 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:21:25,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:21:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-16 02:21:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:25,618 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 02:21:25,672 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 02:21:25,673 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 17 treesize of output 22 [2021-10-16 02:21:25,796 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:21:25,797 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 22 treesize of output 29 [2021-10-16 02:21:26,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:21:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-16 02:21:26,598 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-16 02:21:26,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 46 [2021-10-16 02:21:26,846 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-10-16 02:21:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 76 [2021-10-16 02:21:27,083 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:21:27,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 61 [2021-10-16 02:21:27,666 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:21:27,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 70 [2021-10-16 02:21:27,958 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-10-16 02:21:27,958 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 81 [2021-10-16 02:21:28,178 INFO L354 Elim1Store]: treesize reduction 92, result has 1.1 percent of original size [2021-10-16 02:21:28,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 74 [2021-10-16 02:21:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:28,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:32,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:32,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:21:44,743 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.base_55 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_55 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_55 (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_55) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_5) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_55)))))) is different from false [2021-10-16 02:21:46,841 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~node~0.base_55 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.offset_47 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_55 (_ bv1 1)) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base) (bvadd c_ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_append_~node~0.base_55 (store (store (store (select .cse0 v_ULTIMATE.start_append_~node~0.base_55) v_ULTIMATE.start_append_~node~0.offset_47 v_DerPreprocessor_5) (bvadd v_ULTIMATE.start_append_~node~0.offset_47 (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd v_ULTIMATE.start_append_~node~0.offset_47 (_ bv5 32)) (_ bv0 32)))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_55)))))) is different from false [2021-10-16 02:21:48,895 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.base_55 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.offset_47 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_55 (_ bv1 1)) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv1 32)) (_ bv0 32)) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_append_~node~0.base_55 (store (store (store (select .cse0 v_ULTIMATE.start_append_~node~0.base_55) v_ULTIMATE.start_append_~node~0.offset_47 v_DerPreprocessor_5) (bvadd v_ULTIMATE.start_append_~node~0.offset_47 (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd v_ULTIMATE.start_append_~node~0.offset_47 (_ bv5 32)) (_ bv0 32)))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset)))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_55)))))) is different from false [2021-10-16 02:21:48,915 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 80045 treesize of output 79853 [2021-10-16 02:21:49,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:21:49,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315321657] [2021-10-16 02:21:49,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:21:49,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1405143020] [2021-10-16 02:21:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:21:49,344 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:21:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:21:49,348 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:21:49,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:21:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:21:50,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-16 02:21:50,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:21:50,165 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 02:21:50,295 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:21:50,295 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 22 treesize of output 29 [2021-10-16 02:21:50,611 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-16 02:21:50,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 64 [2021-10-16 02:21:51,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:21:52,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-16 02:21:52,505 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-16 02:21:52,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 70 [2021-10-16 02:21:53,009 INFO L354 Elim1Store]: treesize reduction 85, result has 36.6 percent of original size [2021-10-16 02:21:53,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 70 treesize of output 103 [2021-10-16 02:21:53,479 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:21:53,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 134 treesize of output 101 [2021-10-16 02:21:54,909 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:21:54,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 134 treesize of output 112 [2021-10-16 02:21:55,554 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-10-16 02:21:55,554 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 117 [2021-10-16 02:21:56,083 INFO L354 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2021-10-16 02:21:56,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 105 [2021-10-16 02:21:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:21:56,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:21:56,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:21:56,628 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:22:02,861 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_append_~node~0.base_56 (_ BitVec 32)) (ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_56 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_56 (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_56) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_5) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_56))))))) is different from false [2021-10-16 02:22:09,420 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 160110 treesize of output 159726 [2021-10-16 02:22:10,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:22:10,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462071860] [2021-10-16 02:22:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:22:10,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:10,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:22:10,118 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:22:10,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-16 02:22:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:22:10,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-16 02:22:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:22:10,763 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 02:22:10,764 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 24 treesize of output 31 [2021-10-16 02:22:11,031 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-16 02:22:11,032 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 37 treesize of output 39 [2021-10-16 02:22:11,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 02:22:11,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-16 02:22:12,051 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-16 02:22:12,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 45 [2021-10-16 02:22:12,372 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-10-16 02:22:12,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 63 [2021-10-16 02:22:12,761 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:22:12,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 70 [2021-10-16 02:22:13,443 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-10-16 02:22:13,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 79 [2021-10-16 02:22:13,812 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-10-16 02:22:13,813 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 86 [2021-10-16 02:22:14,185 INFO L354 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2021-10-16 02:22:14,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 72 [2021-10-16 02:22:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:22:14,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:22:14,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:22:14,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:22:25,073 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.base_57 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_57))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_57 (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_57 (store (store (store (select |c_#memory_$Pointer$.base| v_ULTIMATE.start_append_~node~0.base_57) ULTIMATE.start_append_~node~0.offset v_DerPreprocessor_5) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))))))) is different from false [2021-10-16 02:22:27,158 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.offset_57 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.base_57 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_57))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_57 (_ bv1 1)) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base) (bvadd c_ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_append_~node~0.base_57 (store (store (store (select .cse0 v_ULTIMATE.start_append_~node~0.base_57) v_ULTIMATE.start_append_~node~0.offset_57 v_DerPreprocessor_5) (bvadd v_ULTIMATE.start_append_~node~0.offset_57 (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd v_ULTIMATE.start_append_~node~0.offset_57 (_ bv5 32)) (_ bv0 32)))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))))))) is different from false [2021-10-16 02:22:29,219 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_append_~node~0.offset (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.offset_57 (_ BitVec 32)) (|ULTIMATE.start_append_#t~mem9.base| (_ BitVec 32)) (v_ULTIMATE.start_append_~node~0.base_57 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_ULTIMATE.start_append_~node~0.base_57))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_#valid| v_ULTIMATE.start_append_~node~0.base_57 (_ bv1 1)) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_append_~node~0.base) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv1 32)) (_ bv0 32)) (bvadd ULTIMATE.start_append_~node~0.offset (_ bv5 32)) (_ bv0 32))))) (store .cse0 v_ULTIMATE.start_append_~node~0.base_57 (store (store (store (select .cse0 v_ULTIMATE.start_append_~node~0.base_57) v_ULTIMATE.start_append_~node~0.offset_57 v_DerPreprocessor_5) (bvadd v_ULTIMATE.start_append_~node~0.offset_57 (_ bv1 32)) |ULTIMATE.start_append_#t~mem9.base|) (bvadd v_ULTIMATE.start_append_~node~0.offset_57 (_ bv5 32)) (_ bv0 32)))) c_ULTIMATE.start_main_~list~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~list~0.offset))))) (_ bv1 1))))) is different from false [2021-10-16 02:22:29,256 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 2496494 treesize of output 2490350 [2021-10-16 02:22:35,963 WARN L207 SmtUtils]: Spent 6.71 s on a formula simplification that was a NOOP. DAG size: 1086 [2021-10-16 02:22:35,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 02:22:35,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:22:35,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 02:22:35,986 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 02:22:35,986 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 02:22:35,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-16 02:22:35,995 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 02:22:35,995 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 02:22:35,995 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 02:22:35,995 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 02:22:35,995 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 02:22:35,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 02:22:35,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 02:22:35,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 02:22:35,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 02:22:35,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 02:22:35,996 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 02:22:35,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 02:22:35,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 02:22:35,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 02:22:35,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 02:22:35,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 02:22:35,997 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 02:22:35,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 02:22:35,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-16 02:22:35,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-16 02:22:35,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-16 02:22:35,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-16 02:22:35,998 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-16 02:22:35,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-16 02:22:35,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-16 02:22:35,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-16 02:22:35,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-16 02:22:35,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-16 02:22:35,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-16 02:22:36,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-16 02:22:36,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-16 02:22:36,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-16 02:22:36,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-16 02:22:36,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-16 02:22:36,000 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-16 02:22:36,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-16 02:22:36,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-16 02:22:36,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-16 02:22:36,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-16 02:22:36,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION [2021-10-16 02:22:36,001 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-10-16 02:22:36,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-10-16 02:22:36,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-16 02:22:36,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-16 02:22:36,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-16 02:22:36,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-16 02:22:36,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATION [2021-10-16 02:22:36,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54REQUIRES_VIOLATION [2021-10-16 02:22:36,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55REQUIRES_VIOLATION [2021-10-16 02:22:36,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56REQUIRES_VIOLATION [2021-10-16 02:22:36,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION [2021-10-16 02:22:36,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATION [2021-10-16 02:22:36,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59REQUIRES_VIOLATION [2021-10-16 02:22:36,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60REQUIRES_VIOLATION [2021-10-16 02:22:36,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61REQUIRES_VIOLATION [2021-10-16 02:22:36,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62REQUIRES_VIOLATION [2021-10-16 02:22:36,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63REQUIRES_VIOLATION [2021-10-16 02:22:36,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr64REQUIRES_VIOLATION [2021-10-16 02:22:36,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr65REQUIRES_VIOLATION [2021-10-16 02:22:36,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr68ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr69REQUIRES_VIOLATION [2021-10-16 02:22:36,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr70REQUIRES_VIOLATION [2021-10-16 02:22:36,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr71REQUIRES_VIOLATION [2021-10-16 02:22:36,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr72REQUIRES_VIOLATION [2021-10-16 02:22:36,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr73REQUIRES_VIOLATION [2021-10-16 02:22:36,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr74REQUIRES_VIOLATION [2021-10-16 02:22:36,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr75ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 02:22:36,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 02:22:36,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-16 02:22:36,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 02:22:36,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:22:36,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:22:36,622 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:22:36,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:22:36 BoogieIcfgContainer [2021-10-16 02:22:36,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:22:36,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:22:36,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:22:36,640 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:22:36,640 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:18:30" (3/4) ... [2021-10-16 02:22:36,644 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 02:22:36,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:22:36,645 INFO L168 Benchmark]: Toolchain (without parser) took 248102.06 ms. Allocated memory was 60.8 MB in the beginning and 274.7 MB in the end (delta: 213.9 MB). Free memory was 39.1 MB in the beginning and 202.1 MB in the end (delta: -162.9 MB). Peak memory consumption was 51.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:36,646 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 60.8 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:22:36,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 514.70 ms. Allocated memory is still 60.8 MB. Free memory was 38.9 MB in the beginning and 37.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:36,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.66 ms. Allocated memory is still 60.8 MB. Free memory was 36.9 MB in the beginning and 34.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:36,647 INFO L168 Benchmark]: Boogie Preprocessor took 65.64 ms. Allocated memory is still 60.8 MB. Free memory was 34.5 MB in the beginning and 32.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:36,647 INFO L168 Benchmark]: RCFGBuilder took 1323.82 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 32.3 MB in the beginning and 40.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:36,648 INFO L168 Benchmark]: TraceAbstraction took 246125.13 ms. Allocated memory was 79.7 MB in the beginning and 274.7 MB in the end (delta: 195.0 MB). Free memory was 40.4 MB in the beginning and 202.7 MB in the end (delta: -162.3 MB). Peak memory consumption was 157.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:22:36,648 INFO L168 Benchmark]: Witness Printer took 5.22 ms. Allocated memory is still 274.7 MB. Free memory was 202.7 MB in the beginning and 202.1 MB in the end (delta: 642.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:22:36,651 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 60.8 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 514.70 ms. Allocated memory is still 60.8 MB. Free memory was 38.9 MB in the beginning and 37.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.66 ms. Allocated memory is still 60.8 MB. Free memory was 36.9 MB in the beginning and 34.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.64 ms. Allocated memory is still 60.8 MB. Free memory was 34.5 MB in the beginning and 32.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1323.82 ms. Allocated memory was 60.8 MB in the beginning and 79.7 MB in the end (delta: 18.9 MB). Free memory was 32.3 MB in the beginning and 40.8 MB in the end (delta: -8.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 246125.13 ms. Allocated memory was 79.7 MB in the beginning and 274.7 MB in the end (delta: 195.0 MB). Free memory was 40.4 MB in the beginning and 202.7 MB in the end (delta: -162.3 MB). Peak memory consumption was 157.3 MB. Max. memory is 16.1 GB. * Witness Printer took 5.22 ms. Allocated memory is still 274.7 MB. Free memory was 202.7 MB in the beginning and 202.1 MB in the end (delta: 642.6 kB). 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: 562]: 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: [L566] struct list_t *list = malloc(sizeof *list); [L567] list->first = ((void *)0) [L568] list->last = ((void *)0) [L569] struct list_t *list2 = malloc(sizeof *list2); [L570] list2->first = ((void *)0) [L571] list2->last = ((void *)0) [L572] char userInput; [L574] char userInput = __VERIFIER_nondet_char(); [L551] struct node_t *node = malloc(sizeof *node); [L552] node->data = input [L553] EXPR head->first [L553] head->first == ((void *)0) && head->last == ((void *)0) [L553] EXPR head->last [L553] head->first == ((void *)0) && head->last == ((void *)0) [L553] COND TRUE head->first == ((void *)0) && head->last == ((void *)0) [L554] head->first = node [L555] head->last= node [L556] node->prev = ((void *)0) [L557] node->next = ((void *)0) [L576] COND TRUE __VERIFIER_nondet_int() [L574] char userInput = __VERIFIER_nondet_char(); [L551] struct node_t *node = malloc(sizeof *node); [L552] node->data = input [L553] EXPR head->first [L553] head->first == ((void *)0) && head->last == ((void *)0) [L553] COND FALSE !(head->first == ((void *)0) && head->last == ((void *)0)) [L560] EXPR head->last [L560] node->prev = head->last [L561] node->next = ((void *)0) [L562] EXPR head->last [L562] head->last->next = node - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 561]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 563]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 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: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: 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: 593]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 565]: 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, 167 locations, 85 error locations. Started 1 CEGAR loops. OverallTime: 246037.6ms, OverallIterations: 14, TraceHistogramMax: 2, EmptinessCheckTime: 40.4ms, AutomataDifference: 80663.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1085 SDtfs, 3161 SDslu, 2086 SDs, 0 SdLazy, 2574 SolverSat, 209 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 31545.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 249 SyntacticMatches, 15 SemanticMatches, 95 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 125883.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=3, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 135.6ms AutomataMinimizationTime, 13 MinimizatonAttempts, 731 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 139.1ms SsaConstructionTime, 803.2ms SatisfiabilityAnalysisTime, 88820.0ms InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 330 ConstructedInterpolants, 107 QuantifiedInterpolants, 5081 SizeOfPredicates, 66 NumberOfNonLiveVariables, 1127 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 26 InterpolantComputations, 26 PerfectInterpolantSequences, 0/0 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 02:22:36,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97d55147-b50d-4d62-ba6a-94265c843653/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...