./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c0706d1a5964bb8391155a217bd6084c2519a4607ef121976461541c97aecebc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:33:12,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:33:12,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:33:12,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:33:12,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:33:12,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:33:12,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:33:12,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:33:12,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:33:12,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:33:12,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:33:12,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:33:12,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:33:12,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:33:12,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:33:12,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:33:12,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:33:12,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:33:12,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:33:12,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:33:12,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:33:12,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:33:12,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:33:12,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:33:12,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:33:12,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:33:12,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:33:12,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:33:12,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:33:12,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:33:12,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:33:12,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:33:12,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:33:12,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:33:12,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:33:12,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:33:12,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:33:12,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:33:12,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:33:12,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:33:12,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:33:12,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 08:33:12,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:33:12,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:33:12,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:33:12,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:33:12,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:33:12,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:33:12,288 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:33:12,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:33:12,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:33:12,288 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:33:12,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:33:12,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:33:12,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:33:12,290 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:33:12,291 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:33:12,291 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:33:12,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:33:12,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:33:12,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:33:12,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:33:12,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:33:12,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:33:12,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:33:12,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:33:12,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:33:12,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:33:12,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:33:12,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:33:12,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:33:12,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0706d1a5964bb8391155a217bd6084c2519a4607ef121976461541c97aecebc [2021-11-09 08:33:12,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:33:12,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:33:12,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:33:12,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:33:12,632 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:33:12,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-2.i [2021-11-09 08:33:12,696 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/data/19e9c066b/a64401e46c584872a0bd8adb66f39c0d/FLAGae2c8c6b5 [2021-11-09 08:33:13,304 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:33:13,304 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-2.i [2021-11-09 08:33:13,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/data/19e9c066b/a64401e46c584872a0bd8adb66f39c0d/FLAGae2c8c6b5 [2021-11-09 08:33:13,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/data/19e9c066b/a64401e46c584872a0bd8adb66f39c0d [2021-11-09 08:33:13,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:33:13,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:33:13,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:33:13,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:33:13,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:33:13,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:33:13" (1/1) ... [2021-11-09 08:33:13,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5f7c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:13, skipping insertion in model container [2021-11-09 08:33:13,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:33:13" (1/1) ... [2021-11-09 08:33:13,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:33:13,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:33:14,039 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-2.i[24092,24105] [2021-11-09 08:33:14,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:33:14,055 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:33:14,116 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/sv-benchmarks/c/list-ext3-properties/sll_circular_traversal-2.i[24092,24105] [2021-11-09 08:33:14,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:33:14,157 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:33:14,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14 WrapperNode [2021-11-09 08:33:14,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:33:14,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:33:14,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:33:14,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:33:14,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:33:14,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:33:14,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:33:14,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:33:14,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (1/1) ... [2021-11-09 08:33:14,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:33:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:14,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:33:14,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:33:14,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 08:33:14,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:33:14,336 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 08:33:14,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 08:33:14,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 08:33:14,337 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-09 08:33:14,337 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-11-09 08:33:14,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 08:33:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 08:33:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 08:33:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 08:33:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 08:33:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 08:33:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:33:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 08:33:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 08:33:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 08:33:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 08:33:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 08:33:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 08:33:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 08:33:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 08:33:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 08:33:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 08:33:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 08:33:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 08:33:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 08:33:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 08:33:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 08:33:14,341 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 08:33:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 08:33:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 08:33:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 08:33:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 08:33:14,342 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 08:33:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 08:33:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 08:33:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 08:33:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 08:33:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 08:33:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 08:33:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 08:33:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 08:33:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 08:33:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 08:33:14,344 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 08:33:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 08:33:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 08:33:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 08:33:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 08:33:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 08:33:14,345 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 08:33:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 08:33:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 08:33:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 08:33:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 08:33:14,346 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 08:33:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 08:33:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 08:33:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 08:33:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 08:33:14,347 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 08:33:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 08:33:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 08:33:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 08:33:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 08:33:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 08:33:14,348 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 08:33:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 08:33:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 08:33:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-09 08:33:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 08:33:14,349 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 08:33:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 08:33:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 08:33:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 08:33:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 08:33:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 08:33:14,350 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 08:33:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 08:33:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 08:33:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 08:33:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 08:33:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 08:33:14,351 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 08:33:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 08:33:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 08:33:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 08:33:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 08:33:14,352 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 08:33:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 08:33:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 08:33:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 08:33:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 08:33:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 08:33:14,353 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 08:33:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 08:33:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 08:33:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 08:33:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 08:33:14,354 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 08:33:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 08:33:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 08:33:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 08:33:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 08:33:14,355 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 08:33:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 08:33:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 08:33:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 08:33:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 08:33:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 08:33:14,356 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 08:33:14,357 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 08:33:14,357 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 08:33:14,357 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 08:33:14,357 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 08:33:14,357 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 08:33:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 08:33:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-09 08:33:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-11-09 08:33:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:33:14,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:33:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:33:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 08:33:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:33:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:33:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:33:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 08:33:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:33:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:33:14,682 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-09 08:33:14,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:33:14,896 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-09 08:33:14,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:33:14 BoogieIcfgContainer [2021-11-09 08:33:14,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:33:14,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:33:14,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:33:14,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:33:14,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:33:13" (1/3) ... [2021-11-09 08:33:14,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561ca748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:33:14, skipping insertion in model container [2021-11-09 08:33:14,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:14" (2/3) ... [2021-11-09 08:33:14,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561ca748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:33:14, skipping insertion in model container [2021-11-09 08:33:14,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:33:14" (3/3) ... [2021-11-09 08:33:14,914 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_circular_traversal-2.i [2021-11-09 08:33:14,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:33:14,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-09 08:33:14,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:33:14,972 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, mAutomataTypeConcurrency=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 [2021-11-09 08:33:14,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-09 08:33:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 08:33:14,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:33:14,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:14,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:14,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1247263958, now seen corresponding path program 1 times [2021-11-09 08:33:15,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:15,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460613458] [2021-11-09 08:33:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:15,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:15,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:15,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460613458] [2021-11-09 08:33:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460613458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:15,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:15,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:33:15,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599765648] [2021-11-09 08:33:15,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:33:15,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:33:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:15,279 INFO L87 Difference]: Start difference. First operand has 72 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 64 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:15,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:15,501 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-09 08:33:15,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:33:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-09 08:33:15,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:15,511 INFO L225 Difference]: With dead ends: 69 [2021-11-09 08:33:15,512 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:33:15,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:33:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-09 08:33:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-11-09 08:33:15,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 10 [2021-11-09 08:33:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:15,557 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-11-09 08:33:15,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-11-09 08:33:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 08:33:15,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:15,560 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:15,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:33:15,561 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1247263959, now seen corresponding path program 1 times [2021-11-09 08:33:15,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:15,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519633027] [2021-11-09 08:33:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:15,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:15,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:15,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519633027] [2021-11-09 08:33:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519633027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:15,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:15,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:33:15,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39019409] [2021-11-09 08:33:15,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:33:15,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:33:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:15,658 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:15,780 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-11-09 08:33:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:33:15,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-09 08:33:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:15,785 INFO L225 Difference]: With dead ends: 59 [2021-11-09 08:33:15,785 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 08:33:15,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 08:33:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-09 08:33:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-09 08:33:15,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 10 [2021-11-09 08:33:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:15,800 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-09 08:33:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-09 08:33:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:33:15,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:15,802 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:15,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:33:15,802 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:15,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -738269866, now seen corresponding path program 1 times [2021-11-09 08:33:15,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:15,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009552312] [2021-11-09 08:33:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:15,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:15,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009552312] [2021-11-09 08:33:15,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009552312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:15,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:15,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:33:15,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545057442] [2021-11-09 08:33:15,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:33:15,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:15,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:33:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:15,960 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:16,100 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-09 08:33:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:33:16,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 08:33:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:16,112 INFO L225 Difference]: With dead ends: 62 [2021-11-09 08:33:16,112 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 08:33:16,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 08:33:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-11-09 08:33:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-11-09 08:33:16,126 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 15 [2021-11-09 08:33:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:16,127 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-11-09 08:33:16,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-11-09 08:33:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:33:16,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:16,129 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:16,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:33:16,129 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash -738269865, now seen corresponding path program 1 times [2021-11-09 08:33:16,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:16,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431282154] [2021-11-09 08:33:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:16,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:16,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:16,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431282154] [2021-11-09 08:33:16,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431282154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:16,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:16,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:33:16,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091658676] [2021-11-09 08:33:16,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:33:16,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:33:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:16,261 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:16,381 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-09 08:33:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:33:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 08:33:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:16,383 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:33:16,384 INFO L226 Difference]: Without dead ends: 60 [2021-11-09 08:33:16,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-09 08:33:16,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-11-09 08:33:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-09 08:33:16,394 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 15 [2021-11-09 08:33:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:16,394 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-09 08:33:16,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:33:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-09 08:33:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:33:16,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:16,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:16,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:33:16,396 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash -262950274, now seen corresponding path program 1 times [2021-11-09 08:33:16,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:16,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432276483] [2021-11-09 08:33:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:16,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:16,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432276483] [2021-11-09 08:33:16,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432276483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:16,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:16,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 08:33:16,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370846420] [2021-11-09 08:33:16,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:33:16,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:33:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:33:16,599 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:16,872 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-11-09 08:33:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:33:16,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-09 08:33:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:16,874 INFO L225 Difference]: With dead ends: 63 [2021-11-09 08:33:16,874 INFO L226 Difference]: Without dead ends: 63 [2021-11-09 08:33:16,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:33:16,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-09 08:33:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2021-11-09 08:33:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 51 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:33:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-09 08:33:16,879 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 19 [2021-11-09 08:33:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:16,880 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-09 08:33:16,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-09 08:33:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:33:16,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:16,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:16,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:33:16,882 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -262950273, now seen corresponding path program 1 times [2021-11-09 08:33:16,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:16,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383612463] [2021-11-09 08:33:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:16,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:16,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:16,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383612463] [2021-11-09 08:33:16,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383612463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:16,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:16,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:33:16,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849512037] [2021-11-09 08:33:16,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:33:16,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:33:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:33:16,975 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:17,143 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-11-09 08:33:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:33:17,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-09 08:33:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:17,145 INFO L225 Difference]: With dead ends: 60 [2021-11-09 08:33:17,145 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 08:33:17,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:33:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 08:33:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-11-09 08:33:17,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:17,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-09 08:33:17,149 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 19 [2021-11-09 08:33:17,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:17,149 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-09 08:33:17,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:17,150 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-09 08:33:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:33:17,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:17,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:17,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:33:17,151 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1739384034, now seen corresponding path program 1 times [2021-11-09 08:33:17,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:17,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200155275] [2021-11-09 08:33:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:17,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:17,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:17,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200155275] [2021-11-09 08:33:17,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200155275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:17,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:17,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:33:17,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140078656] [2021-11-09 08:33:17,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:33:17,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:33:17,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:33:17,269 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:17,501 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-09 08:33:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:33:17,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-09 08:33:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:17,503 INFO L225 Difference]: With dead ends: 58 [2021-11-09 08:33:17,503 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 08:33:17,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:33:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 08:33:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-09 08:33:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-11-09 08:33:17,507 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 24 [2021-11-09 08:33:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:17,507 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-11-09 08:33:17,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-11-09 08:33:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:33:17,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:17,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:17,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 08:33:17,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1739384033, now seen corresponding path program 1 times [2021-11-09 08:33:17,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:17,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657252663] [2021-11-09 08:33:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:17,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:17,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:17,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657252663] [2021-11-09 08:33:17,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657252663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:17,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:17,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 08:33:17,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303778424] [2021-11-09 08:33:17,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:33:17,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:17,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:33:17,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:33:17,691 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:17,950 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-11-09 08:33:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:33:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-09 08:33:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:17,951 INFO L225 Difference]: With dead ends: 63 [2021-11-09 08:33:17,951 INFO L226 Difference]: Without dead ends: 63 [2021-11-09 08:33:17,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:33:17,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-09 08:33:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-11-09 08:33:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.375) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-09 08:33:17,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 24 [2021-11-09 08:33:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:17,956 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-09 08:33:17,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-09 08:33:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:33:17,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:17,957 INFO L513 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] [2021-11-09 08:33:17,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 08:33:17,957 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash -805778576, now seen corresponding path program 1 times [2021-11-09 08:33:17,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:17,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712737491] [2021-11-09 08:33:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:17,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:18,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:18,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712737491] [2021-11-09 08:33:18,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712737491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:18,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872106109] [2021-11-09 08:33:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:18,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:18,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:18,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:18,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:33:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:33:18,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:18,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872106109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:18,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:18,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-11-09 08:33:18,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581965725] [2021-11-09 08:33:18,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 08:33:18,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 08:33:18,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:33:18,439 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:18,632 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-11-09 08:33:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:33:18,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-09 08:33:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:18,633 INFO L225 Difference]: With dead ends: 69 [2021-11-09 08:33:18,633 INFO L226 Difference]: Without dead ends: 65 [2021-11-09 08:33:18,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:33:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-09 08:33:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2021-11-09 08:33:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-11-09 08:33:18,637 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 26 [2021-11-09 08:33:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:18,637 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-11-09 08:33:18,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-11-09 08:33:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:33:18,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:18,639 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:18,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:18,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 08:33:18,854 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1645244112, now seen corresponding path program 2 times [2021-11-09 08:33:18,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:18,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050610282] [2021-11-09 08:33:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:18,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:18,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050610282] [2021-11-09 08:33:18,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050610282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:18,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937528120] [2021-11-09 08:33:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:18,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:18,974 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:33:19,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:19,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:33:19,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:19,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937528120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:19,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:19,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-11-09 08:33:19,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661866730] [2021-11-09 08:33:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:33:19,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:33:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:33:19,258 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:19,431 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-11-09 08:33:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:33:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-09 08:33:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:19,434 INFO L225 Difference]: With dead ends: 74 [2021-11-09 08:33:19,434 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 08:33:19,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:33:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 08:33:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-11-09 08:33:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.3) internal successors, (65), 60 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-09 08:33:19,442 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 31 [2021-11-09 08:33:19,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:19,443 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-09 08:33:19,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-09 08:33:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 08:33:19,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:19,451 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:19,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:19,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:33:19,679 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1343743856, now seen corresponding path program 3 times [2021-11-09 08:33:19,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:19,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767095891] [2021-11-09 08:33:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:19,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:19,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:19,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:19,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767095891] [2021-11-09 08:33:19,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767095891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:19,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511099811] [2021-11-09 08:33:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:19,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:19,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:19,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:33:19,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 08:33:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:19,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:33:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:20,226 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 [2021-11-09 08:33:20,329 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-09 08:33:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-11-09 08:33:20,468 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 22 treesize of output 10 [2021-11-09 08:33:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 08:33:20,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511099811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:20,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:20,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-11-09 08:33:20,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883722793] [2021-11-09 08:33:20,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:33:20,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:33:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:33:20,496 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 20 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 08:33:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:21,441 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-11-09 08:33:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:33:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-11-09 08:33:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:21,443 INFO L225 Difference]: With dead ends: 79 [2021-11-09 08:33:21,443 INFO L226 Difference]: Without dead ends: 75 [2021-11-09 08:33:21,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:33:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-09 08:33:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-11-09 08:33:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-09 08:33:21,448 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 36 [2021-11-09 08:33:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:21,448 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-09 08:33:21,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 08:33:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-09 08:33:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:33:21,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:21,450 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:21,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:21,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 08:33:21,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash 798081134, now seen corresponding path program 1 times [2021-11-09 08:33:21,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:21,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36166450] [2021-11-09 08:33:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:21,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:21,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:21,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:33:22,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:22,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36166450] [2021-11-09 08:33:22,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36166450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:22,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393248235] [2021-11-09 08:33:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:22,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:22,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:22,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:33:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 08:33:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:22,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:22,645 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:33:22,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:33:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:33:22,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:22,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-09 08:33:22,871 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:33:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2021-11-09 08:33:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:23,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:23,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 31 [2021-11-09 08:33:23,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:23,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-11-09 08:33:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:33:23,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393248235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:23,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:23,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2021-11-09 08:33:23,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829807678] [2021-11-09 08:33:23,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:33:23,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:33:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:33:23,373 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:33:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:24,833 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-09 08:33:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 08:33:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-09 08:33:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:24,835 INFO L225 Difference]: With dead ends: 98 [2021-11-09 08:33:24,835 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 08:33:24,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:33:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 08:33:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-11-09 08:33:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 70 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2021-11-09 08:33:24,840 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 45 [2021-11-09 08:33:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:24,840 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2021-11-09 08:33:24,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 23 states have internal predecessors, (58), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:33:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2021-11-09 08:33:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:33:24,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:24,841 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:24,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:25,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 08:33:25,055 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash 798081135, now seen corresponding path program 1 times [2021-11-09 08:33:25,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:25,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300587828] [2021-11-09 08:33:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:25,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:25,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:33:25,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:25,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300587828] [2021-11-09 08:33:25,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300587828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:25,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336480114] [2021-11-09 08:33:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:25,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:25,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:25,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:33:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:25,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 08:33:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:25,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:26,031 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:33:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:33:26,099 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 [2021-11-09 08:33:26,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:33:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:26,173 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 27 treesize of output 11 [2021-11-09 08:33:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:26,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-09 08:33:26,300 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:33:26,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 42 [2021-11-09 08:33:26,313 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:33:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-09 08:33:26,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:26,877 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:33:26,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 73 [2021-11-09 08:33:26,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:26,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:26,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 45 [2021-11-09 08:33:26,988 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 08:33:26,989 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 62 treesize of output 49 [2021-11-09 08:33:27,003 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-11-09 08:33:27,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2021-11-09 08:33:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:33:27,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336480114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:27,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:27,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-11-09 08:33:27,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616582667] [2021-11-09 08:33:27,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:33:27,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:33:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:33:27,148 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:33:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:30,108 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2021-11-09 08:33:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:33:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-09 08:33:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:30,110 INFO L225 Difference]: With dead ends: 105 [2021-11-09 08:33:30,110 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 08:33:30,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:33:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 08:33:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-11-09 08:33:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 77 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-11-09 08:33:30,114 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 45 [2021-11-09 08:33:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:30,115 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-11-09 08:33:30,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:33:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-11-09 08:33:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:33:30,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:30,116 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:30,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:30,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:30,316 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:30,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1843176256, now seen corresponding path program 1 times [2021-11-09 08:33:30,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:30,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953664849] [2021-11-09 08:33:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:30,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:30,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:30,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:33:31,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953664849] [2021-11-09 08:33:31,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953664849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40465851] [2021-11-09 08:33:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:31,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:31,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:31,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:33:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:31,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 08:33:31,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:31,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:31,817 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:33:31,817 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 [2021-11-09 08:33:31,984 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 08:33:31,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 08:33:32,155 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-09 08:33:32,155 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 20 treesize of output 22 [2021-11-09 08:33:32,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 08:33:32,432 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 38 treesize of output 34 [2021-11-09 08:33:32,434 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 35 treesize of output 23 [2021-11-09 08:33:32,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:33:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:32,512 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 52 treesize of output 32 [2021-11-09 08:33:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:32,524 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:33:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-09 08:33:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:32,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:33:32,726 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:33:32,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 72 [2021-11-09 08:33:32,737 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:33:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 71 [2021-11-09 08:33:32,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:32,747 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:32,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-11-09 08:33:34,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:33:34,248 INFO L354 Elim1Store]: treesize reduction 64, result has 14.7 percent of original size [2021-11-09 08:33:34,248 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 122 treesize of output 113 [2021-11-09 08:33:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:34,256 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:33:34,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 85 [2021-11-09 08:33:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:34,263 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:34,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 57 [2021-11-09 08:33:34,630 INFO L354 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2021-11-09 08:33:34,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 64 [2021-11-09 08:33:34,649 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-09 08:33:34,649 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 52 treesize of output 43 [2021-11-09 08:33:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:33:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:33:34,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40465851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:34,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:34,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-11-09 08:33:34,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483342880] [2021-11-09 08:33:34,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 08:33:34,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 08:33:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1440, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 08:33:34,922 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:33:38,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:38,801 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-11-09 08:33:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 08:33:38,801 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-11-09 08:33:38,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:38,802 INFO L225 Difference]: With dead ends: 88 [2021-11-09 08:33:38,802 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 08:33:38,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=398, Invalid=2908, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:33:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 08:33:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-11-09 08:33:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 77 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-09 08:33:38,808 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 47 [2021-11-09 08:33:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:38,808 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-09 08:33:38,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:33:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-09 08:33:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:33:38,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:38,810 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:38,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:39,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:39,023 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1304999678, now seen corresponding path program 1 times [2021-11-09 08:33:39,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:39,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388888696] [2021-11-09 08:33:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:39,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:33:39,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:39,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388888696] [2021-11-09 08:33:39,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388888696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:39,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178435374] [2021-11-09 08:33:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:39,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:39,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:39,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:33:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 08:33:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:39,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:39,785 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:33:39,786 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 [2021-11-09 08:33:39,963 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 08:33:39,963 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 [2021-11-09 08:33:40,301 INFO L354 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2021-11-09 08:33:40,301 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 6 case distinctions, treesize of input 34 treesize of output 42 [2021-11-09 08:33:41,203 INFO L354 Elim1Store]: treesize reduction 120, result has 23.6 percent of original size [2021-11-09 08:33:41,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 44 treesize of output 69 [2021-11-09 08:33:41,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:33:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:41,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-11-09 08:33:43,911 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:33:43,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 63 [2021-11-09 08:33:44,665 INFO L354 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2021-11-09 08:33:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 70 [2021-11-09 08:33:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:44,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:44,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2021-11-09 08:33:44,773 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-09 08:33:44,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 21 [2021-11-09 08:33:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:44,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178435374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:44,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:33:44,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [18] total 31 [2021-11-09 08:33:44,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889617323] [2021-11-09 08:33:44,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:33:44,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:44,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:33:44,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:33:44,797 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:54,342 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-11-09 08:33:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 08:33:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-11-09 08:33:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:54,343 INFO L225 Difference]: With dead ends: 78 [2021-11-09 08:33:54,343 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 08:33:54,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:33:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 08:33:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-09 08:33:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:33:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-09 08:33:54,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 48 [2021-11-09 08:33:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:54,348 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-09 08:33:54,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:33:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-09 08:33:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:33:54,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:54,349 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:54,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:54,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:54,559 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:33:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -461647266, now seen corresponding path program 2 times [2021-11-09 08:33:54,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:54,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205250109] [2021-11-09 08:33:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:54,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:55,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:33:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:55,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:33:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:56,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205250109] [2021-11-09 08:33:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205250109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305874269] [2021-11-09 08:33:56,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:56,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:56,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:56,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:56,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:33:56,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 08:33:56,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:56,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:56,642 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:33:56,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:33:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:33:56,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:56,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-09 08:33:56,863 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-09 08:33:56,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 08:33:56,960 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 [2021-11-09 08:33:56,982 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:33:56,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-11-09 08:33:57,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:57,086 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 27 treesize of output 11 [2021-11-09 08:33:57,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:57,094 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:33:57,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2021-11-09 08:33:57,340 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-09 08:33:57,340 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 69 treesize of output 82 [2021-11-09 08:33:57,356 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 08:33:57,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2021-11-09 08:34:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:01,153 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-09 08:34:01,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 146 treesize of output 102 [2021-11-09 08:34:01,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:01,170 INFO L354 Elim1Store]: treesize reduction 51, result has 12.1 percent of original size [2021-11-09 08:34:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 114 [2021-11-09 08:34:01,719 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-09 08:34:01,720 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 115 treesize of output 102 [2021-11-09 08:34:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:02,972 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-09 08:34:02,972 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 56 [2021-11-09 08:34:03,039 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-09 08:34:03,039 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 47 [2021-11-09 08:34:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 33 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:09,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305874269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:09,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:09,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 43 [2021-11-09 08:34:09,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238858137] [2021-11-09 08:34:09,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:34:09,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:34:09,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1754, Unknown=3, NotChecked=0, Total=1892 [2021-11-09 08:34:09,308 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 44 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:34:52,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:52,938 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2021-11-09 08:34:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:34:52,939 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-09 08:34:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:52,940 INFO L225 Difference]: With dead ends: 117 [2021-11-09 08:34:52,940 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 08:34:52,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=468, Invalid=3942, Unknown=12, NotChecked=0, Total=4422 [2021-11-09 08:34:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 08:34:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2021-11-09 08:34:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 76 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:34:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2021-11-09 08:34:52,946 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 51 [2021-11-09 08:34:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:52,946 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2021-11-09 08:34:52,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:34:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2021-11-09 08:34:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:34:52,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:52,947 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:52,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:53,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:34:53,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:34:53,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash -461647265, now seen corresponding path program 2 times [2021-11-09 08:34:53,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:53,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050367461] [2021-11-09 08:34:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:53,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:53,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:34:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:34:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:54,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050367461] [2021-11-09 08:34:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050367461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293359170] [2021-11-09 08:34:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:34:54,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:54,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:54,784 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:54,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:34:55,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:34:55,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 08:34:55,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:55,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:34:55,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:34:55,504 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:34:55,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:34:55,514 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:34:55,514 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 11 treesize of output 11 [2021-11-09 08:34:55,582 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 [2021-11-09 08:34:55,587 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 21 treesize of output 17 [2021-11-09 08:34:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:55,647 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 27 treesize of output 11 [2021-11-09 08:34:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:55,662 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 37 treesize of output 17 [2021-11-09 08:34:55,751 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 08:34:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 08:34:55,875 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:34:55,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-09 08:34:55,888 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:34:55,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 63 [2021-11-09 08:34:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:56,020 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:34:56,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 72 [2021-11-09 08:34:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:56,026 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:34:56,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2021-11-09 08:34:56,281 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-09 08:34:56,282 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 88 treesize of output 93 [2021-11-09 08:34:56,306 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-09 08:34:56,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 92 [2021-11-09 08:35:04,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:04,994 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-09 08:35:04,994 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 4 case distinctions, treesize of input 137 treesize of output 110 [2021-11-09 08:35:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:05,012 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-09 08:35:05,013 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 4 case distinctions, treesize of input 98 treesize of output 88 [2021-11-09 08:35:08,921 INFO L354 Elim1Store]: treesize reduction 272, result has 12.0 percent of original size [2021-11-09 08:35:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 162 treesize of output 151 [2021-11-09 08:35:08,960 INFO L354 Elim1Store]: treesize reduction 200, result has 11.1 percent of original size [2021-11-09 08:35:08,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 86 [2021-11-09 08:35:09,125 INFO L354 Elim1Store]: treesize reduction 102, result has 18.4 percent of original size [2021-11-09 08:35:09,125 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 140 treesize of output 95 [2021-11-09 08:35:09,151 INFO L354 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-11-09 08:35:09,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 63 [2021-11-09 08:35:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:11,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293359170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:11,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:11,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 44 [2021-11-09 08:35:11,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059677543] [2021-11-09 08:35:11,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:35:11,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:35:11,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1830, Unknown=1, NotChecked=0, Total=1980 [2021-11-09 08:35:11,430 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 41 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:35:38,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:38,919 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-11-09 08:35:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:35:38,919 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 41 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-09 08:35:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:38,920 INFO L225 Difference]: With dead ends: 97 [2021-11-09 08:35:38,920 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 08:35:38,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=433, Invalid=3468, Unknown=5, NotChecked=0, Total=3906 [2021-11-09 08:35:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 08:35:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2021-11-09 08:35:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:35:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-11-09 08:35:38,925 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 51 [2021-11-09 08:35:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:38,925 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-11-09 08:35:38,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 41 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:35:38,926 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-11-09 08:35:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:35:38,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:38,926 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:38,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:39,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:35:39,127 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:35:39,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1261391184, now seen corresponding path program 2 times [2021-11-09 08:35:39,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:39,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179351749] [2021-11-09 08:35:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:39,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:39,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:35:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:39,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:35:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:40,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:40,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179351749] [2021-11-09 08:35:40,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179351749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:40,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572516114] [2021-11-09 08:35:40,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:40,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:40,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:40,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:35:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:41,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 08:35:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:41,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:35:41,811 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 [2021-11-09 08:35:41,951 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:35:41,952 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 11 treesize of output 11 [2021-11-09 08:35:42,042 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 [2021-11-09 08:35:42,048 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 38 treesize of output 34 [2021-11-09 08:35:42,059 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 35 treesize of output 23 [2021-11-09 08:35:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:42,141 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 27 treesize of output 11 [2021-11-09 08:35:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:42,147 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 52 treesize of output 32 [2021-11-09 08:35:42,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:42,158 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:35:42,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-09 08:35:42,463 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:35:42,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 70 [2021-11-09 08:35:42,468 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:35:42,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2021-11-09 08:35:42,479 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:35:42,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-09 08:35:42,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:42,635 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:35:42,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 97 [2021-11-09 08:35:42,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:42,658 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 08:35:42,659 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 104 treesize of output 98 [2021-11-09 08:35:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:42,665 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:35:42,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 79 [2021-11-09 08:35:43,025 INFO L354 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2021-11-09 08:35:43,026 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 116 treesize of output 121 [2021-11-09 08:35:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:43,057 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-09 08:35:43,058 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 118 treesize of output 112 [2021-11-09 08:35:43,077 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-09 08:35:43,078 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 103 treesize of output 105 [2021-11-09 08:35:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:35:55,300 INFO L354 Elim1Store]: treesize reduction 95, result has 19.5 percent of original size [2021-11-09 08:35:55,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 158 [2021-11-09 08:35:55,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:55,318 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-09 08:35:55,319 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 4 case distinctions, treesize of input 140 treesize of output 117 [2021-11-09 08:35:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:55,336 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-09 08:35:55,336 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 4 case distinctions, treesize of input 105 treesize of output 95 [2021-11-09 08:36:00,702 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-11-09 08:36:00,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 150 [2021-11-09 08:36:00,728 INFO L354 Elim1Store]: treesize reduction 100, result has 13.0 percent of original size [2021-11-09 08:36:00,728 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 7 case distinctions, treesize of input 135 treesize of output 100 [2021-11-09 08:36:00,751 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-09 08:36:00,751 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 82 [2021-11-09 08:36:00,992 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-09 08:36:00,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 76 [2021-11-09 08:36:01,000 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:36:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 51 [2021-11-09 08:36:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:36:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:36:01,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572516114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:01,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:01,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 57 [2021-11-09 08:36:01,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081884253] [2021-11-09 08:36:01,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 08:36:01,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 08:36:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3005, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:36:01,320 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 57 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:36:26,787 WARN L207 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 219 DAG size of output: 121 [2021-11-09 08:36:39,313 WARN L207 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 190 DAG size of output: 117 [2021-11-09 08:36:45,858 WARN L207 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 210 DAG size of output: 137 [2021-11-09 08:36:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:36:48,930 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-11-09 08:36:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 08:36:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2021-11-09 08:36:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:36:48,933 INFO L225 Difference]: With dead ends: 94 [2021-11-09 08:36:48,933 INFO L226 Difference]: Without dead ends: 94 [2021-11-09 08:36:48,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=703, Invalid=6434, Unknown=3, NotChecked=0, Total=7140 [2021-11-09 08:36:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-09 08:36:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-11-09 08:36:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:36:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-11-09 08:36:48,938 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 53 [2021-11-09 08:36:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:36:48,938 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-11-09 08:36:48,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 53 states have internal predecessors, (94), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:36:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-11-09 08:36:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:36:48,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:36:48,940 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:36:48,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:36:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:36:49,155 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:36:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:36:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash -449531630, now seen corresponding path program 1 times [2021-11-09 08:36:49,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:36:49,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061169527] [2021-11-09 08:36:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:49,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:36:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:36:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:49,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:36:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:36:50,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:36:50,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061169527] [2021-11-09 08:36:50,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061169527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:50,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813791207] [2021-11-09 08:36:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:36:50,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:36:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:36:50,243 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:36:50,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:36:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:36:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 08:36:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:36:51,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:36:51,095 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:36:51,095 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 [2021-11-09 08:36:51,225 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-09 08:36:51,225 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 [2021-11-09 08:36:51,506 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-11-09 08:36:51,507 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 35 treesize of output 53 [2021-11-09 08:36:51,649 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 42 treesize of output 38 [2021-11-09 08:36:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:51,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 38 [2021-11-09 08:36:51,946 INFO L354 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2021-11-09 08:36:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 52 [2021-11-09 08:36:52,068 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:36:52,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-09 08:36:52,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:36:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:52,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:36:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:52,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:36:52,170 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 34 [2021-11-09 08:36:52,330 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 08:36:52,330 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 82 treesize of output 63 [2021-11-09 08:36:52,342 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:36:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 77 [2021-11-09 08:36:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:52,786 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:36:52,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 111 [2021-11-09 08:36:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:52,792 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:36:52,793 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 57 [2021-11-09 08:36:52,894 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 08:36:52,895 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 93 treesize of output 80 [2021-11-09 08:36:53,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:36:53,238 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-09 08:36:53,239 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 53 [2021-11-09 08:36:53,345 INFO L354 Elim1Store]: treesize reduction 62, result has 23.5 percent of original size [2021-11-09 08:36:53,345 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 46 [2021-11-09 08:36:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:36:53,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813791207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:36:53,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:36:53,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 44 [2021-11-09 08:36:53,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648022669] [2021-11-09 08:36:53,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:36:53,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:36:53,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:36:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:36:53,361 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:37:14,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:14,099 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-11-09 08:37:14,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 08:37:14,099 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-11-09 08:37:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:14,100 INFO L225 Difference]: With dead ends: 88 [2021-11-09 08:37:14,100 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 08:37:14,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=573, Invalid=3844, Unknown=5, NotChecked=0, Total=4422 [2021-11-09 08:37:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 08:37:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2021-11-09 08:37:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.208955223880597) internal successors, (81), 77 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:37:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-09 08:37:14,105 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 54 [2021-11-09 08:37:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:14,105 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-09 08:37:14,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 40 states have internal predecessors, (90), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:37:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-09 08:37:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:37:14,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:14,107 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:14,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:14,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:14,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:37:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1548963762, now seen corresponding path program 3 times [2021-11-09 08:37:14,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:14,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876957994] [2021-11-09 08:37:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:14,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:15,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:37:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:15,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:37:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:16,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876957994] [2021-11-09 08:37:16,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876957994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:16,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021986492] [2021-11-09 08:37:16,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:37:16,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:16,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:16,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:16,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:37:17,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:37:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-09 08:37:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:17,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:37:17,969 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:37:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:37:18,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-09 08:37:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:18,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-09 08:37:18,199 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 08:37:18,200 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 41 [2021-11-09 08:37:18,308 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 [2021-11-09 08:37:18,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:37:18,323 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:37:18,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 33 [2021-11-09 08:37:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:18,413 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 27 treesize of output 11 [2021-11-09 08:37:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:37:18,431 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:37:18,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 32 [2021-11-09 08:37:18,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:18,608 INFO L354 Elim1Store]: treesize reduction 98, result has 22.2 percent of original size [2021-11-09 08:37:18,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 42 [2021-11-09 08:37:18,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:37:18,804 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-09 08:37:18,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 80 [2021-11-09 08:37:18,819 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-09 08:37:18,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-09 08:37:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:37:19,095 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-09 08:37:19,095 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 4 case distinctions, treesize of input 137 treesize of output 110 [2021-11-09 08:37:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:19,113 INFO L354 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2021-11-09 08:37:19,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 96 [2021-11-09 08:37:19,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:37:19,758 INFO L354 Elim1Store]: treesize reduction 96, result has 36.0 percent of original size [2021-11-09 08:37:19,759 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 127 treesize of output 143 [2021-11-09 08:37:19,784 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 08:37:19,784 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 140 treesize of output 133 [2021-11-09 08:38:09,753 INFO L354 Elim1Store]: treesize reduction 232, result has 12.5 percent of original size [2021-11-09 08:38:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 225 treesize of output 188 [2021-11-09 08:38:09,789 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-11-09 08:38:09,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 126 [2021-11-09 08:38:32,960 INFO L354 Elim1Store]: treesize reduction 284, result has 10.4 percent of original size [2021-11-09 08:38:32,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 330 treesize of output 190 [2021-11-09 08:38:32,992 INFO L354 Elim1Store]: treesize reduction 136, result has 9.9 percent of original size [2021-11-09 08:38:32,992 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 7 new quantified variables, introduced 8 case distinctions, treesize of input 247 treesize of output 161 [2021-11-09 08:38:33,360 INFO L354 Elim1Store]: treesize reduction 130, result has 5.1 percent of original size [2021-11-09 08:38:33,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 9 case distinctions, treesize of input 308 treesize of output 182 [2021-11-09 08:38:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,920 INFO L354 Elim1Store]: treesize reduction 174, result has 11.2 percent of original size [2021-11-09 08:38:35,920 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 7 new quantified variables, introduced 9 case distinctions, treesize of input 141 treesize of output 83 [2021-11-09 08:38:36,154 INFO L354 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2021-11-09 08:38:36,155 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 83 [2021-11-09 08:38:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:40,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021986492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:40,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:40,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 25] total 56 [2021-11-09 08:38:40,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229672815] [2021-11-09 08:38:40,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-09 08:38:40,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:40,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-09 08:38:40,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2969, Unknown=2, NotChecked=0, Total=3192 [2021-11-09 08:38:40,732 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 57 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 53 states have internal predecessors, (102), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:39:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:21,792 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2021-11-09 08:39:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:39:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 53 states have internal predecessors, (102), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2021-11-09 08:39:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:21,793 INFO L225 Difference]: With dead ends: 127 [2021-11-09 08:39:21,794 INFO L226 Difference]: Without dead ends: 127 [2021-11-09 08:39:21,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=696, Invalid=6100, Unknown=10, NotChecked=0, Total=6806 [2021-11-09 08:39:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-09 08:39:21,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-11-09 08:39:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 82 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:39:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2021-11-09 08:39:21,799 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 57 [2021-11-09 08:39:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:21,799 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2021-11-09 08:39:21,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 53 states have internal predecessors, (102), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:39:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2021-11-09 08:39:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:39:21,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:21,800 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:21,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:22,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:22,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:39:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1548963761, now seen corresponding path program 3 times [2021-11-09 08:39:22,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:22,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077522774] [2021-11-09 08:39:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:22,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:22,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:39:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:22,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:39:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:24,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:24,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077522774] [2021-11-09 08:39:24,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077522774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:24,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244816194] [2021-11-09 08:39:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:39:24,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:24,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:24,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:39:26,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:39:26,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-09 08:39:26,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:26,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:39:26,268 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:39:26,268 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 [2021-11-09 08:39:26,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:39:26,495 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:39:26,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:39:26,528 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-09 08:39:26,528 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 22 treesize of output 33 [2021-11-09 08:39:26,687 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 30 treesize of output 26 [2021-11-09 08:39:26,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:39:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:26,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-11-09 08:39:26,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:39:27,048 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-09 08:39:27,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-11-09 08:39:27,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 08:39:27,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:27,274 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:39:27,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 63 [2021-11-09 08:39:27,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:27,285 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:39:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 100 [2021-11-09 08:39:27,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:27,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:27,413 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:39:27,413 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 77 [2021-11-09 08:39:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:27,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:27,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:27,421 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:39:27,421 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 1 case distinctions, treesize of input 108 treesize of output 95 [2021-11-09 08:39:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:27,653 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-09 08:39:27,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 42 [2021-11-09 08:39:27,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:27,875 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-09 08:39:27,875 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 126 treesize of output 103 [2021-11-09 08:39:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:27,912 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:39:27,912 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 121 treesize of output 123 [2021-11-09 08:39:28,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:28,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:28,363 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-09 08:39:28,363 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 4 case distinctions, treesize of input 164 treesize of output 133 [2021-11-09 08:39:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:28,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:28,383 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-09 08:39:28,383 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 4 case distinctions, treesize of input 145 treesize of output 126 [2021-11-09 08:39:29,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:29,527 INFO L354 Elim1Store]: treesize reduction 124, result has 17.3 percent of original size [2021-11-09 08:39:29,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 150 [2021-11-09 08:39:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:29,573 INFO L354 Elim1Store]: treesize reduction 120, result has 20.0 percent of original size [2021-11-09 08:39:29,573 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 150 treesize of output 138 [2021-11-09 08:39:54,813 INFO L354 Elim1Store]: treesize reduction 232, result has 12.5 percent of original size [2021-11-09 08:39:54,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 242 treesize of output 205 [2021-11-09 08:39:54,866 INFO L354 Elim1Store]: treesize reduction 232, result has 12.5 percent of original size [2021-11-09 08:39:54,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 223 treesize of output 170 [2021-11-09 08:40:20,531 INFO L354 Elim1Store]: treesize reduction 294, result has 17.9 percent of original size [2021-11-09 08:40:20,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 239 [2021-11-09 08:40:20,618 INFO L354 Elim1Store]: treesize reduction 184, result has 22.4 percent of original size [2021-11-09 08:40:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 229 treesize of output 208 [2021-11-09 08:40:30,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:31,038 INFO L354 Elim1Store]: treesize reduction 280, result has 9.4 percent of original size [2021-11-09 08:40:31,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 261 treesize of output 171 [2021-11-09 08:40:31,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:31,105 INFO L354 Elim1Store]: treesize reduction 304, result has 8.7 percent of original size [2021-11-09 08:40:31,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 246 treesize of output 204 [2021-11-09 08:40:31,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:31,556 INFO L354 Elim1Store]: treesize reduction 174, result has 9.8 percent of original size [2021-11-09 08:40:31,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 270 treesize of output 160 [2021-11-09 08:40:31,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:31,594 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-11-09 08:40:31,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 125 treesize of output 101 [2021-11-09 08:40:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:34,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244816194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:34,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:34,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 57 [2021-11-09 08:40:34,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482797904] [2021-11-09 08:40:34,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 08:40:34,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 08:40:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3144, Unknown=1, NotChecked=0, Total=3306 [2021-11-09 08:40:34,183 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 58 states, 57 states have (on average 1.7894736842105263) internal successors, (102), 54 states have internal predecessors, (102), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:41:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:31,203 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2021-11-09 08:41:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:41:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.7894736842105263) internal successors, (102), 54 states have internal predecessors, (102), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2021-11-09 08:41:31,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:31,204 INFO L225 Difference]: With dead ends: 121 [2021-11-09 08:41:31,204 INFO L226 Difference]: Without dead ends: 121 [2021-11-09 08:41:31,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=630, Invalid=6502, Unknown=8, NotChecked=0, Total=7140 [2021-11-09 08:41:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-09 08:41:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-11-09 08:41:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 89 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:41:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2021-11-09 08:41:31,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 57 [2021-11-09 08:41:31,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:31,210 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2021-11-09 08:41:31,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.7894736842105263) internal successors, (102), 54 states have internal predecessors, (102), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 08:41:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2021-11-09 08:41:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:41:31,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:31,211 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:31,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:31,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:31,415 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:41:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:31,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1799476384, now seen corresponding path program 3 times [2021-11-09 08:41:31,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:31,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883881464] [2021-11-09 08:41:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:31,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:32,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:32,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:34,762 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:34,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:34,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883881464] [2021-11-09 08:41:34,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883881464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:34,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886656434] [2021-11-09 08:41:34,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:41:34,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:34,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:34,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:34,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:41:36,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:41:36,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:36,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-09 08:41:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:41:36,577 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:41:36,577 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 [2021-11-09 08:41:36,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 08:41:36,944 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-09 08:41:36,944 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 22 treesize of output 33 [2021-11-09 08:41:37,163 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 47 treesize of output 43 [2021-11-09 08:41:37,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-11-09 08:41:37,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:41:37,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:37,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:41:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:37,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2021-11-09 08:41:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:37,386 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:41:37,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-09 08:41:37,706 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-11-09 08:41:37,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-11-09 08:41:37,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:41:38,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:38,016 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:41:38,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 92 [2021-11-09 08:41:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:38,029 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:41:38,030 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 1 case distinctions, treesize of input 142 treesize of output 133 [2021-11-09 08:41:38,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:38,048 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:41:38,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 126 [2021-11-09 08:41:38,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:38,333 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 08:41:38,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 168 [2021-11-09 08:41:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:38,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:38,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:41:38,344 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 100 [2021-11-09 08:41:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:38,352 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:41:38,353 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 1 case distinctions, treesize of input 143 treesize of output 130 [2021-11-09 08:41:38,800 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:41:38,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:41:38,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:38,839 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-11-09 08:41:38,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 44 [2021-11-09 08:41:39,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:39,208 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:41:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 180 [2021-11-09 08:41:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:39,237 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-09 08:41:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 140 [2021-11-09 08:41:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:39,257 INFO L354 Elim1Store]: treesize reduction 167, result has 9.2 percent of original size [2021-11-09 08:41:39,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 276 treesize of output 270 [2021-11-09 08:41:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:39,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:39,585 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-09 08:41:39,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 288 treesize of output 152 [2021-11-09 08:41:39,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:39,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:39,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:39,607 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-09 08:41:39,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 269 treesize of output 217 [2021-11-09 08:41:39,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:39,663 INFO L354 Elim1Store]: treesize reduction 282, result has 17.5 percent of original size [2021-11-09 08:41:39,664 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 250 treesize of output 255 [2021-11-09 08:41:40,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:40,425 INFO L354 Elim1Store]: treesize reduction 124, result has 17.3 percent of original size [2021-11-09 08:41:40,425 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 293 treesize of output 172 [2021-11-09 08:41:40,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:40,464 INFO L354 Elim1Store]: treesize reduction 124, result has 17.3 percent of original size [2021-11-09 08:41:40,464 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 289 treesize of output 252 [2021-11-09 08:41:40,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:40,528 INFO L354 Elim1Store]: treesize reduction 408, result has 14.5 percent of original size [2021-11-09 08:41:40,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 285 treesize of output 282 [2021-11-09 08:41:42,517 INFO L354 Elim1Store]: treesize reduction 232, result has 12.5 percent of original size [2021-11-09 08:41:42,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 616 treesize of output 241 [2021-11-09 08:41:42,588 INFO L354 Elim1Store]: treesize reduction 200, result has 12.7 percent of original size [2021-11-09 08:41:42,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 465 treesize of output 282 [2021-11-09 08:41:42,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:42,636 INFO L354 Elim1Store]: treesize reduction 386, result has 13.5 percent of original size [2021-11-09 08:41:42,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 314 treesize of output 265 [2021-11-09 08:41:44,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:44,075 INFO L354 Elim1Store]: treesize reduction 228, result has 12.6 percent of original size [2021-11-09 08:41:44,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 350 treesize of output 197 [2021-11-09 08:41:44,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:44,127 INFO L354 Elim1Store]: treesize reduction 228, result has 12.6 percent of original size [2021-11-09 08:41:44,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 331 treesize of output 274 [2021-11-09 08:41:44,156 INFO L354 Elim1Store]: treesize reduction 243, result has 12.6 percent of original size [2021-11-09 08:41:44,157 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 256 treesize of output 216 [2021-11-09 08:41:44,168 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 08:41:44,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 207 [2021-11-09 08:41:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:45,407 INFO L354 Elim1Store]: treesize reduction 228, result has 12.6 percent of original size [2021-11-09 08:41:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 308 treesize of output 167 [2021-11-09 08:41:45,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:45,455 INFO L354 Elim1Store]: treesize reduction 220, result has 13.0 percent of original size [2021-11-09 08:41:45,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 153 [2021-11-09 08:41:45,470 INFO L354 Elim1Store]: treesize reduction 80, result has 12.1 percent of original size [2021-11-09 08:41:45,470 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 162 treesize of output 149 [2021-11-09 08:41:45,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:45,786 INFO L354 Elim1Store]: treesize reduction 101, result has 21.7 percent of original size [2021-11-09 08:41:45,787 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 134 [2021-11-09 08:41:45,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:45,807 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-11-09 08:41:45,807 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 81 [2021-11-09 08:41:46,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:41:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:46,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886656434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:46,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:46,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 67 [2021-11-09 08:41:46,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505557210] [2021-11-09 08:41:46,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 08:41:46,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 08:41:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4180, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:41:46,199 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 67 states, 66 states have (on average 1.606060606060606) internal successors, (106), 63 states have internal predecessors, (106), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:42:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:37,765 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-11-09 08:42:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:42:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.606060606060606) internal successors, (106), 63 states have internal predecessors, (106), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-11-09 08:42:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:37,768 INFO L225 Difference]: With dead ends: 107 [2021-11-09 08:42:37,768 INFO L226 Difference]: Without dead ends: 107 [2021-11-09 08:42:37,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=923, Invalid=9171, Unknown=6, NotChecked=0, Total=10100 [2021-11-09 08:42:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-09 08:42:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2021-11-09 08:42:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 83 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:42:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-09 08:42:37,772 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 59 [2021-11-09 08:42:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:37,772 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-09 08:42:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.606060606060606) internal successors, (106), 63 states have internal predecessors, (106), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:42:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-09 08:42:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:42:37,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:37,773 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:37,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:37,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:37,975 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:42:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1747232194, now seen corresponding path program 4 times [2021-11-09 08:42:37,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:37,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722563181] [2021-11-09 08:42:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:37,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:39,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:42,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:42,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722563181] [2021-11-09 08:42:42,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722563181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:42,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745853225] [2021-11-09 08:42:42,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:42:42,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:42,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:42,240 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:42,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:42:43,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:42:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-09 08:42:43,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:43,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:42:44,032 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:42:44,032 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 [2021-11-09 08:42:44,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:42:44,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:42:44,361 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-09 08:42:44,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 08:42:44,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:42:44,522 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 [2021-11-09 08:42:44,543 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:42:44,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2021-11-09 08:42:44,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,665 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:42:44,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2021-11-09 08:42:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:44,689 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 27 treesize of output 11 [2021-11-09 08:42:44,859 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:42:44,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 08:42:44,887 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-11-09 08:42:44,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 25 treesize of output 29 [2021-11-09 08:42:45,095 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 08:42:45,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 67 [2021-11-09 08:42:45,105 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:42:45,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 94 [2021-11-09 08:42:45,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:45,253 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:42:45,253 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 1 case distinctions, treesize of input 121 treesize of output 108 [2021-11-09 08:42:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:45,259 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:42:45,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 62 [2021-11-09 08:42:45,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:45,531 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 08:42:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 08:42:45,820 INFO L354 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2021-11-09 08:42:45,821 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 113 [2021-11-09 08:42:45,844 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 08:42:45,844 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 128 treesize of output 130 [2021-11-09 08:42:47,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:47,134 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-09 08:42:47,135 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 122 [2021-11-09 08:42:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:47,147 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:42:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 121 [2021-11-09 08:42:49,218 INFO L354 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2021-11-09 08:42:49,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 142 [2021-11-09 08:42:49,257 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-09 08:42:49,257 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 133 treesize of output 138 [2021-11-09 08:43:32,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:32,722 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-09 08:43:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 181 [2021-11-09 08:43:32,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:32,736 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-09 08:43:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 140 [2021-11-09 08:43:52,937 INFO L354 Elim1Store]: treesize reduction 290, result has 11.0 percent of original size [2021-11-09 08:43:52,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 449 treesize of output 220 [2021-11-09 08:43:52,997 INFO L354 Elim1Store]: treesize reduction 384, result has 12.1 percent of original size [2021-11-09 08:43:52,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 430 treesize of output 358 [2021-11-09 08:43:53,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 08:43:55,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:43:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2021-11-09 08:43:56,336 INFO L354 Elim1Store]: treesize reduction 474, result has 8.8 percent of original size [2021-11-09 08:43:56,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 413 treesize of output 214 [2021-11-09 08:43:56,447 INFO L354 Elim1Store]: treesize reduction 440, result has 8.9 percent of original size [2021-11-09 08:43:56,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 366 treesize of output 271 [2021-11-09 08:43:56,961 INFO L354 Elim1Store]: treesize reduction 355, result has 2.7 percent of original size [2021-11-09 08:43:56,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 414 treesize of output 288 [2021-11-09 08:43:58,202 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-11-09 08:43:58,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 215 treesize of output 179 [2021-11-09 08:43:58,688 INFO L354 Elim1Store]: treesize reduction 250, result has 12.6 percent of original size [2021-11-09 08:43:58,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 158 treesize of output 82 [2021-11-09 08:43:58,851 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-09 08:43:58,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 154 treesize of output 101 [2021-11-09 08:44:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:44:01,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745853225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:44:01,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:44:01,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35] total 72 [2021-11-09 08:44:01,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202552640] [2021-11-09 08:44:01,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-09 08:44:01,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:44:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-09 08:44:01,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5029, Unknown=1, NotChecked=0, Total=5256 [2021-11-09 08:44:01,466 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:45:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:07,970 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2021-11-09 08:45:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:45:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2021-11-09 08:45:07,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:07,973 INFO L225 Difference]: With dead ends: 163 [2021-11-09 08:45:07,973 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 08:45:07,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=673, Invalid=11973, Unknown=10, NotChecked=0, Total=12656 [2021-11-09 08:45:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 08:45:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 126. [2021-11-09 08:45:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 109 states have (on average 1.165137614678899) internal successors, (127), 119 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:45:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2021-11-09 08:45:07,980 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 63 [2021-11-09 08:45:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:07,981 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2021-11-09 08:45:07,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-09 08:45:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2021-11-09 08:45:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:45:07,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:07,982 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:08,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:08,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:45:08,199 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 20 more)] === [2021-11-09 08:45:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1747232193, now seen corresponding path program 4 times [2021-11-09 08:45:08,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:08,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073569615] [2021-11-09 08:45:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:08,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:10,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:10,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:45:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:14,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:14,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073569615] [2021-11-09 08:45:14,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073569615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:14,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136842127] [2021-11-09 08:45:14,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:45:14,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:14,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:14,259 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:14,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50951ca2-960f-4b27-b17d-d8db7e848e97/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:45:16,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:45:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-09 08:45:16,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:16,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:45:16,984 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 08:45:16,984 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 14 treesize of output 20 [2021-11-09 08:45:17,026 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:45:17,026 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 [2021-11-09 08:45:17,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:45:17,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:45:17,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:17,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:45:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:45:17,606 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-09 08:45:17,607 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 22 treesize of output 33 [2021-11-09 08:45:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-11-09 08:45:17,918 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:45:17,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 54 [2021-11-09 08:45:17,934 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 08:45:17,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-09 08:45:18,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:18,166 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:45:18,166 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 68 [2021-11-09 08:45:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:18,177 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:45:18,178 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 1 case distinctions, treesize of input 75 treesize of output 62 [2021-11-09 08:45:18,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:18,488 INFO L354 Elim1Store]: treesize reduction 50, result has 32.4 percent of original size [2021-11-09 08:45:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 40 [2021-11-09 08:45:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:18,552 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-09 08:45:18,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-11-09 08:45:18,868 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 08:45:18,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 79 [2021-11-09 08:45:18,895 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 08:45:18,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 117 [2021-11-09 08:45:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:19,142 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 08:45:19,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 89 [2021-11-09 08:45:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:19,154 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-09 08:45:19,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 100 [2021-11-09 08:45:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:19,499 INFO L354 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2021-11-09 08:45:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 56 [2021-11-09 08:45:19,876 INFO L354 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2021-11-09 08:45:19,877 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 121 [2021-11-09 08:45:19,918 INFO L354 Elim1Store]: treesize reduction 92, result has 22.0 percent of original size [2021-11-09 08:45:19,918 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 133 treesize of output 138 [2021-11-09 08:45:20,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:20,851 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-09 08:45:20,852 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 139 [2021-11-09 08:45:20,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:20,869 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-09 08:45:20,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 141 [2021-11-09 08:45:23,196 INFO L354 Elim1Store]: treesize reduction 172, result has 16.1 percent of original size [2021-11-09 08:45:23,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 161 [2021-11-09 08:45:23,252 INFO L354 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2021-11-09 08:45:23,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 148 [2021-11-09 08:45:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:48,516 INFO L354 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2021-11-09 08:45:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 198 [2021-11-09 08:45:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:48,528 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-09 08:45:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 154 [2021-11-09 08:46:01,910 INFO L354 Elim1Store]: treesize reduction 482, result has 11.1 percent of original size [2021-11-09 08:46:01,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 266 treesize of output 265 [2021-11-09 08:46:01,992 INFO L354 Elim1Store]: treesize reduction 294, result has 9.8 percent of original size [2021-11-09 08:46:01,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 247 treesize of output 147